<?xml version="1.0" encoding="us-ascii" standalone="yes"?>
<!--XBRL Document Created with XBRLMaster-->
<!--Version: 2.3.08-->
<!--Based on XBRL 2.1-->
<!--Date of creation: 07/26/2026-->
<!--Software architectural design and coding: A'c Dharmapremananda Avt.-->
<!--Copyright (c) 2026 I-NET Business Solutions, Inc. All Rights Reserved.-->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://ahr.com/role/Cover" xlink:href="ahr-20260331.xsd#Cover" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/StatementsOfFinancialPosition" xlink:href="ahr-20260331.xsd#StatementsOfFinancialPosition" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/StatementsOfNetLossAndComprehensiveLoss" xlink:href="ahr-20260331.xsd#StatementsOfNetLossAndComprehensiveLoss" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/StatementsOfChangesInDeficiencyEquity" xlink:href="ahr-20260331.xsd#StatementsOfChangesInDeficiencyEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/StatementsOfCashFlows" xlink:href="ahr-20260331.xsd#StatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/NatureAndContinuanceOfOperations" xlink:href="ahr-20260331.xsd#NatureAndContinuanceOfOperations" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/MaterialAccountingPolicies" xlink:href="ahr-20260331.xsd#MaterialAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/CASH" xlink:href="ahr-20260331.xsd#CASH" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/MarketableSecurities" xlink:href="ahr-20260331.xsd#MarketableSecurities" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/RestrictedCash" xlink:href="ahr-20260331.xsd#RestrictedCash" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/AmountsReceivableAndOtherAssets" xlink:href="ahr-20260331.xsd#AmountsReceivableAndOtherAssets" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/ExplorationAndEvaluationExpensesAndCostRecoveries" xlink:href="ahr-20260331.xsd#ExplorationAndEvaluationExpensesAndCostRecoveries" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/JointVentureCorporationAuroraMineralsLtd" xlink:href="ahr-20260331.xsd#JointVentureCorporationAuroraMineralsLtd" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/AccountsPayableAndAccruedLiabilities" xlink:href="ahr-20260331.xsd#AccountsPayableAndAccruedLiabilities" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/DirectorsLoan" xlink:href="ahr-20260331.xsd#DirectorsLoan" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/ShareCapitalAndReserves" xlink:href="ahr-20260331.xsd#ShareCapitalAndReserves" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/RelatedPartyTransactions" xlink:href="ahr-20260331.xsd#RelatedPartyTransactions" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/SupplementaryInformationToTheStatementsOfNetLossAndComprehensiveLoss" xlink:href="ahr-20260331.xsd#SupplementaryInformationToTheStatementsOfNetLossAndComprehensiveLoss" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/OfficeLeaseRightOfUseAssetAndLeaseLiability" xlink:href="ahr-20260331.xsd#OfficeLeaseRightOfUseAssetAndLeaseLiability" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/FinancialRiskManagement" xlink:href="ahr-20260331.xsd#FinancialRiskManagement" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/IncomeTaxes" xlink:href="ahr-20260331.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/EventsAfterTheReportingPeriod" xlink:href="ahr-20260331.xsd#EventsAfterTheReportingPeriod" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/MaterialAccountingPoliciesPolicies" xlink:href="ahr-20260331.xsd#MaterialAccountingPoliciesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/MaterialAccountingPoliciesTables" xlink:href="ahr-20260331.xsd#MaterialAccountingPoliciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/MarketableSecuritiesTables" xlink:href="ahr-20260331.xsd#MarketableSecuritiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/RestrictedCashTables" xlink:href="ahr-20260331.xsd#RestrictedCashTables" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/AmountsReceivableAndOtherAssetsTables" xlink:href="ahr-20260331.xsd#AmountsReceivableAndOtherAssetsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/ExplorationAndEvaluationExpensesAndCostRecoveriesTables" xlink:href="ahr-20260331.xsd#ExplorationAndEvaluationExpensesAndCostRecoveriesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/JointVentureCorporationAuroraMineralsLtdTables" xlink:href="ahr-20260331.xsd#JointVentureCorporationAuroraMineralsLtdTables" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/AccountsPayableAndAccruedLiabilitiesTables" xlink:href="ahr-20260331.xsd#AccountsPayableAndAccruedLiabilitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/DirectorsLoanTables" xlink:href="ahr-20260331.xsd#DirectorsLoanTables" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/ShareCapitalAndReservesTables" xlink:href="ahr-20260331.xsd#ShareCapitalAndReservesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/RelatedPartyTransactionsTables" xlink:href="ahr-20260331.xsd#RelatedPartyTransactionsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/SupplementaryInformationToTheStatementsOfLossTables" xlink:href="ahr-20260331.xsd#SupplementaryInformationToTheStatementsOfLossTables" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/OfficeLeaseRightOfUseAssetAndLeaseLiabilityTables" xlink:href="ahr-20260331.xsd#OfficeLeaseRightOfUseAssetAndLeaseLiabilityTables" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/IncomeTaxesTables" xlink:href="ahr-20260331.xsd#IncomeTaxesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/NatureAndContinuanceOfOperationsDetailsNarrative" xlink:href="ahr-20260331.xsd#NatureAndContinuanceOfOperationsDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/MaterialAccountingPoliciesDetails" xlink:href="ahr-20260331.xsd#MaterialAccountingPoliciesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/MaterialAccountingPoliciesDetailsNarrative" xlink:href="ahr-20260331.xsd#MaterialAccountingPoliciesDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/CashDetailsNarrative" xlink:href="ahr-20260331.xsd#CashDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/MarketableSecuritiesDetails" xlink:href="ahr-20260331.xsd#MarketableSecuritiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/MarketableSecuritiesDetailsNarrative" xlink:href="ahr-20260331.xsd#MarketableSecuritiesDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/RestrictedCashDetails" xlink:href="ahr-20260331.xsd#RestrictedCashDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/AmountsReceivableAndOtherAssetsDetails" xlink:href="ahr-20260331.xsd#AmountsReceivableAndOtherAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/ExplorationAndEvaluationExpensesAndCostRecoveriesDetails" xlink:href="ahr-20260331.xsd#ExplorationAndEvaluationExpensesAndCostRecoveriesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/ExplorationAndEvaluationExpensesAndCostRecoveriesDetailsNarrative" xlink:href="ahr-20260331.xsd#ExplorationAndEvaluationExpensesAndCostRecoveriesDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/JointVentureCorporationAuroraMineralsLtdDetails" xlink:href="ahr-20260331.xsd#JointVentureCorporationAuroraMineralsLtdDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/JointVentureCorporationAuroraMineralsLtdDetailsNarrative" xlink:href="ahr-20260331.xsd#JointVentureCorporationAuroraMineralsLtdDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/AccountsPayableAndAccruedLiabilitiesDetails" xlink:href="ahr-20260331.xsd#AccountsPayableAndAccruedLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/DirectorsLoanDetails" xlink:href="ahr-20260331.xsd#DirectorsLoanDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/DirectorsLoanDetails1" xlink:href="ahr-20260331.xsd#DirectorsLoanDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/DirectorsLoanDetails2" xlink:href="ahr-20260331.xsd#DirectorsLoanDetails2" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/DirectorsLoanDetailsNarrative" xlink:href="ahr-20260331.xsd#DirectorsLoanDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/ShareCapitalAndReservesDetails" xlink:href="ahr-20260331.xsd#ShareCapitalAndReservesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/ShareCapitalAndReservesDetails1" xlink:href="ahr-20260331.xsd#ShareCapitalAndReservesDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/ShareCapitalAndReservesDetails2" xlink:href="ahr-20260331.xsd#ShareCapitalAndReservesDetails2" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/ShareCapitalAndReservesDetails3" xlink:href="ahr-20260331.xsd#ShareCapitalAndReservesDetails3" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/ShareCapitalAndReservesDetails4" xlink:href="ahr-20260331.xsd#ShareCapitalAndReservesDetails4" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/ShareCapitalAndReservesDetailsNarrative" xlink:href="ahr-20260331.xsd#ShareCapitalAndReservesDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/RelatedPartyTransactionsDetails" xlink:href="ahr-20260331.xsd#RelatedPartyTransactionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/RelatedPartyTransactionsDetails1" xlink:href="ahr-20260331.xsd#RelatedPartyTransactionsDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/RelatedPartyTransactionsDetailsNarrative" xlink:href="ahr-20260331.xsd#RelatedPartyTransactionsDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/SupplementaryInformationToTheStatementsOfLossDetails" xlink:href="ahr-20260331.xsd#SupplementaryInformationToTheStatementsOfLossDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