<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019b6a75-7275-7293-aa81-70dd42b60983,g:2f14eb31-561d-434f-a5c6-27307f468bf4-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="https://xbrl.org/2023/arcrole/summation-item" xlink:type="simple" xlink:href="https://www.xbrl.org/2023/calculation-1.1.xsd#summation-item"/>
  <link:roleRef roleURI="http://www.erocopper.com/role/ConsolidatedStatementsofFinancialPosition" xlink:type="simple" xlink:href="ero-20251231.xsd#ConsolidatedStatementsofFinancialPosition"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/ConsolidatedStatementsofFinancialPosition" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Liabilities_019b6a75-74ba-7554-ac81-b28eac0bff0c" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLiabilities_019b6a75-74ba-7c66-b9ac-3f2faca4d93a" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentLiabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_Liabilities_019b6a75-74ba-7554-ac81-b28eac0bff0c" xlink:to="loc_ifrs-full_CurrentLiabilities_019b6a75-74ba-7c66-b9ac-3f2faca4d93a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLiabilities_019b6a75-74ba-7afc-bcbf-0804d5675773" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_NoncurrentLiabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_Liabilities_019b6a75-74ba-7554-ac81-b28eac0bff0c" xlink:to="loc_ifrs-full_NoncurrentLiabilities_019b6a75-74ba-7afc-bcbf-0804d5675773" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLiabilities_019b6a75-74ba-7071-af22-e2659ac71c46" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_NoncurrentLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherNoncurrentLiabilities_019b6a75-74ba-7519-9efc-613333f4fd13" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherNoncurrentLiabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_NoncurrentLiabilities_019b6a75-74ba-7071-af22-e2659ac71c46" xlink:to="loc_ifrs-full_OtherNoncurrentLiabilities_019b6a75-74ba-7519-9efc-613333f4fd13" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LongtermBorrowings_019b6a75-74ba-7f8d-b33d-e636331d0ee3" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_LongtermBorrowings"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_NoncurrentLiabilities_019b6a75-74ba-7071-af22-e2659ac71c46" xlink:to="loc_ifrs-full_LongtermBorrowings_019b6a75-74ba-7f8d-b33d-e636331d0ee3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLeaseLiabilities_019b6a75-74ba-7092-81d5-063fc9aa19ed" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_NoncurrentLeaseLiabilities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_NoncurrentLiabilities_019b6a75-74ba-7071-af22-e2659ac71c46" xlink:to="loc_ifrs-full_NoncurrentLeaseLiabilities_019b6a75-74ba-7092-81d5-063fc9aa19ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDeferredTaxLiabilities_019b6a75-74ba-7538-aeef-2cfe7f66e216" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_NetDeferredTaxLiabilities"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_NoncurrentLiabilities_019b6a75-74ba-7071-af22-e2659ac71c46" xlink:to="loc_ifrs-full_NetDeferredTaxLiabilities_019b6a75-74ba-7538-aeef-2cfe7f66e216" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts_019b6a75-74ba-7fcc-82b1-5257c59fc946" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_NoncurrentLiabilities_019b6a75-74ba-7071-af22-e2659ac71c46" xlink:to="loc_ifrs-full_LongtermProvisionForDecommissioningRestorationAndRehabilitationCosts_019b6a75-74ba-7fcc-82b1-5257c59fc946" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentContractLiabilities_019b6a75-74ba-7c1d-ae0e-c128f4a59c6b" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_NoncurrentContractLiabilities"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_NoncurrentLiabilities_019b6a75-74ba-7071-af22-e2659ac71c46" xlink:to="loc_ifrs-full_NoncurrentContractLiabilities_019b6a75-74ba-7c1d-ae0e-c128f4a59c6b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityAttributableToOwnersOfParent_019b6a75-74ba-743c-b2a8-f7014dc04158" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_EquityAttributableToOwnersOfParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_EquityReserves_019b6a75-74ba-7571-8dd3-c6aae4c7654a" xlink:href="ero-20251231.xsd#ero_EquityReserves"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParent_019b6a75-74ba-743c-b2a8-f7014dc04158" xlink:to="loc_ero_EquityReserves_019b6a75-74ba-7571-8dd3-c6aae4c7654a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RetainedEarnings_019b6a75-74ba-79ac-bd28-97289007bc9c" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_RetainedEarnings"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParent_019b6a75-74ba-743c-b2a8-f7014dc04158" xlink:to="loc_ifrs-full_RetainedEarnings_019b6a75-74ba-79ac-bd28-97289007bc9c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssuedCapital_019b6a75-74ba-760c-9dd4-95892eef4883" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IssuedCapital"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParent_019b6a75-74ba-743c-b2a8-f7014dc04158" xlink:to="loc_ifrs-full_IssuedCapital_019b6a75-74ba-760c-9dd4-95892eef4883" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAssets_019b6a75-74ba-7e51-915d-40aac3b2c2aa" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentAssets"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets_019b6a75-74ba-798a-b59d-a46c55b9c055" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentAssets_019b6a75-74ba-7e51-915d-40aac3b2c2aa" xlink:to="loc_ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets_019b6a75-74ba-798a-b59d-a46c55b9c055" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Inventories_019b6a75-74ba-7560-8ff9-e73782a03180" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Inventories"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentAssets_019b6a75-74ba-7e51-915d-40aac3b2c2aa" xlink:to="loc_ifrs-full_Inventories_019b6a75-74ba-7560-8ff9-e73782a03180" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashAndCashEquivalents_019b6a75-74ba-72ca-89ab-f84d321f97cb" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashAndCashEquivalents"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentAssets_019b6a75-74ba-7e51-915d-40aac3b2c2aa" xlink:to="loc_ifrs-full_CashAndCashEquivalents_019b6a75-74ba-72ca-89ab-f84d321f97cb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentTradeReceivables_019b6a75-74ba-701b-bdfb-5dfdffe27e70" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentTradeReceivables"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentAssets_019b6a75-74ba-7e51-915d-40aac3b2c2aa" xlink:to="loc_ifrs-full_CurrentTradeReceivables_019b6a75-74ba-701b-bdfb-5dfdffe27e70" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentInvestments_019b6a75-74ba-7aaa-8a4a-162103c16af0" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentInvestments"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentAssets_019b6a75-74ba-7e51-915d-40aac3b2c2aa" xlink:to="loc_ifrs-full_CurrentInvestments_019b6a75-74ba-7aaa-8a4a-162103c16af0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CurrentIncomeTaxReceivable_019b6a75-74ba-7997-94a7-4a40b97e50f8" xlink:href="ero-20251231.xsd#ero_CurrentIncomeTaxReceivable"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentAssets_019b6a75-74ba-7e51-915d-40aac3b2c2aa" xlink:to="loc_ero_CurrentIncomeTaxReceivable_019b6a75-74ba-7997-94a7-4a40b97e50f8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Assets_019b6a75-74ba-7092-b497-f18b1828d423" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentAssets_019b6a75-74ba-7ad2-a0c8-55a5de6df464" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_NoncurrentAssets"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_Assets_019b6a75-74ba-7092-b497-f18b1828d423" xlink:to="loc_ifrs-full_NoncurrentAssets_019b6a75-74ba-7ad2-a0c8-55a5de6df464" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAssets_019b6a75-74ba-7e0c-8415-0fe8b6006ca7" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentAssets"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_Assets_019b6a75-74ba-7092-b497-f18b1828d423" xlink:to="loc_ifrs-full_CurrentAssets_019b6a75-74ba-7e0c-8415-0fe8b6006ca7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Equity_019b6a75-74ba-724f-9cef-4edb85455458" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Equity"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityAttributableToOwnersOfParent_019b6a75-74ba-7073-ba36-5f8e4133a58c" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_EquityAttributableToOwnersOfParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_Equity_019b6a75-74ba-724f-9cef-4edb85455458" xlink:to="loc_ifrs-full_EquityAttributableToOwnersOfParent_019b6a75-74ba-7073-ba36-5f8e4133a58c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncontrollingInterests_019b6a75-74ba-70bf-ba68-2c715153e20b" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_NoncontrollingInterests"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_Equity_019b6a75-74ba-724f-9cef-4edb85455458" xlink:to="loc_ifrs-full_NoncontrollingInterests_019b6a75-74ba-70bf-ba68-2c715153e20b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityAndLiabilities_019b6a75-74ba-73a5-b39f-92e2830dc058" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_EquityAndLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Liabilities_019b6a75-74ba-75ce-b9fb-772f22b03cf4" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Liabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_EquityAndLiabilities_019b6a75-74ba-73a5-b39f-92e2830dc058" xlink:to="loc_ifrs-full_Liabilities_019b6a75-74ba-75ce-b9fb-772f22b03cf4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