/SupplementaryInformationToTheStatementsOfLossDetails1" xlink:href="ahr-20260331.xsd#SupplementaryInformationToTheStatementsOfLossDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/OfficeLeaseRightOfUseAssetAndLeaseLiabilityDetails" xlink:href="ahr-20260331.xsd#OfficeLeaseRightOfUseAssetAndLeaseLiabilityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/OfficeLeaseRightOfUseAssetAndLeaseLiabilityDetails1" xlink:href="ahr-20260331.xsd#OfficeLeaseRightOfUseAssetAndLeaseLiabilityDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/OfficeLeaseRightOfUseAssetAndLeaseLiabilityDetails2" xlink:href="ahr-20260331.xsd#OfficeLeaseRightOfUseAssetAndLeaseLiabilityDetails2" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/OfficeLeaseRightOfUseAssetAndLeaseLiabilityDetailsNarrative" xlink:href="ahr-20260331.xsd#OfficeLeaseRightOfUseAssetAndLeaseLiabilityDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/IncomeTaxesDetails" xlink:href="ahr-20260331.xsd#IncomeTaxesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/IncomeTaxesDetails1" xlink:href="ahr-20260331.xsd#IncomeTaxesDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/IncomeTaxesDetailsNarrative" xlink:href="ahr-20260331.xsd#IncomeTaxesDetailsNarrative" xlink:type="simple" />
  <link:roleRef roleURI="http://ahr.com/role/EventsAfterTheReportingPeriodDetailsNarrative" xlink:href="ahr-20260331.xsd#EventsAfterTheReportingPeriodDetailsNarrative" xlink:type="simple" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/Cover" xlink:title="00000001 - Document - Document and Entity Information" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/StatementsOfFinancialPosition" xlink:title="000002 - Statement - Statements of Financial Position">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentAssets" xlink:label="loc_ifrs-fullCurrentAssets" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="loc_ifrs-fullCashAndCashEquivalents" />
    <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCurrentAssets" xlink:to="loc_ifrs-fullCashAndCashEquivalents" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_TradeAndOtherCurrentReceivables" xlink:label="loc_ifrs-fullTradeAndOtherCurrentReceivables" />
    <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCurrentAssets" xlink:to="loc_ifrs-fullTradeAndOtherCurrentReceivables" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_MarketableSecuritiesCurrentAssets" xlink:label="loc_ahrMarketableSecuritiesCurrentAssets" />
    <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCurrentAssets" xlink:to="loc_ahrMarketableSecuritiesCurrentAssets" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Assets" xlink:label="loc_ifrs-fullAssets" />
    <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullAssets" xlink:to="loc_ifrs-fullCurrentAssets" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_NoncurrentRestrictedCashAndCashEquivalents" xlink:label="loc_ifrs-fullNoncurrentRestrictedCashAndCashEquivalents" />
    <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullAssets" xlink:to="loc_ifrs-fullNoncurrentRestrictedCashAndCashEquivalents" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_RightofuseAssets" xlink:label="loc_ifrs-fullRightofuseAssets" />
    <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullAssets" xlink:to="loc_ifrs-fullRightofuseAssets" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_InvestmentsInAuroraMinerals" xlink:label="loc_ahrInvestmentsInAuroraMinerals" />
    <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullAssets" xlink:to="loc_ahrInvestmentsInAuroraMinerals" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentLiabilities" xlink:label="loc_ifrs-fullCurrentLiabilities" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:label="loc_ifrs-fullTradeAndOtherCurrentPayablesToTradeSuppliers" />
    <link:calculationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCurrentLiabilities" xlink:to="loc_ifrs-fullTradeAndOtherCurrentPayablesToTradeSuppliers" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Advances" xlink:label="loc_ifrs-fullAdvances" />
    <link:calculationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCurrentLiabilities" xlink:to="loc_ifrs-fullAdvances" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties" xlink:label="loc_ifrs-fullTradeAndOtherCurrentPayablesToRelatedParties" />
    <link:calculationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCurrentLiabilities" xlink:to="loc_ifrs-fullTradeAndOtherCurrentPayablesToRelatedParties" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ShorttermBorrowings" xlink:label="loc_ifrs-fullShorttermBorrowings" />
    <link:calculationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCurrentLiabilities" xlink:to="loc_ifrs-fullShorttermBorrowings" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentWarrantLiability" xlink:label="loc_ifrs-fullCurrentWarrantLiability" />