Equity_019b6a75-74ba-7038-a9bf-ff422f45d4e9" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Equity"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_EquityAndLiabilities_019b6a75-74ba-73a5-b39f-92e2830dc058" xlink:to="loc_ifrs-full_Equity_019b6a75-74ba-7038-a9bf-ff422f45d4e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentAssets_019b6a75-74ba-70d7-96a8-fec1d62483ed" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_NoncurrentAssets"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_DepositsAndOtherNonCurrentAssets_019b6a75-74ba-7814-96bf-7af36a01e2f6" xlink:href="ero-20251231.xsd#ero_DepositsAndOtherNonCurrentAssets"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_NoncurrentAssets_019b6a75-74ba-70d7-96a8-fec1d62483ed" xlink:to="loc_ero_DepositsAndOtherNonCurrentAssets_019b6a75-74ba-7814-96bf-7af36a01e2f6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment_019b6a75-74ba-70a0-b4a9-e06e54a98dba" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_PropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_NoncurrentAssets_019b6a75-74ba-70d7-96a8-fec1d62483ed" xlink:to="loc_ifrs-full_PropertyPlantAndEquipment_019b6a75-74ba-70a0-b4a9-e06e54a98dba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TangibleExplorationAndEvaluationAssets_019b6a75-74ba-77f5-8035-d5f4b8047101" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_TangibleExplorationAndEvaluationAssets"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_NoncurrentAssets_019b6a75-74ba-70d7-96a8-fec1d62483ed" xlink:to="loc_ifrs-full_TangibleExplorationAndEvaluationAssets_019b6a75-74ba-77f5-8035-d5f4b8047101" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDeferredTaxAssets_019b6a75-74ba-797d-b091-7c5a9d3145e4" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_NetDeferredTaxAssets"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_NoncurrentAssets_019b6a75-74ba-70d7-96a8-fec1d62483ed" xlink:to="loc_ifrs-full_NetDeferredTaxAssets_019b6a75-74ba-797d-b091-7c5a9d3145e4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLiabilities_019b6a75-74ba-7c36-afcf-a6c2b1a822e8" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentTaxLiabilities_019b6a75-74ba-7b2f-8e82-a0340b1082b0" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentTaxLiabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentLiabilities_019b6a75-74ba-7c36-afcf-a6c2b1a822e8" xlink:to="loc_ifrs-full_CurrentTaxLiabilities_019b6a75-74ba-7b2f-8e82-a0340b1082b0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentDerivativeFinancialLiabilities_019b6a75-74ba-7fd5-8b4f-c631ec5d9c9f" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentDerivativeFinancialLiabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentLiabilities_019b6a75-74ba-7c36-afcf-a6c2b1a822e8" xlink:to="loc_ifrs-full_CurrentDerivativeFinancialLiabilities_019b6a75-74ba-7fd5-8b4f-c631ec5d9c9f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherCurrentPayables_019b6a75-74ba-7fe1-95a9-354559be3f0a" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_TradeAndOtherCurrentPayables"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentLiabilities_019b6a75-74ba-7c36-afcf-a6c2b1a822e8" xlink:to="loc_ifrs-full_TradeAndOtherCurrentPayables_019b6a75-74ba-7fe1-95a9-354559be3f0a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings_019b6a75-74ba-7b6a-845c-929074916347" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentLiabilities_019b6a75-74ba-7c36-afcf-a6c2b1a822e8" xlink:to="loc_ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings_019b6a75-74ba-7b6a-845c-929074916347" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLeaseLiabilities_019b6a75-74ba-7f1a-a4c8-f9d70d321cc9" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentLeaseLiabilities"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentLiabilities_019b6a75-74ba-7c36-afcf-a6c2b1a822e8" xlink:to="loc_ifrs-full_CurrentLeaseLiabilities_019b6a75-74ba-7f1a-a4c8-f9d70d321cc9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentContractLiabilities_019b6a75-74ba-7cc8-be80-4af231ac9862" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentContractLiabilities"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentLiabilities_019b6a75-74ba-7c36-afcf-a6c2b1a822e8" xlink:to="loc_ifrs-full_CurrentContractLiabilities_019b6a75-74ba-7cc8-be80-4af231ac9862" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/ConsolidatedStatementsofOperationsandComprehensiveLossIncome" xlink:type="simple" xlink:href="ero-20251231.xsd#ConsolidatedStatementsofOperationsandComprehensiveLossIncome"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/ConsolidatedStatementsofOperationsandComprehensiveLossIncome" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComprehensiveIncome_019b6a75-74ba-7a78-99d2-2b448c7f7612" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ComprehensiveIncome"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLoss_019b6a75-74ba-7a45-9909-1b3e3469399f" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfitLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ComprehensiveIncome_019b6a75-74ba-7a78-99d2-2b448c7f7612" xlink:to="loc_ifrs-full_ProfitLoss_019b6a75-74ba-7a45-9909-1b3e3469399f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslationOtherThanTranslationOfForeignOperations_019b6a75-74ba-79d9-beb3-b2409f9e8598" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslationOtherThanTranslationOfForeignOperations"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ComprehensiveIncome_019b6a75-74ba-7a78-99d2-2b448c7f7612" xlink:to="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslationOtherThanTranslationOfForeignOperations_019b6a75-74ba-79d9-beb3-b2409f9e8598" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossProfit_019b6a75-74bb-72b9-b1c7-d2d9a7187da4" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueFromContractsWithCustomers_019b6a75-74bb-7d60-9750-2965c3c95c84" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_RevenueFromContractsWithCustomers"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_GrossProfit_019b6a75-74bb-72b9-b1c7-d2d9a7187da4" xlink:to="loc_ifrs-full_RevenueFromContractsWithCustomers_019b6a75-74bb-7d60-9750-2965c3c95c84" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CostOfSales_019b6a75-74bb-7504-a60e-47efe66717d0" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CostOfSales"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_GrossProfit_019b6a75-74bb-72b9-b1c7-d2d9a7187da4" xlink:to="loc_ifrs-full_CostOfSales_019b6a75-74bb-7504-a60e-47efe66717d0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-74ba-7dac-b52d-881472056b9c" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxExpenseIncome_019b6a75-74ba-7f60-b91e-7e2d72331d38" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DeferredTaxExpenseIncome"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-74ba-7dac-b52d-881472056b9c" xlink:to="loc_ifrs-full_DeferredTaxExpenseIncome_019b6a75-74ba-7f60-b91e-7e2d72331d38" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentTaxExpenseIncome_019b6a75-74ba-7bc2-aeee-b982d76cc88d" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentTaxExpenseIncome"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-74ba-7dac-b52d-881472056b9c" xlink:to="loc_ifrs-full_CurrentTaxExpenseIncome_019b6a75-74ba-7bc2-aeee-b982d76cc88d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossBeforeTax_019b6a75-74ba-772d-9821-e204df81b342" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfitLossBeforeTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_ForeignExchangeGainLossIncludingExchangeDifferencesOnFairValueOfFinancialInstruments_019b6a75-74ba-7345-97d3-2e2c39a0d14e" xlink:href="ero-20251231.xsd#ero_ForeignExchangeGainLossIncludingExchangeDifferencesOnFairValueOfFinancialInstruments"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ProfitLossBeforeTax_019b6a75-74ba-772d-9821-e204df81b342" xlink:to="loc_ero_ForeignExchangeGainLossIncludingExchangeDifferencesOnFairValueOfFinancialInstruments_019b6a75-74ba-7345-97d3-2e2c39a0d14e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossFromOperatingActivities_019b6a75-74ba-779b-ba51-df90166f4040" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfitLossFromOperatingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ProfitLossBeforeTax_019b6a75-74ba-772d-9821-e204df81b342" xlink:to="loc_ifrs-full_ProfitLossFromOperatingActivities_019b6a75-74ba-779b-ba51-df90166f4040" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherExpenseByNature_019b6a75-74bb-707d-a83f-9f2fd51c853f" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherExpenseByNature"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ProfitLossBeforeTax_019b6a75-74ba-772d-9821-e204df81b342" xlink:to="loc_ifrs-full_OtherExpenseByNature_019b6a75-74bb-707d-a83f-9f2fd51c853f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceCosts_019b6a75-74bb-7638-b39e-54198eb07868" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FinanceCosts"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ProfitLossBeforeTax_019b6a75-74ba-772d-9821-e204df81b342" xlink:to="loc_ifrs-full_FinanceCosts_019b6a75-74bb-7638-b39e-54198eb07868" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceIncome_019b6a75-74bb-70e6-9cf8-35fe62af4119" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FinanceIncome"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ProfitLossBeforeTax_019b6a75-74ba-772d-9821-e204df81b342" xlink:to="loc_ifrs-full_FinanceIncome_019b6a75-74bb-70e6-9cf8-35fe62af4119" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_MiningAndFacilitiesTransactionCosts_019b6a75-74bb-7e24-a6d8-fc3cf8e77c58" xlink:href="ero-20251231.xsd#ero_MiningAndFacilitiesTransactionCosts"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ProfitLossBeforeTax_019b6a75-74ba-772d-9821-e204df81b342" xlink:to="loc_ero_MiningAndFacilitiesTransactionCosts_019b6a75-74bb-7e24-a6d8-fc3cf8e77c58" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLoss_019b6a75-74bb-768c-b080-186a4a51da20" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfitLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-74bb-7b5a-8206-ba1f816268df" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ProfitLoss_019b6a75-74bb-768c-b080-186a4a51da20" xlink:to="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-74bb-7b5a-8206-ba1f816268df" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossBeforeTax_019b6a75-74bb-7ea1-a66d-185e084cf550" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfitLossBeforeTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ProfitLoss_019b6a75-74bb-768c-b080-186a4a51da20" xlink:to="loc_ifrs-full_ProfitLossBeforeTax_019b6a75-74bb-7ea1-a66d-185e084cf550" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossFromOperatingActivities_019b6a75-74ba-71dc-b322-faeb29baf2d5" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfitLossFromOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GeneralAndAdministrativeExpense_019b6a75-74ba-7a41-86f1-701bf01c1494" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ProfitLossFromOperatingActivities_019b6a75-74ba-71dc-b322-faeb29baf2d5" xlink:to="loc_ifrs-full_GeneralAndAdministrativeExpense_019b6a75-74ba-7a41-86f1-701bf01c1494" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossProfit_019b6a75-74ba-7387-b5fa-2e9109ab9b6f" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_GrossProfit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ProfitLossFromOperatingActivities_019b6a75-74ba-71dc-b322-faeb29baf2d5" xlink:to="loc_ifrs-full_GrossProfit_019b6a75-74ba-7387-b5fa-2e9109ab9b6f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_OtherExpenseByFunctionShareBasedCompensation_019b6a75-74ba-7523-b484-cae4afa64f7b" xlink:href="ero-20251231.xsd#ero_OtherExpenseByFunctionShareBasedCompensation"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ProfitLossFromOperatingActivities_019b6a75-74ba-71dc-b322-faeb29baf2d5" xlink:to="loc_ero_OtherExpenseByFunctionShareBasedCompensation_019b6a75-74ba-7523-b484-cae4afa64f7b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_WriteDownsOfExplorationAndEvaluationAssets_019b6a75-74ba-7e20-9f4b-a8ac7443a4a7" xlink:href="ero-20251231.xsd#ero_WriteDownsOfExplorationAndEvaluationAssets"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ProfitLossFromOperatingActivities_019b6a75-74ba-71dc-b322-faeb29baf2d5" xlink:to="loc_ero_WriteDownsOfExplorationAndEvaluationAssets_019b6a75-74ba-7e20-9f4b-a8ac7443a4a7" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/ConsolidatedStatementsofOperationsandComprehensiveLossIncome_1" xlink:type="simple" xlink:href="ero-20251231.xsd#ConsolidatedStatementsofOperationsandComprehensiveLossIncome_1"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/ConsolidatedStatementsofOperationsandComprehensiveLossIncome_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComprehensiveIncome_019b6a75-74ba-76d8-885b-131136f9b14d" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ComprehensiveIncome"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent_019b6a75-74ba-7ba8-a3ee-e00844e6e43d" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ComprehensiveIncome_019b6a75-74ba-76d8-885b-131136f9b14d" xlink:to="loc_ifrs-full_ComprehensiveIncomeAttributableToOwnersOfParent_019b6a75-74ba-7ba8-a3ee-e00844e6e43d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests_019b6a75-74ba-7c89-8497-934d5b406915" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ComprehensiveIncome_019b6a75-74ba-76d8-885b-131136f9b14d" xlink:to="loc_ifrs-full_ComprehensiveIncomeAttributableToNoncontrollingInterests_019b6a75-74ba-7c89-8497-934d5b406915" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLoss_019b6a75-74ba-77df-8954-f19167a1807f" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfitLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossAttributableToNoncontrollingInterests_019b6a75-74ba-7ff6-b45d-05200c0a4ee8" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfitLossAttributableToNoncontrollingInterests"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ProfitLoss_019b6a75-74ba-77df-8954-f19167a1807f" xlink:to="loc_ifrs-full_ProfitLossAttributableToNoncontrollingInterests_019b6a75-74ba-7ff6-b45d-05200c0a4ee8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossAttributableToOwnersOfParent_019b6a75-74ba-7238-90ef-bdafcd8de889" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfitLossAttributableToOwnersOfParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ProfitLoss_019b6a75-74ba-77df-8954-f19167a1807f" xlink:to="loc_ifrs-full_ProfitLossAttributableToOwnersOfParent_019b6a75-74ba-7238-90ef-bdafcd8de889" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/ConsolidatedStatementsofCashFlows" xlink:type="simple" xlink:href="ero-20251231.xsd#ConsolidatedStatementsofCashFlows"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/ConsolidatedStatementsofCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities_019b6a75-74bb-740f-ad7a-354475e60a93" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PurchaseOfExplorationAndEvaluationAssets_019b6a75-74bb-79ba-bbda-74f73a815abc" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_PurchaseOfExplorationAndEvaluationAssets"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities_019b6a75-74bb-740f-ad7a-354475e60a93" xlink:to="loc_ifrs-full_PurchaseOfExplorationAndEvaluationAssets_019b6a75-74bb-79ba-bbda-74f73a815abc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_019b6a75-74bb-73ff-9ddc-4896467acbff" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities_019b6a75-74bb-740f-ad7a-354475e60a93" xlink:to="loc_ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_019b6a75-74bb-73ff-9ddc-4896467acbff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments_019b6a75-74bb-7354-9dea-b6d23c296877" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities_019b6a75-74bb-740f-ad7a-354475e60a93" xlink:to="loc_ifrs-full_CashFlowsFromUsedInDecreaseIncreaseInShorttermDepositsAndInvestments_019b6a75-74bb-7354-9dea-b6d23c296877" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_ProceedsFromShortTermInvestmentsAndInterestReceived_019b6a75-74bb-7f51-8c88-aa0c67705feb" xlink:href="ero-20251231.xsd#ero_ProceedsFromShortTermInvestmentsAndInterestReceived"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities_019b6a75-74bb-740f-ad7a-354475e60a93" xlink:to="loc_ero_ProceedsFromShortTermInvestmentsAndInterestReceived_019b6a75-74bb-7f51-8c88-aa0c67705feb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities_019b6a75-74bb-783f-bb64-a2479b9d39e7" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities_019b6a75-74bb-794f-8258-31de2921a681" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities_019b6a75-74bb-783f-bb64-a2479b9d39e7" xlink:to="loc_ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities_019b6a75-74bb-794f-8258-31de2921a681" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_ProceedsFromBorrowingsClassifiedAsFinancingActivitiesNet_019b6a75-74bb-7fc4-9be2-a49c510f5f53" xlink:href="ero-20251231.xsd#ero_ProceedsFromBorrowingsClassifiedAsFinancingActivitiesNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities_019b6a75-74bb-783f-bb64-a2479b9d39e7" xlink:to="loc_ero_ProceedsFromBorrowingsClassifiedAsFinancingActivitiesNet_019b6a75-74bb-7fc4-9be2-a49c510f5f53" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestPaidClassifiedAsFinancingActivities_019b6a75-74bb-7ee0-87ac-3c2d3006442c" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_InterestPaidClassifiedAsFinancingActivities"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities_019b6a75-74bb-783f-bb64-a2479b9d39e7" xlink:to="loc_ifrs-full_InterestPaidClassifiedAsFinancingActivities_019b6a75-74bb-7ee0-87ac-3c2d3006442c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_ProceedsFromExerciseOfOptionsAndWarrants_019b6a75-74bb-7965-b617-01f18be5ced8" xlink:href="ero-20251231.xsd#ero_ProceedsFromExerciseOfOptionsAndWarrants"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities_019b6a75-74bb-783f-bb64-a2479b9d39e7" xlink:to="loc_ero_ProceedsFromExerciseOfOptionsAndWarrants_019b6a75-74bb-7965-b617-01f18be5ced8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_019b6a75-74bb-7021-b33e-967b8f6c00e1" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities_019b6a75-74bb-783f-bb64-a2479b9d39e7" xlink:to="loc_ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_019b6a75-74bb-7021-b33e-967b8f6c00e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_PaymentsForOtherFinanceExpenses_019b6a75-74bb-7b7e-aa53-7d57d27b8983" xlink:href="ero-20251231.xsd#ero_PaymentsForOtherFinanceExpenses"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities_019b6a75-74bb-783f-bb64-a2479b9d39e7" xlink:to="loc_ero_PaymentsForOtherFinanceExpenses_019b6a75-74bb-7b7e-aa53-7d57d27b8983" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProceedsFromIssuingShares_019b6a75-74bb-745d-9557-5b678aff6fe0" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProceedsFromIssuingShares"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities_019b6a75-74bb-783f-bb64-a2479b9d39e7" xlink:to="loc_ifrs-full_ProceedsFromIssuingShares_019b6a75-74bb-745d-9557-5b678aff6fe0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_019b6a75-74bb-7edf-94bd-74a54e1bb111" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities_019b6a75-74bb-7b7e-96bc-648defb465c5" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_019b6a75-74bb-7edf-94bd-74a54e1bb111" xlink:to="loc_ifrs-full_CashFlowsFromUsedInFinancingActivities_019b6a75-74bb-7b7e-96bc-648defb465c5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities_019b6a75-74bb-7420-935c-1f5de59b1939" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_019b6a75-74bb-7edf-94bd-74a54e1bb111" xlink:to="loc_ifrs-full_CashFlowsFromUsedInInvestingActivities_019b6a75-74bb-7420-935c-1f5de59b1939" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents_019b6a75-74bb-7017-b58f-4d7868ab3dec" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_019b6a75-74bb-7edf-94bd-74a54e1bb111" xlink:to="loc_ifrs-full_EffectOfExchangeRateChangesOnCashAndCashEquivalents_019b6a75-74bb-7017-b58f-4d7868ab3dec" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities_019b6a75-74bb-7b84-80bd-d8068549ff51" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_019b6a75-74bb-7edf-94bd-74a54e1bb111" xlink:to="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities_019b6a75-74bb-7b84-80bd-d8068549ff51" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInOperations_019b6a75-74bb-730a-bd25-e52b6f601f45" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceCosts_019b6a75-74bb-737e-b4c0-df993861ddc8" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FinanceCosts"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperations_019b6a75-74bb-730a-bd25-e52b6f601f45" xlink:to="loc_ifrs-full_FinanceCosts_019b6a75-74bb-737e-b4c0-df993861ddc8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForSharebasedPayments_019b6a75-74bb-7616-9685-1ddc2477fbb4" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForSharebasedPayments"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperations_019b6a75-74bb-730a-bd25-e52b6f601f45" xlink:to="loc_ifrs-full_AdjustmentsForSharebasedPayments_019b6a75-74bb-7616-9685-1ddc2477fbb4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForIncreaseDecreaseInContractLiabilities_019b6a75-74bb-7874-9caa-8ebac7c038ed" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInContractLiabilities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperations_019b6a75-74bb-730a-bd25-e52b6f601f45" xlink:to="loc_ifrs-full_AdjustmentsForIncreaseDecreaseInContractLiabilities_019b6a75-74bb-7874-9caa-8ebac7c038ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceIncome_019b6a75-74bb-7804-acbb-a4660b1adbe9" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FinanceIncome"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperations_019b6a75-74bb-730a-bd25-e52b6f601f45" xlink:to="loc_ifrs-full_FinanceIncome_019b6a75-74bb-7804-acbb-a4660b1adbe9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForUnrealisedForeignExchangeLossesGains_019b6a75-74bb-71b3-a6b1-53b09b32850b" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForUnrealisedForeignExchangeLossesGains"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperations_019b6a75-74bb-730a-bd25-e52b6f601f45" xlink:to="loc_ifrs-full_AdjustmentsForUnrealisedForeignExchangeLossesGains_019b6a75-74bb-71b3-a6b1-53b09b32850b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_AdjustmentsNoncashWorkingCapitalItems_019b6a75-74bb-76c4-83f4-0a0199af7378" xlink:href="ero-20251231.xsd#ero_AdjustmentsNoncashWorkingCapitalItems"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperations_019b6a75-74bb-730a-bd25-e52b6f601f45" xlink:to="loc_ero_AdjustmentsNoncashWorkingCapitalItems_019b6a75-74bb-76c4-83f4-0a0199af7378" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense_019b6a75-74bb-7073-86f4-f30accd51f48" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperations_019b6a75-74bb-730a-bd25-e52b6f601f45" xlink:to="loc_ifrs-full_AdjustmentsForDepreciationAndAmortisationExpense_019b6a75-74bb-7073-86f4-f30accd51f48" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForIncomeTaxExpense_019b6a75-74bb-7852-833a-e678e9fccdea" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForIncomeTaxExpense"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperations_019b6a75-74bb-730a-bd25-e52b6f601f45" xlink:to="loc_ifrs-full_AdjustmentsForIncomeTaxExpense_019b6a75-74bb-7852-833a-e678e9fccdea" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherAdjustmentsToReconcileProfitLoss_019b6a75-74bb-751f-aa35-25b1c04e2343" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherAdjustmentsToReconcileProfitLoss"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperations_019b6a75-74bb-730a-bd25-e52b6f601f45" xlink:to="loc_ifrs-full_OtherAdjustmentsToReconcileProfitLoss_019b6a75-74bb-751f-aa35-25b1c04e2343" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLoss_019b6a75-74bb-77da-be80-849fa1150c41" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfitLoss"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperations_019b6a75-74bb-730a-bd25-e52b6f601f45" xlink:to="loc_ifrs-full_ProfitLoss_019b6a75-74bb-77da-be80-849fa1150c41" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WritedownsReversalsOfPropertyPlantAndEquipment_019b6a75-74bb-7b45-92d2-8de4c2611e04" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_WritedownsReversalsOfPropertyPlantAndEquipment"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperations_019b6a75-74bb-730a-bd25-e52b6f601f45" xlink:to="loc_ifrs-full_WritedownsReversalsOfPropertyPlantAndEquipment_019b6a75-74bb-7b45-92d2-8de4c2611e04" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities_019b6a75-74bb-76ce-af00-89f0bec4b32b" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInOperations_019b6a75-74bb-791b-8199-e540e1360cd9" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperations"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities_019b6a75-74bb-76ce-af00-89f0bec4b32b" xlink:to="loc_ifrs-full_CashFlowsFromUsedInOperations_019b6a75-74bb-791b-8199-e540e1360cd9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CashPaymentsForFuturesContractsForwardContractsOptionContractsAndSwapContractsClassifiedAsOperatingActivities_019b6a75-74bb-78fa-8e65-c5ca708bff03" xlink:href="ero-20251231.xsd#ero_CashPaymentsForFuturesContractsForwardContractsOptionContractsAndSwapContractsClassifiedAsOperatingActivities"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities_019b6a75-74bb-76ce-af00-89f0bec4b32b" xlink:to="loc_ero_CashPaymentsForFuturesContractsForwardContractsOptionContractsAndSwapContractsClassifiedAsOperatingActivities_019b6a75-74bb-78fa-8e65-c5ca708bff03" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_ProvisionSettlementForDecommissioningRestorationAndRehabilitationCosts_019b6a75-74bb-7af7-9da5-552df1448a82" xlink:href="ero-20251231.xsd#ero_ProvisionSettlementForDecommissioningRestorationAndRehabilitationCosts"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities_019b6a75-74bb-76ce-af00-89f0bec4b32b" xlink:to="loc_ero_ProvisionSettlementForDecommissioningRestorationAndRehabilitationCosts_019b6a75-74bb-7af7-9da5-552df1448a82" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities_019b6a75-74bb-7e83-81a5-e3b200d04638" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities_019b6a75-74bb-76ce-af00-89f0bec4b32b" xlink:to="loc_ifrs-full_IncomeTaxesPaidRefundClassifiedAsOperatingActivities_019b6a75-74bb-7e83-81a5-e3b200d04638" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_AdvancePaymentReceived_019ca5b0-b4b5-74f5-8532-4e30cf044b90" xlink:href="ero-20251231.xsd#ero_AdvancePaymentReceived"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperatingActivities_019b6a75-74bb-76ce-af00-89f0bec4b32b" xlink:to="loc_ero_AdvancePaymentReceived_019ca5b0-b4b5-74f5-8532-4e30cf044b90" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/ConsolidatedStatementsofChangesinShareholdersEquity" xlink:type="simple" xlink:href="ero-20251231.xsd#ConsolidatedStatementsofChangesinShareholdersEquity"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/ConsolidatedStatementsofChangesinShareholdersEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComprehensiveIncome_019b6a75-74bb-7f62-a6e8-074e371d79be" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ComprehensiveIncome"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLoss_019b6a75-74bb-7351-9c51-846a53472fc1" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfitLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ComprehensiveIncome_019b6a75-74bb-7f62-a6e8-074e371d79be" xlink:to="loc_ifrs-full_ProfitLoss_019b6a75-74bb-7351-9c51-846a53472fc1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncome_019b6a75-74bb-78f0-8af4-e9a26c65859f" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncome"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_ComprehensiveIncome_019b6a75-74bb-7f62-a6e8-074e371d79be" xlink:to="loc_ifrs-full_OtherComprehensiveIncome_019b6a75-74bb-78f0-8af4-e9a26c65859f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/SegmentDisclosureDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#SegmentDisclosureDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/SegmentDisclosureDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CostOfSales_019b6a75-74bb-7044-896e-8819a70d2342" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CostOfSales"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesSalesExpense_019b6a75-74bb-72b4-98ff-50f0a012ccfd" xlink:href="ero-20251231.xsd#ero_CostOfSalesSalesExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CostOfSales_019b6a75-74bb-7044-896e-8819a70d2342" xlink:to="loc_ero_CostOfSalesSalesExpense_019b6a75-74bb-72b4-98ff-50f0a012ccfd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesProduction_019b6a75-74bb-73ef-9f79-0b76db119eae" xlink:href="ero-20251231.xsd#ero_CostOfSalesProduction"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CostOfSales_019b6a75-74bb-7044-896e-8819a70d2342" xlink:to="loc_ero_CostOfSalesProduction_019b6a75-74bb-73ef-9f79-0b76db119eae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesDepreciationAndDepletionExpenseIncludingNetChangeInInventoryDepreciation_019b6a75-74bb-70f5-8cc2-bc94e89bbdc7" xlink:href="ero-20251231.xsd#ero_CostOfSalesDepreciationAndDepletionExpenseIncludingNetChangeInInventoryDepreciation"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CostOfSales_019b6a75-74bb-7044-896e-8819a70d2342" xlink:to="loc_ero_CostOfSalesDepreciationAndDepletionExpenseIncludingNetChangeInInventoryDepreciation_019b6a75-74bb-70f5-8cc2-bc94e89bbdc7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesOtherExpense_019ca560-d1bb-7493-bdd7-2ccf0b1203d1" xlink:href="ero-20251231.xsd#ero_CostOfSalesOtherExpense"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CostOfSales_019b6a75-74bb-7044-896e-8819a70d2342" xlink:to="loc_ero_CostOfSalesOtherExpense_019ca560-d1bb-7493-bdd7-2ccf0b1203d1" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/InventoriesDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#InventoriesDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/InventoriesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Inventories_019b6a75-74bb-75e0-b9dc-bd0a1590eddd" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Inventories"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentRawMaterialsAndCurrentProductionSupplies_019b6a75-74bb-749a-b6b6-495966746aa7" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentRawMaterialsAndCurrentProductionSupplies"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_Inventories_019b6a75-74bb-75e0-b9dc-bd0a1590eddd" xlink:to="loc_ifrs-full_CurrentRawMaterialsAndCurrentProductionSupplies_019b6a75-74bb-749a-b6b6-495966746aa7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WorkInProgress_019b6a75-74bb-7b1a-a2b6-1547f07c6282" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_WorkInProgress"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_Inventories_019b6a75-74bb-75e0-b9dc-bd0a1590eddd" xlink:to="loc_ifrs-full_WorkInProgress_019b6a75-74bb-7b1a-a2b6-1547f07c6282" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentOreStockpiles_019b6a75-74bb-700b-b78b-70f170c49fb3" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentOreStockpiles"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_Inventories_019b6a75-74bb-75e0-b9dc-bd0a1590eddd" xlink:to="loc_ifrs-full_CurrentOreStockpiles_019b6a75-74bb-700b-b78b-70f170c49fb3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinishedGoods_019b6a75-74bb-72c5-8b64-e31e805104f6" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FinishedGoods"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_Inventories_019b6a75-74bb-75e0-b9dc-bd0a1590eddd" xlink:to="loc_ifrs-full_FinishedGoods_019b6a75-74bb-72c5-8b64-e31e805104f6" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/OtherCurrentAssetsDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#OtherCurrentAssetsDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/OtherCurrentAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets_019b6a75-74bb-7fb6-b014-fcadd1a607cc" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CurrentNotesReceivable_019b6a75-74bb-71cd-b709-7d645b6b49c3" xlink:href="ero-20251231.xsd#ero_CurrentNotesReceivable"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets_019b6a75-74bb-7fb6-b014-fcadd1a607cc" xlink:to="loc_ero_CurrentNotesReceivable_019b6a75-74bb-71cd-b709-7d645b6b49c3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentValueAddedTaxReceivables_019b6a75-74bb-7726-abd9-4a432f699a5f" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentValueAddedTaxReceivables"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets_019b6a75-74bb-7fb6-b014-fcadd1a607cc" xlink:to="loc_ifrs-full_CurrentValueAddedTaxReceivables_019b6a75-74bb-7726-abd9-4a432f699a5f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAdvancesToSuppliers_019b6a75-74bb-7fbd-a410-62f471c2430c" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentAdvancesToSuppliers"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets_019b6a75-74bb-7fb6-b014-fcadd1a607cc" xlink:to="loc_ifrs-full_CurrentAdvancesToSuppliers_019b6a75-74bb-7fbd-a410-62f471c2430c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CurrentAdvancesToEmployees_019b6a75-74bb-75ee-bdc8-dcd50b442f27" xlink:href="ero-20251231.xsd#ero_CurrentAdvancesToEmployees"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets_019b6a75-74bb-7fb6-b014-fcadd1a607cc" xlink:to="loc_ero_CurrentAdvancesToEmployees_019b6a75-74bb-75ee-bdc8-dcd50b442f27" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentPrepaidExpenses_019b6a75-74bb-77d8-bf61-7c4d0eb521b2" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentPrepaidExpenses"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets_019b6a75-74bb-7fb6-b014-fcadd1a607cc" xlink:to="loc_ifrs-full_CurrentPrepaidExpenses_019b6a75-74bb-77d8-bf61-7c4d0eb521b2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentDerivativeFinancialAssets_019b6a75-74bb-72c5-ae89-e9bfd3e6c9a8" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentDerivativeFinancialAssets"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CurrentPrepaymentsAndOtherCurrentAssets_019b6a75-74bb-7fb6-b014-fcadd1a607cc" xlink:to="loc_ifrs-full_CurrentDerivativeFinancialAssets_019b6a75-74bb-72c5-ae89-e9bfd3e6c9a8" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/DepositsandOtherNoncurrentAssetsDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#DepositsandOtherNoncurrentAssetsDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/DepositsandOtherNoncurrentAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ero_DepositsAndOtherNonCurrentAssets_019b6a75-74bb-7689-978f-d3bc2a0b6147" xlink:href="ero-20251231.xsd#ero_DepositsAndOtherNonCurrentAssets"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_NotesReceivable_019b6a75-74bb-791e-85fc-a396956089e9" xlink:href="ero-20251231.xsd#ero_NotesReceivable"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_DepositsAndOtherNonCurrentAssets_019b6a75-74bb-7689-978f-d3bc2a0b6147" xlink:to="loc_ero_NotesReceivable_019b6a75-74bb-791e-85fc-a396956089e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ValueAddedTaxReceivables_019b6a75-74bb-7fbf-a123-e9f9638effe9" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ValueAddedTaxReceivables"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_DepositsAndOtherNonCurrentAssets_019b6a75-74bb-7689-978f-d3bc2a0b6147" xlink:to="loc_ifrs-full_ValueAddedTaxReceivables_019b6a75-74bb-7fbf-a123-e9f9638effe9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_DepositsAndOtherMiscellaneousAssetsNonCurrent_019b6a75-74bb-7d2c-a512-141eb91dda5a" xlink:href="ero-20251231.xsd#ero_DepositsAndOtherMiscellaneousAssetsNonCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_DepositsAndOtherNonCurrentAssets_019b6a75-74bb-7689-978f-d3bc2a0b6147" xlink:to="loc_ero_DepositsAndOtherMiscellaneousAssetsNonCurrent_019b6a75-74bb-7d2c-a512-141eb91dda5a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/AccountsPayableandAccruedLiabilitiesDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#AccountsPayableandAccruedLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/AccountsPayableandAccruedLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherCurrentPayables_019b6a75-74bb-7fbd-af94-71ce8125e95f" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_TradeAndOtherCurrentPayables"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities_019b6a75-74bb-7246-b8e7-59b8424b3be6" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_TradeAndOtherCurrentPayables_019b6a75-74bb-7fbd-af94-71ce8125e95f" xlink:to="loc_ifrs-full_CurrentAccruedExpensesAndOtherCurrentLiabilities_019b6a75-74bb-7246-b8e7-59b8424b3be6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax_019b6a75-74bb-702b-b069-eae7c7a958a1" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_TradeAndOtherCurrentPayables_019b6a75-74bb-7fbd-af94-71ce8125e95f" xlink:to="loc_ifrs-full_CurrentPayablesOnSocialSecurityAndTaxesOtherThanIncomeTax_019b6a75-74bb-702b-b069-eae7c7a958a1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_019b6a75-74bb-7d8a-9d06-38b63724776f" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_TradeAndOtherCurrentPayables_019b6a75-74bb-7fbd-af94-71ce8125e95f" xlink:to="loc_ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_019b6a75-74bb-7d8a-9d06-38b63724776f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentProvisionsForEmployeeBenefits_019b6a75-74bb-7a6c-b6eb-a9e389b37458" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentProvisionsForEmployeeBenefits"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_TradeAndOtherCurrentPayables_019b6a75-74bb-7fbd-af94-71ce8125e95f" xlink:to="loc_ifrs-full_CurrentProvisionsForEmployeeBenefits_019b6a75-74bb-7a6c-b6eb-a9e389b37458" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_LiabilitiesFromShareBasedPaymentTransactionsCurrent_019b6a75-74bb-7010-9edf-28bb0e1fe31b" xlink:href="ero-20251231.xsd#ero_LiabilitiesFromShareBasedPaymentTransactionsCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_TradeAndOtherCurrentPayables_019b6a75-74bb-7fbd-af94-71ce8125e95f" xlink:to="loc_ero_LiabilitiesFromShareBasedPaymentTransactionsCurrent_019b6a75-74bb-7010-9edf-28bb0e1fe31b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherShorttermProvisions_019b6a75-74bb-7099-9782