    <link:calculationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCurrentLiabilities" xlink:to="loc_ifrs-fullCurrentWarrantLiability" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CurrentLeaseLiabilities" xlink:label="loc_ifrs-fullCurrentLeaseLiabilities" />
    <link:calculationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCurrentLiabilities" xlink:to="loc_ifrs-fullCurrentLeaseLiabilities" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Liabilities" xlink:label="loc_ifrs-fullLiabilities" />
    <link:calculationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullLiabilities" xlink:to="loc_ifrs-fullCurrentLiabilities" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_LongtermBorrowings" xlink:label="loc_ifrs-fullLongtermBorrowings" />
    <link:calculationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullLiabilities" xlink:to="loc_ifrs-fullLongtermBorrowings" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_NoncurrentLeaseLiabilities" xlink:label="loc_ifrs-fullNoncurrentLeaseLiabilities" />
    <link:calculationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullLiabilities" xlink:to="loc_ifrs-fullNoncurrentLeaseLiabilities" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_Equity" xlink:label="loc_ifrs-fullEquity" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IssuedCapital" xlink:label="loc_ifrs-fullIssuedCapital" />
    <link:calculationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullEquity" xlink:to="loc_ifrs-fullIssuedCapital" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherReserves" xlink:label="loc_ifrs-fullOtherReserves" />
    <link:calculationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullEquity" xlink:to="loc_ifrs-fullOtherReserves" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_RetainedEarnings" xlink:label="loc_ifrs-fullRetainedEarnings" />
    <link:calculationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullEquity" xlink:to="loc_ifrs-fullRetainedEarnings" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_EquityAndLiabilities" xlink:label="loc_ifrs-fullEquityAndLiabilities" />
    <link:calculationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullEquityAndLiabilities" xlink:to="loc_ifrs-fullLiabilities" xlink:type="arc" weight="1" />
    <link:calculationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullEquityAndLiabilities" xlink:to="loc_ifrs-fullEquity" xlink:type="arc" weight="1" />
  </link:calculationLink>
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/StatementsOfNetLossAndComprehensiveLoss" xlink:title="000003 - Statement - Statements of Net Loss and Comprehensive Loss">
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_CostRecoveriesExpenses" xlink:label="loc_ahrCostRecoveriesExpenses" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdministrativeExpense" xlink:label="loc_ifrs-fullAdministrativeExpense" />
    <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrCostRecoveriesExpenses" xlink:to="loc_ifrs-fullAdministrativeExpense" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AuditorsRemunerationForAuditServices" xlink:label="loc_ifrs-fullAuditorsRemunerationForAuditServices" />
    <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrCostRecoveriesExpenses" xlink:to="loc_ifrs-fullAuditorsRemunerationForAuditServices" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_OfficeAndAdministrationsExpenses" xlink:label="loc_ahrOfficeAndAdministrationsExpenses" />
    <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrCostRecoveriesExpenses" xlink:to="loc_ahrOfficeAndAdministrationsExpenses" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_RentalExpense" xlink:label="loc_ifrs-fullRentalExpense" />
    <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrCostRecoveriesExpenses" xlink:to="loc_ifrs-fullRentalExpense" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CommunicationExpense" xlink:label="loc_ifrs-fullCommunicationExpense" />
    <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrCostRecoveriesExpenses" xlink:to="loc_ifrs-fullCommunicationExpense" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_TravelAndAccommodationExpenses" xlink:label="loc_ahrTravelAndAccommodationExpenses" />
    <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrCostRecoveriesExpenses" xlink:to="loc_ahrTravelAndAccommodationExpenses" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_TrustAndRegulatory" xlink:label="loc_ahrTrustAndRegulatory" />
    <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrCostRecoveriesExpenses" xlink:to="loc_ahrTrustAndRegulatory" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_EquitySettledShareBasedCompensation" xlink:label="loc_ahrEquitySettledShareBasedCompensation" />