-982549844f4c" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherShorttermProvisions"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_TradeAndOtherCurrentPayables_019b6a75-74bb-7fbd-af94-71ce8125e95f" xlink:to="loc_ifrs-full_OtherShorttermProvisions_019b6a75-74bb-7099-9782-982549844f4c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/LoansandBorrowingsScheduleDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#LoansandBorrowingsScheduleDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/LoansandBorrowingsScheduleDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Borrowings_019b6a75-74bb-7e54-8b26-57349eb26678" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Borrowings"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings_019b6a75-74bb-7e9a-b447-7b55e949e827" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_Borrowings_019b6a75-74bb-7e54-8b26-57349eb26678" xlink:to="loc_ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings_019b6a75-74bb-7e9a-b447-7b55e949e827" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LongtermBorrowings_019b6a75-74bb-7093-abc1-02b13b5ed39c" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_LongtermBorrowings"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_Borrowings_019b6a75-74bb-7e54-8b26-57349eb26678" xlink:to="loc_ifrs-full_LongtermBorrowings_019b6a75-74bb-7093-abc1-02b13b5ed39c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/OtherNoncurrentLiabilitiesDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#OtherNoncurrentLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/OtherNoncurrentLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherNoncurrentLiabilities_019b6a75-757e-75da-b958-6ee74c678e2f" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherNoncurrentLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011_019b6a75-757e-7749-8c4e-a8951b55a065" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_OtherNoncurrentLiabilities_019b6a75-757e-75da-b958-6ee74c678e2f" xlink:to="loc_ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011_019b6a75-757e-7749-8c4e-a8951b55a065" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LongtermLegalProceedingsProvision_019b6a75-757e-7189-b882-861c56c48d58" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_LongtermLegalProceedingsProvision"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_OtherNoncurrentLiabilities_019b6a75-757e-75da-b958-6ee74c678e2f" xlink:to="loc_ifrs-full_LongtermLegalProceedingsProvision_019b6a75-757e-7189-b882-861c56c48d58" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_OtherNonCurrentMiscellaneousLiabilities_019b6a75-757e-7928-a481-ffec2402e687" xlink:href="ero-20251231.xsd#ero_OtherNonCurrentMiscellaneousLiabilities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_OtherNoncurrentLiabilities_019b6a75-757e-75da-b958-6ee74c678e2f" xlink:to="loc_ero_OtherNonCurrentMiscellaneousLiabilities_019b6a75-757e-7928-a481-ffec2402e687" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_NonCurrentValueAddedTaxAndOtherTaxesPayables_019b6a75-757e-7283-9eee-7cf66999aa7f" xlink:href="ero-20251231.xsd#ero_NonCurrentValueAddedTaxAndOtherTaxesPayables"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_OtherNoncurrentLiabilities_019b6a75-757e-75da-b958-6ee74c678e2f" xlink:to="loc_ero_NonCurrentValueAddedTaxAndOtherTaxesPayables_019b6a75-757e-7283-9eee-7cf66999aa7f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_NoncurrentDividendsPayableToNoncontrollingInterest_019ca5b6-cafb-7531-83f1-39152afe89d9" xlink:href="ero-20251231.xsd#ero_NoncurrentDividendsPayableToNoncontrollingInterest"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_OtherNoncurrentLiabilities_019b6a75-757e-75da-b958-6ee74c678e2f" xlink:to="loc_ero_NoncurrentDividendsPayableToNoncontrollingInterest_019ca5b6-cafb-7531-83f1-39152afe89d9" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/ShareCapitalNetIncomeperShareDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#ShareCapitalNetIncomeperShareDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/ShareCapitalNetIncomeperShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustedWeightedAverageShares_019b6a75-757e-7cfc-8e34-5540fa00ea3d" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustedWeightedAverageShares"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_DilutiveEffectOfWarrantsOnNumberOfOrdinaryShares_019b6a75-757e-7244-9664-4a40fce72c10" xlink:href="ero-20251231.xsd#ero_DilutiveEffectOfWarrantsOnNumberOfOrdinaryShares"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_AdjustedWeightedAverageShares_019b6a75-757e-7cfc-8e34-5540fa00ea3d" xlink:to="loc_ero_DilutiveEffectOfWarrantsOnNumberOfOrdinaryShares_019b6a75-757e-7244-9664-4a40fce72c10" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares_019b6a75-757e-7719-a46d-3d1ae898a95e" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_AdjustedWeightedAverageShares_019b6a75-757e-7cfc-8e34-5540fa00ea3d" xlink:to="loc_ifrs-full_DilutiveEffectOfShareOptionsOnNumberOfOrdinaryShares_019b6a75-757e-7719-a46d-3d1ae898a95e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_DilutiveEffectOfShareUnitsOnNumberOfOrdinaryShares_019b6a75-757e-7bed-8f51-17f18bc38a3d" xlink:href="ero-20251231.xsd#ero_DilutiveEffectOfShareUnitsOnNumberOfOrdinaryShares"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_AdjustedWeightedAverageShares_019b6a75-757e-7cfc-8e34-5540fa00ea3d" xlink:to="loc_ero_DilutiveEffectOfShareUnitsOnNumberOfOrdinaryShares_019b6a75-757e-7bed-8f51-17f18bc38a3d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageShares_019b6a75-757e-7115-8226-24d19f6c82cd" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_WeightedAverageShares"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_AdjustedWeightedAverageShares_019b6a75-757e-7cfc-8e34-5540fa00ea3d" xlink:to="loc_ifrs-full_WeightedAverageShares_019b6a75-757e-7115-8226-24d19f6c82cd" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/CostofSalesDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#CostofSalesDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/CostofSalesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CostOfSales_019b6a75-757e-74fd-8378-2786b105f682" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CostOfSales"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesProduction_019b6a75-757e-71b1-9cf9-b7291c6cc747" xlink:href="ero-20251231.xsd#ero_CostOfSalesProduction"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CostOfSales_019b6a75-757e-74fd-8378-2786b105f682" xlink:to="loc_ero_CostOfSalesProduction_019b6a75-757e-71b1-9cf9-b7291c6cc747" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesSalesExpense_019b6a75-757e-7ae6-b863-d0fde02849e8" xlink:href="ero-20251231.xsd#ero_CostOfSalesSalesExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CostOfSales_019b6a75-757e-74fd-8378-2786b105f682" xlink:to="loc_ero_CostOfSalesSalesExpense_019b6a75-757e-7ae6-b863-d0fde02849e8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesDepreciationAndDepletionExpense_019b6a75-757e-7970-9d95-6cbdcb3868ce" xlink:href="ero-20251231.xsd#ero_CostOfSalesDepreciationAndDepletionExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CostOfSales_019b6a75-757e-74fd-8378-2786b105f682" xlink:to="loc_ero_CostOfSalesDepreciationAndDepletionExpense_019b6a75-757e-7970-9d95-6cbdcb3868ce" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesChangeInInventoryDepreciationAndDepletion_019b6a75-757e-7060-9f64-6d8fc283869a" xlink:href="ero-20251231.xsd#ero_CostOfSalesChangeInInventoryDepreciationAndDepletion"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CostOfSales_019b6a75-757e-74fd-8378-2786b105f682" xlink:to="loc_ero_CostOfSalesChangeInInventoryDepreciationAndDepletion_019b6a75-757e-7060-9f64-6d8fc283869a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesOtherExpense_019ca4bc-a822-7b11-bd93-93eda89e1e95" xlink:href="ero-20251231.xsd#ero_CostOfSalesOtherExpense"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_CostOfSales_019b6a75-757e-74fd-8378-2786b105f682" xlink:to="loc_ero_CostOfSalesOtherExpense_019ca4bc-a822-7b11-bd93-93eda89e1e95" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesProduction_019b6a75-757e-7b58-846e-947de284b562" xlink:href="ero-20251231.xsd#ero_CostOfSalesProduction"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesWagesAndSalaries_019b6a75-757e-7ed6-afc4-76eb0c391dff" xlink:href="ero-20251231.xsd#ero_CostOfSalesWagesAndSalaries"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_CostOfSalesProduction_019b6a75-757e-7b58-846e-947de284b562" xlink:to="loc_ero_CostOfSalesWagesAndSalaries_019b6a75-757e-7ed6-afc4-76eb0c391dff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesChangeInInventoryExcludingDepreciationAndDepletion_019b6a75-757e-7494-858d-6142caf31382" xlink:href="ero-20251231.xsd#ero_CostOfSalesChangeInInventoryExcludingDepreciationAndDepletion"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_CostOfSalesProduction_019b6a75-757e-7b58-846e-947de284b562" xlink:to="loc_ero_CostOfSalesChangeInInventoryExcludingDepreciationAndDepletion_019b6a75-757e-7494-858d-6142caf31382" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesMaterials_019b6a75-757e-7f6e-8d1c-68a632cab3e8" xlink:href="ero-20251231.xsd#ero_CostOfSalesMaterials"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_CostOfSalesProduction_019b6a75-757e-7b58-846e-947de284b562" xlink:to="loc_ero_CostOfSalesMaterials_019b6a75-757e-7f6e-8d1c-68a632cab3e8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesOther_019b6a75-757e-7baa-80c8-d1cbe8d633b2" xlink:href="ero-20251231.xsd#ero_CostOfSalesOther"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_CostOfSalesProduction_019b6a75-757e-7b58-846e-947de284b562" xlink:to="loc_ero_CostOfSalesOther_019b6a75-757e-7baa-80c8-d1cbe8d633b2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesUtilitiesExpense_019b6a75-757e-7cd0-b3e2-e49bfa7c0a80" xlink:href="ero-20251231.xsd#ero_CostOfSalesUtilitiesExpense"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_CostOfSalesProduction_019b6a75-757e-7b58-846e-947de284b562" xlink:to="loc_ero_CostOfSalesUtilitiesExpense_019b6a75-757e-7cd0-b3e2-e49bfa7c0a80" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesContractedServices_019b6a75-757e-7788-8dcb-aca68509e002" xlink:href="ero-20251231.xsd#ero_CostOfSalesContractedServices"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_CostOfSalesProduction_019b6a75-757e-7b58-846e-947de284b562" xlink:to="loc_ero_CostOfSalesContractedServices_019b6a75-757e-7788-8dcb-aca68509e002" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CostOfSalesMaintenanceCosts_019b6a75-757e-7f1e-a88e-f9d4f0d4fe1f" xlink:href="ero-20251231.xsd#ero_CostOfSalesMaintenanceCosts"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_CostOfSalesProduction_019b6a75-757e-7b58-846e-947de284b562" xlink:to="loc_ero_CostOfSalesMaintenanceCosts_019b6a75-757e-7f1e-a88e-f9d4f0d4fe1f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/GeneralandAdministrativeExpensesDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#GeneralandAdministrativeExpensesDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/GeneralandAdministrativeExpensesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GeneralAndAdministrativeExpense_019b6a75-757e-7032-beb9-6d2786f67d7d" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_GeneralAndAdministrativeExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationAndAmortisationExpense_019b6a75-757e-7f88-a9af-675871eb9fcc" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DepreciationAndAmortisationExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_GeneralAndAdministrativeExpense_019b6a75-757e-7032-beb9-6d2786f67d7d" xlink:to="loc_ifrs-full_DepreciationAndAmortisationExpense_019b6a75-757e-7f88-a9af-675871eb9fcc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_OtherGeneralAndAdministrativeExpense_019b6a75-757e-7f6c-a6fb-4e92e218e88b" xlink:href="ero-20251231.xsd#ero_OtherGeneralAndAdministrativeExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_GeneralAndAdministrativeExpense_019b6a75-757e-7032-beb9-6d2786f67d7d" xlink:to="loc_ero_OtherGeneralAndAdministrativeExpense_019b6a75-757e-7f6c-a6fb-4e92e218e88b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_SalariesAndConsultingFees_019b6a75-757e-758e-97a8-13e27d211371" xlink:href="ero-20251231.xsd#ero_SalariesAndConsultingFees"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_GeneralAndAdministrativeExpense_019b6a75-757e-7032-beb9-6d2786f67d7d" xlink:to="loc_ero_SalariesAndConsultingFees_019b6a75-757e-758e-97a8-13e27d211371" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_IncentivePayments_019b6a75-757e-73fb-8fec-4a934e89aa23" xlink:href="ero-20251231.xsd#ero_IncentivePayments"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_GeneralAndAdministrativeExpense_019b6a75-757e-7032-beb9-6d2786f67d7d" xlink:to="loc_ero_IncentivePayments_019b6a75-757e-73fb-8fec-4a934e89aa23" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfessionalFeesExpense_019b6a75-757e-7848-9e68-bb021029363e" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProfessionalFeesExpense"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_GeneralAndAdministrativeExpense_019b6a75-757e-7032-beb9-6d2786f67d7d" xlink:to="loc_ifrs-full_ProfessionalFeesExpense_019b6a75-757e-7848-9e68-bb021029363e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdministrativeExpense_019b6a75-757e-7af9-bd9d-8aa4cfdf3541" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdministrativeExpense"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_GeneralAndAdministrativeExpense_019b6a75-757e-7032-beb9-6d2786f67d7d" xlink:to="loc_ifrs-full_AdministrativeExpense_019b6a75-757e-7af9-bd9d-8aa4cfdf3541" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/FinanceExpenseDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#FinanceExpenseDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/FinanceExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceCosts_019b6a75-757e-7ec9-84f9-ca8b7af43a31" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FinanceCosts"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestExpenseOnLeaseLiabilities_019b6a75-757e-773b-a760-f56f7ab063c3" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_InterestExpenseOnLeaseLiabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_FinanceCosts_019b6a75-757e-7ec9-84f9-ca8b7af43a31" xlink:to="loc_ifrs-full_InterestExpenseOnLeaseLiabilities_019b6a75-757e-773b-a760-f56f7ab063c3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_CommitmentFees_019b6a75-757e-7da1-b919-01b06d495a9c" xlink:href="ero-20251231.xsd#ero_CommitmentFees"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_FinanceCosts_019b6a75-757e-7ec9-84f9-ca8b7af43a31" xlink:to="loc_ero_CommitmentFees_019b6a75-757e-7da1-b919-01b06d495a9c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherFinanceCost_019b6a75-757e-7fa9-a8ce-620bf3573328" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherFinanceCost"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_FinanceCosts_019b6a75-757e-7ec9-84f9-ca8b7af43a31" xlink:to="loc_ifrs-full_OtherFinanceCost_019b6a75-757e-7fa9-a8ce-620bf3573328" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives_019b6a75-757e-7e64-9997-547eec3c6515" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_FinanceCosts_019b6a75-757e-7ec9-84f9-ca8b7af43a31" xlink:to="loc_ifrs-full_GainsLossesOnChangeInFairValueOfDerivatives_019b6a75-757e-7e64-9997-547eec3c6515" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_AccretionOfMineClosuresAndRehabilitationProvisions_019b6a75-757e-7bcc-936e-03f9291416e9" xlink:href="ero-20251231.xsd#ero_AccretionOfMineClosuresAndRehabilitationProvisions"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_FinanceCosts_019b6a75-757e-7ec9-84f9-ca8b7af43a31" xlink:to="loc_ero_AccretionOfMineClosuresAndRehabilitationProvisions_019b6a75-757e-7bcc-936e-03f9291416e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_InterestExpenseOnBorrowingsExcludingCapitalizedAmount_019b6a75-757e-7f1e-8357-a5e770498ffb" xlink:href="ero-20251231.xsd#ero_InterestExpenseOnBorrowingsExcludingCapitalizedAmount"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_FinanceCosts_019b6a75-757e-7ec9-84f9-ca8b7af43a31" xlink:to="loc_ero_InterestExpenseOnBorrowingsExcludingCapitalizedAmount_019b6a75-757e-7f1e-8357-a5e770498ffb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_AccretionOfContractsLiabilities_019b6a75-757e-7be8-8d21-2e706ca3197e" xlink:href="ero-20251231.xsd#ero_AccretionOfContractsLiabilities"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_FinanceCosts_019b6a75-757e-7ec9-84f9-ca8b7af43a31" xlink:to="loc_ero_AccretionOfContractsLiabilities_019b6a75-757e-7be8-8d21-2e706ca3197e" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/ForeignExchangeLossGainDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#ForeignExchangeLossGainDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/ForeignExchangeLossGainDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ero_ForeignExchangeGainLossIncludingExchangeDifferencesOnFairValueOfFinancialInstruments_019b6a75-757e-7f26-baed-0b7c8b2ae686" xlink:href="ero-20251231.xsd#ero_ForeignExchangeGainLossIncludingExchangeDifferencesOnFairValueOfFinancialInstruments"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_GainsLossesOnFinancialInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncome_019b6a75-757e-7c27-9aee-92a184d29cdf" xlink:href="ero-20251231.xsd#ero_GainsLossesOnFinancialInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncome"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_ForeignExchangeGainLossIncludingExchangeDifferencesOnFairValueOfFinancialInstruments_019b6a75-757e-7f26-baed-0b7c8b2ae686" xlink:to="loc_ero_GainsLossesOnFinancialInstrumentsMeasuredAtFairValueThroughOtherComprehensiveIncome_019b6a75-757e-7c27-9aee-92a184d29cdf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_ForeignExchangeLossOnDebt_019b6a75-757e-72a0-b8bb-6cf84d51900f" xlink:href="ero-20251231.xsd#ero_ForeignExchangeLossOnDebt"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_ForeignExchangeGainLossIncludingExchangeDifferencesOnFairValueOfFinancialInstruments_019b6a75-757e-7f26-baed-0b7c8b2ae686" xlink:to="loc_ero_ForeignExchangeLossOnDebt_019b6a75-757e-72a0-b8bb-6cf84d51900f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_GainsLossesOnFinancialInstrumentsAtFairValueThroughProfitOrLoss_019b6a75-757e-70ab-829f-1653294c4fff" xlink:href="ero-20251231.xsd#ero_GainsLossesOnFinancialInstrumentsAtFairValueThroughProfitOrLoss"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_ForeignExchangeGainLossIncludingExchangeDifferencesOnFairValueOfFinancialInstruments_019b6a75-757e-7f26-baed-0b7c8b2ae686" xlink:to="loc_ero_GainsLossesOnFinancialInstrumentsAtFairValueThroughProfitOrLoss_019b6a75-757e-70ab-829f-1653294c4fff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_OtherAdjustmentsForForeignExchangeGainsLosses_019b6a75-757e-7c95-83c3-1b7be053e956" xlink:href="ero-20251231.xsd#ero_OtherAdjustmentsForForeignExchangeGainsLosses"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_ForeignExchangeGainLossIncludingExchangeDifferencesOnFairValueOfFinancialInstruments_019b6a75-757