    <link:calculationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrCostRecoveriesExpenses" xlink:to="loc_ahrEquitySettledShareBasedCompensation" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_IncomeLossBeforeOtherItems" xlink:label="loc_ahrIncomeLossBeforeOtherItems" />
    <link:calculationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrIncomeLossBeforeOtherItems" xlink:to="loc_ahrCostRecoveriesExpenses" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ExpenseArisingFromExplorationForAndEvaluationOfMineralResources" xlink:label="loc_ifrs-fullExpenseArisingFromExplorationForAndEvaluationOfMineralResources" />
    <link:calculationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrIncomeLossBeforeOtherItems" xlink:to="loc_ifrs-fullExpenseArisingFromExplorationForAndEvaluationOfMineralResources" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_ProfitLossNet" xlink:label="loc_ahrProfitLossNet" />
    <link:calculationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrProfitLossNet" xlink:to="loc_ahrIncomeLossBeforeOtherItems" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FinanceIncome" xlink:label="loc_ifrs-fullFinanceIncome" />
    <link:calculationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrProfitLossNet" xlink:to="loc_ifrs-fullFinanceIncome" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_AccretionExpenseOfficeLease" xlink:label="loc_ahrAccretionExpenseOfficeLease" />
    <link:calculationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrProfitLossNet" xlink:to="loc_ahrAccretionExpenseOfficeLease" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_InterestAndPenalties" xlink:label="loc_ahrInterestAndPenalties" />
    <link:calculationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrProfitLossNet" xlink:to="loc_ahrInterestAndPenalties" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherFeeAndCommissionIncome" xlink:label="loc_ifrs-fullOtherFeeAndCommissionIncome" />
    <link:calculationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrProfitLossNet" xlink:to="loc_ifrs-fullOtherFeeAndCommissionIncome" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdditionsToRightofuseAssets" xlink:label="loc_ifrs-fullAdditionsToRightofuseAssets" />
    <link:calculationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrProfitLossNet" xlink:to="loc_ifrs-fullAdditionsToRightofuseAssets" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_TransactionCostDirectorsLoans" xlink:label="loc_ahrTransactionCostDirectorsLoans" />
    <link:calculationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrProfitLossNet" xlink:to="loc_ahrTransactionCostDirectorsLoans" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_FlowThroughPremiumRecovery" xlink:label="loc_ahrFlowThroughPremiumRecovery" />
    <link:calculationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrProfitLossNet" xlink:to="loc_ahrFlowThroughPremiumRecovery" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ForeignExchangeLoss" xlink:label="loc_ifrs-fullForeignExchangeLoss" />
    <link:calculationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrProfitLossNet" xlink:to="loc_ifrs-fullForeignExchangeLoss" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_InterestExpenseDirectorsLoans" xlink:label="loc_ahrInterestExpenseDirectorsLoans" />
    <link:calculationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ahrProfitLossNet" xlink:to="loc_ahrInterestExpenseDirectorsLoans" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTax" xlink:label="loc_ifrs-fullOtherComprehensiveIncomeBeforeTax" />
    <link:calculationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullOtherComprehensiveIncomeBeforeTax" xlink:to="loc_ahrProfitLossNet" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_GainsOnChangeInFairValueOfDerivatives" xlink:label="loc_ifrs-fullGainsOnChangeInFairValueOfDerivatives" />
    <link:calculationArc order="23" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullOtherComprehensiveIncomeBeforeTax" xlink:to="loc_ifrs-fullGainsOnChangeInFairValueOfDerivatives" xlink:type="arc" weight="1" />
  </link:calculationLink>
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/StatementsOfChangesInDeficiencyEquity" xlink:title="000004 - Statement - Statements of Changes in (Deficiency) Equity" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/StatementsOfCashFlows" xlink:title="000005 - Statement - Statements of Cash Flows">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:label="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_NetIncomeLoss" xlink:label="loc_ahrNetIncomeLoss" />