e-7f26-baed-0b7c8b2ae686" xlink:to="loc_ero_OtherAdjustmentsForForeignExchangeGainsLosses_019b6a75-757e-7c95-83c3-1b7be053e956" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/IncomeTaxesReconciliationofIncomeTaxExpenseDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#IncomeTaxesReconciliationofIncomeTaxExpenseDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/IncomeTaxesReconciliationofIncomeTaxExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-757e-7ed2-aae3-a87ed5344cc0" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_TaxEffectOfChangeInTemporaryDifferencesNotPreviouslyRecognized_019b6a75-757e-7b09-a092-a89a6495331d" xlink:href="ero-20251231.xsd#ero_TaxEffectOfChangeInTemporaryDifferencesNotPreviouslyRecognized"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-757e-7ed2-aae3-a87ed5344cc0" xlink:to="loc_ero_TaxEffectOfChangeInTemporaryDifferencesNotPreviouslyRecognized_019b6a75-757e-7b09-a092-a89a6495331d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TaxEffectOfForeignTaxRates_019b6a75-757e-7561-bff5-069dadad8fb1" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_TaxEffectOfForeignTaxRates"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-757e-7ed2-aae3-a87ed5344cc0" xlink:to="loc_ifrs-full_TaxEffectOfForeignTaxRates_019b6a75-757e-7561-bff5-069dadad8fb1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TaxExpenseIncomeAtApplicableTaxRate_019b6a75-757e-792f-a1be-8e8e3e2a3d3f" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_TaxExpenseIncomeAtApplicableTaxRate"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-757e-7ed2-aae3-a87ed5344cc0" xlink:to="loc_ifrs-full_TaxExpenseIncomeAtApplicableTaxRate_019b6a75-757e-792f-a1be-8e8e3e2a3d3f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_TaxEffectOfItemsNotTaxableInDeterminingTaxableProfitTaxLoss_019b6a75-757e-7094-97af-4533a6312dbd" xlink:href="ero-20251231.xsd#ero_TaxEffectOfItemsNotTaxableInDeterminingTaxableProfitTaxLoss"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-757e-7ed2-aae3-a87ed5344cc0" xlink:to="loc_ero_TaxEffectOfItemsNotTaxableInDeterminingTaxableProfitTaxLoss_019b6a75-757e-7094-97af-4533a6312dbd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome_019b6a75-757e-7cf2-9469-5cd352714cef" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-757e-7ed2-aae3-a87ed5344cc0" xlink:to="loc_ifrs-full_OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome_019b6a75-757e-7cf2-9469-5cd352714cef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_TaxEffectOfChangeInTaxLaw_019b6a75-757e-7729-9829-756a148d7add" xlink:href="ero-20251231.xsd#ero_TaxEffectOfChangeInTaxLaw"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-757e-7ed2-aae3-a87ed5344cc0" xlink:to="loc_ero_TaxEffectOfChangeInTaxLaw_019b6a75-757e-7729-9829-756a148d7add" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/IncomeTaxesComponentsofIncomeTaxExpenseDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#IncomeTaxesComponentsofIncomeTaxExpenseDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/IncomeTaxesComponentsofIncomeTaxExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-757e-7e1a-9007-7dc4c824b65a" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences_019b6a75-757e-7bde-92c5-f3fe56f66524" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-757e-7e1a-9007-7dc4c824b65a" xlink:to="loc_ifrs-full_DeferredTaxExpenseIncomeRelatingToOriginationAndReversalOfTemporaryDifferences_019b6a75-757e-7bde-92c5-f3fe56f66524" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentTaxExpenseIncome_019b6a75-757e-7fd2-9c72-487729c2dab9" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentTaxExpenseIncome"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-757e-7e1a-9007-7dc4c824b65a" xlink:to="loc_ifrs-full_CurrentTaxExpenseIncome_019b6a75-757e-7fd2-9c72-487729c2dab9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_TaxExpenseIncomeIncludingIncomeTaxRelatingToComponentsOfOtherComprehensiveIncome_019b6a75-757e-77d0-be7b-509e99a82f51" xlink:href="ero-20251231.xsd#ero_TaxExpenseIncomeIncludingIncomeTaxRelatingToComponentsOfOtherComprehensiveIncome"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-757e-79d2-9e60-0496e4fcaf39" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_TaxExpenseIncomeIncludingIncomeTaxRelatingToComponentsOfOtherComprehensiveIncome_019b6a75-757e-77d0-be7b-509e99a82f51" xlink:to="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019b6a75-757e-79d2-9e60-0496e4fcaf39" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome_019b6a75-757e-7f23-b5a3-82a708cc1247" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_TaxExpenseIncomeIncludingIncomeTaxRelatingToComponentsOfOtherComprehensiveIncome_019b6a75-757e-77d0-be7b-509e99a82f51" xlink:to="loc_ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome_019b6a75-757e-7f23-b5a3-82a708cc1247" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/IncomeTaxesDeferredTaxAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#IncomeTaxesDeferredTaxAssetsandLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/IncomeTaxesDeferredTaxAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxLiabilityAsset_019b6a75-757e-70e7-ba23-857a7b916270" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DeferredTaxLiabilityAsset"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxAssets_019b6a75-757e-777d-ae0c-8abf9352bb0c" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DeferredTaxAssets"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_DeferredTaxLiabilityAsset_019b6a75-757e-70e7-ba23-857a7b916270" xlink:to="loc_ifrs-full_DeferredTaxAssets_019b6a75-757e-777d-ae0c-8abf9352bb0c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxLiabilities_019b6a75-757e-7c36-876a-2ff0b540cc99" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DeferredTaxLiabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_DeferredTaxLiabilityAsset_019b6a75-757e-70e7-ba23-857a7b916270" xlink:to="loc_ifrs-full_DeferredTaxLiabilities_019b6a75-757e-7c36-876a-2ff0b540cc99" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/RelatedPartyTransactionsDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#RelatedPartyTransactionsDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/RelatedPartyTransactionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_KeyManagementPersonnelCompensation_019b6a75-757e-7cb0-9c5e-be80d2fe1576" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_KeyManagementPersonnelCompensation"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment_019b6a75-757e-7cc7-aa31-3b10ad61ad66" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_KeyManagementPersonnelCompensation_019b6a75-757e-7cb0-9c5e-be80d2fe1576" xlink:to="loc_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment_019b6a75-757e-7cc7-aa31-3b10ad61ad66" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits_019b6a75-757e-7f74-9a44-5f5eefec0b7c" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ifrs-full_KeyManagementPersonnelCompensation_019b6a75-757e-7cb0-9c5e-be80d2fe1576" xlink:to="loc_ifrs-full_KeyManagementPersonnelCompensationShorttermEmployeeBenefits_019b6a75-757e-7f74-9a44-5f5eefec0b7c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.erocopper.com/role/SupplementalCashFlowInformationDetails" xlink:type="simple" xlink:href="ero-20251231.xsd#SupplementalCashFlowInformationDetails"/>
  <link:calculationLink xlink:role="http://www.erocopper.com/role/SupplementalCashFlowInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ero_AdjustmentsNoncashWorkingCapitalItems_019b6a75-757e-7b10-a6c8-d26687c892af" xlink:href="ero-20251231.xsd#ero_AdjustmentsNoncashWorkingCapitalItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable_019b6a75-757e-722b-a816-0cfb2655b139" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_AdjustmentsNoncashWorkingCapitalItems_019b6a75-757e-7b10-a6c8-d26687c892af" xlink:to="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable_019b6a75-757e-722b-a816-0cfb2655b139" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories_019b6a75-757e-7f05-8a81-3ec59961542f" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInInventories"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_AdjustmentsNoncashWorkingCapitalItems_019b6a75-757e-7b10-a6c8-d26687c892af" xlink:to="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories_019b6a75-757e-7f05-8a81-3ec59961542f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInOtherAssets_019b6a75-757e-7701-a369-e047333207fd" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInOtherAssets"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_AdjustmentsNoncashWorkingCapitalItems_019b6a75-757e-7b10-a6c8-d26687c892af" xlink:to="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInOtherAssets_019b6a75-757e-7701-a369-e047333207fd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables_019b6a75-757e-7c94-ae50-70af1c998c7c" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_AdjustmentsNoncashWorkingCapitalItems_019b6a75-757e-7b10-a6c8-d26687c892af" xlink:to="loc_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables_019b6a75-757e-7c94-ae50-70af1c998c7c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_ero_ContractWithCustomerLiabilityIncreaseDecrease_019b6a75-757e-7aa3-981d-d3dc7420a5f0" xlink:href="ero-20251231.xsd#ero_ContractWithCustomerLiabilityIncreaseDecrease"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_ero_AdjustmentsNoncashWorkingCapitalItems_019b6a75-757e-7b10-a6c8-d26687c892af" xlink:to="loc_ero_ContractWithCustomerLiabilityIncreaseDecrease_019b6a75-757e-7aa3-981d-d3dc7420a5f0" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