    <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" xlink:to="loc_ahrNetIncomeLoss" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_AmortizationOfRightOfUseAsset" xlink:label="loc_ahrAmortizationOfRightOfUseAsset" />
    <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" xlink:to="loc_ahrAmortizationOfRightOfUseAsset" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_AdjustmentsForKeyManagementPersonnelCompensationSharebasedPayment" xlink:label="loc_ahrAdjustmentsForKeyManagementPersonnelCompensationSharebasedPayment" />
    <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" xlink:to="loc_ahrAdjustmentsForKeyManagementPersonnelCompensationSharebasedPayment" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_OfficeLeaseAccretionPerIfrs16" xlink:label="loc_ahrOfficeLeaseAccretionPerIfrs16" />
    <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" xlink:to="loc_ahrOfficeLeaseAccretionPerIfrs16" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_OfficeBaseRentRecordedAsLeaseReductionPerIfrs16" xlink:label="loc_ahrOfficeBaseRentRecordedAsLeaseReductionPerIfrs16" />
    <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" xlink:to="loc_ahrOfficeBaseRentRecordedAsLeaseReductionPerIfrs16" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_OfficeBaseRentRecordedAsLeaseReductionPerIfrs" xlink:label="loc_ahrOfficeBaseRentRecordedAsLeaseReductionPerIfrs" />
    <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" xlink:to="loc_ahrOfficeBaseRentRecordedAsLeaseReductionPerIfrs" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_AdjustmentsForDirectorsLoansInterestExpense" xlink:label="loc_ahrAdjustmentsForDirectorsLoansInterestExpense" />
    <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" xlink:to="loc_ahrAdjustmentsForDirectorsLoansInterestExpense" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_AdjustmentsForDirectorsLoansTransactionCost" xlink:label="loc_ahrAdjustmentsForDirectorsLoansTransactionCost" />
    <link:calculationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" xlink:to="loc_ahrAdjustmentsForDirectorsLoansTransactionCost" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:label="loc_ifrs-fullAdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" />
    <link:calculationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" xlink:to="loc_ifrs-fullAdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_AdjustmentsForIncreaseDecreaseInRestrictedCash" xlink:label="loc_ahrAdjustmentsForIncreaseDecreaseInRestrictedCash" />
    <link:calculationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" xlink:to="loc_ahrAdjustmentsForIncreaseDecreaseInRestrictedCash" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:label="loc_ifrs-fullAdjustmentsForDecreaseIncreaseInOtherCurrentAssets" />
    <link:calculationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" xlink:to="loc_ifrs-fullAdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_AdjustmentsForIncreaseDecreaseInAdvancedContributionsReceived" xlink:label="loc_ahrAdjustmentsForIncreaseDecreaseInAdvancedContributionsReceived" />
    <link:calculationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" xlink:to="loc_ahrAdjustmentsForIncreaseDecreaseInAdvancedContributionsReceived" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_AdjustmentsForIncreaseDecreaseInBalancesDueToRelatedParties" xlink:label="loc_ahrAdjustmentsForIncreaseDecreaseInBalancesDueToRelatedParties" />
    <link:calculationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" xlink:to="loc_ahrAdjustmentsForIncreaseDecreaseInBalancesDueToRelatedParties" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_AdjustmentFlowThroughPremiumRecovery" xlink:label="loc_ahrAdjustmentFlowThroughPremiumRecovery" />
    <link:calculationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" xlink:to="loc_ahrAdjustmentFlowThroughPremiumRecovery" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:label="loc_ifrs-fullCashFlowsFromUsedInFinancingActivities" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_NetProceedsFromIssuanceOfCommonSharesPursuantToAPrivatePlacement" xlink:label="loc_ahrNetProceedsFromIssuanceOfCommonSharesPursuantToAPrivatePlacement" />
    <link:calculationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInFinancingActivities" xlink:to="loc_ahrNetProceedsFromIssuanceOfCommonSharesPursuantToAPrivatePlacement" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashRepaymentsOfAdvancesAndLoansFromRelatedParties" xlink:label="loc_ifrs-fullCashRepaymentsOfAdvancesAndLoansFromRelatedParties" />
    <link:calculationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInFinancingActivities" xlink:to="loc_ifrs-fullCashRepaymentsOfAdvancesAndLoansFromRelatedParties" xlink:type="arc" weight="-1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_ProceedsFromExerciseOfSharePurchaseWarrants" xlink:label="loc_ahrProceedsFromExerciseOfSharePurchaseWarrants" />
    <link:calculationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInFinancingActivities" xlink:to="loc_ahrProceedsFromExerciseOfSharePurchaseWarrants" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_ProceedsFromOptionExercise" xlink:label="loc_ahrProceedsFromOptionExercise" />
    <link:calculationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullCashFlowsFromUsedInFinancingActivities" xlink:to="loc_ahrProceedsFromOptionExercise" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:label="loc_ifrs-fullIncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" />
    <link:calculationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullIncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:to="loc_ifrs-fullCashFlowsFromUsedInOperatingActivities" xlink:type="arc" weight="1" />
    <link:calculationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullIncreaseDecreaseInCashAndCashEquivalentsBeforeEffectOfExchangeRateChanges" xlink:to="loc_ifrs-fullCashFlowsFromUsedInFinancingActivities" xlink:type="arc" weight="1" />
  </link:calculationLink>
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/NatureAndContinuanceOfOperations" xlink:title="000006 - Disclosure - NATURE AND CONTINUANCE OF OPERATIONS" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/MaterialAccountingPolicies" xlink:title="000007 - Disclosure - MATERIAL ACCOUNTING POLICIES" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/CASH" xlink:title="000008 - Disclosure - CASH" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/MarketableSecurities" xlink:title="000009 - Disclosure - MARKETABLE SECURITIES" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/RestrictedCash" xlink:title="000010 - Disclosure - RESTRICTED CASH" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/AmountsReceivableAndOtherAssets" xlink:title="000011 - Disclosure - AMOUNTS RECEIVABLE AND OTHER ASSETS" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/ExplorationAndEvaluationExpensesAndCostRecoveries" xlink:title="000012 - Disclosure - EXPLORATION AND EVALUATION EXPENSES AND COST RECOVERIES" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/JointVentureCorporationAuroraMineralsLtd" xlink:title="000013 - Disclosure - JOINT VENTURE CORPORATION - AURORA MINERALS LTD" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/AccountsPayableAndAccruedLiabilities" xlink:title="000014 - Disclosure - ACCOUNTS PAYABLE AND ACCRUED LIABILITIES" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/DirectorsLoan" xlink:title="000015 - Disclosure - DIRECTORS LOAN" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/ShareCapitalAndReserves" xlink:title="000016 - Disclosure - SHARE CAPITAL AND RESERVES" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/RelatedPartyTransactions" xlink:title="000017 - Disclosure - RELATED PARTY TRANSACTIONS" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/SupplementaryInformationToTheStatementsOfNetLossAndComprehensiveLoss" xlink:title="000018 - Disclosure - SUPPLEMENTARY INFORMATION TO THE STATEMENTS OF NET LOSS AND COMPREHENSIVE LOSS" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/OfficeLeaseRightOfUseAssetAndLeaseLiability" xlink:title="000019 - Disclosure - OFFICE LEASE RIGHT OF USE ASSET AND LEASE LIABILITY" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/FinancialRiskManagement" xlink:title="000020 - Disclosure - FINANCIAL RISK MANAGEMENT" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/IncomeTaxes" xlink:title="000021 - Disclosure - INCOME TAXES" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/EventsAfterTheReportingPeriod" xlink:title="000022 - Disclosure - EVENTS AFTER THE REPORTING PERIOD" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/MaterialAccountingPoliciesPolicies" xlink:title="000023 - Disclosure - MATERIAL ACCOUNTING POLICIES (Policies)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/MaterialAccountingPoliciesTables" xlink:title="000024 - Disclosure - MATERIAL ACCOUNTING POLICIES (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/MarketableSecuritiesTables" xlink:title="000025 - Disclosure - MARKETABLE SECURITIES (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/RestrictedCashTables" xlink:title="000026 - Disclosure - RESTRICTED CASH (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/AmountsReceivableAndOtherAssetsTables" xlink:title="000027 - Disclosure - AMOUNTS RECEIVABLE AND OTHER ASSETS (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/ExplorationAndEvaluationExpensesAndCostRecoveriesTables" xlink:title="000028 - Disclosure - EXPLORATION AND EVALUATION EXPENSES AND COST RECOVERIES (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/JointVentureCorporationAuroraMineralsLtdTables" xlink:title="000029 - Disclosure - JOINT VENTURE CORPORATION - AURORA MINERALS LTD (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/AccountsPayableAndAccruedLiabilitiesTables" xlink:title="000030 - Disclosure - ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/DirectorsLoanTables" xlink:title="000031 - Disclosure - DIRECTORS LOAN (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/ShareCapitalAndReservesTables" xlink:title="000032 - Disclosure - SHARE CAPITAL AND RESERVES (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/RelatedPartyTransactionsTables" xlink:title="000033 - Disclosure - RELATED PARTY TRANSACTIONS (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/SupplementaryInformationToTheStatementsOfLossTables" xlink:title="000034 - Disclosure - SUPPLEMENTARY INFORMATION TO THE STATEMENTS OF LOSS (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/OfficeLeaseRightOfUseAssetAndLeaseLiabilityTables" xlink:title="000035 - Disclosure - OFFICE LEASE RIGHT OF USE ASSET AND LEASE LIABILITY (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/IncomeTaxesTables" xlink:title="000036 - Disclosure - INCOME TAXES (Tables)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/NatureAndContinuanceOfOperationsDetailsNarrative" xlink:title="000037 - Disclosure - NATURE AND CONTINUANCE OF OPERATIONS (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/MaterialAccountingPoliciesDetails" xlink:title="000038 - Disclosure - MATERIAL ACCOUNTING POLICIES (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/MaterialAccountingPoliciesDetailsNarrative" xlink:title="000039 - Disclosure - MATERIAL ACCOUNTING POLICIES (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/CashDetailsNarrative" xlink:title="000040 - Disclosure - CASH (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/MarketableSecuritiesDetails" xlink:title="000041 - Disclosure - MARKETABLE SECURITIES (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/MarketableSecuritiesDetailsNarrative" xlink:title="000042 - Disclosure - MARKETABLE SECURITIES (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/RestrictedCashDetails" xlink:title="000043 - Disclosure - RESTRICTED CASH (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/AmountsReceivableAndOtherAssetsDetails" xlink:title="000044 - Disclosure - AMOUNTS RECEIVABLE AND OTHER ASSETS (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/ExplorationAndEvaluationExpensesAndCostRecoveriesDetails" xlink:title="000045 - Disclosure - EXPLORATION AND EVALUATION EXPENSES AND COST RECOVERIES (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/ExplorationAndEvaluationExpensesAndCostRecoveriesDetailsNarrative" xlink:title="000046 - Disclosure - EXPLORATION AND EVALUATION EXPENSES AND COST RECOVERIES (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/JointVentureCorporationAuroraMineralsLtdDetails" xlink:title="000047 - Disclosure - JOINT VENTURE CORPORATION - AURORA MINERALS LTD. (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/JointVentureCorporationAuroraMineralsLtdDetailsNarrative" xlink:title="000048 - Disclosure - JOINT VENTURE CORPORATION - AURORA MINERALS LTD. (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/AccountsPayableAndAccruedLiabilitiesDetails" xlink:title="000049 - Disclosure - ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/DirectorsLoanDetails" xlink:title="000050 - Disclosure - DIRECTORS LOAN (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/DirectorsLoanDetails1" xlink:title="000051 - Disclosure - DIRECTORS LOAN (Details 1)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/DirectorsLoanDetails2" xlink:title="000052 - Disclosure - DIRECTORS LOAN (Details 2)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/DirectorsLoanDetailsNarrative" xlink:title="000053 - Disclosure - DIRECTORS LOAN (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/ShareCapitalAndReservesDetails" xlink:title="000054 - Disclosure - SHARE CAPITAL AND RESERVES (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/ShareCapitalAndReservesDetails1" xlink:title="000055 - Disclosure - SHARE CAPITAL AND RESERVES (Details 1)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/ShareCapitalAndReservesDetails2" xlink:title="000056 - Disclosure - SHARE CAPITAL AND RESERVES (Details 2)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/ShareCapitalAndReservesDetails3" xlink:title="000057 - Disclosure - SHARE CAPITAL AND RESERVES (Details 3)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/ShareCapitalAndReservesDetails4" xlink:title="000058 - Disclosure - SHARE CAPITAL AND RESERVES (Details 4)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/ShareCapitalAndReservesDetailsNarrative" xlink:title="000059 - Disclosure - SHARE CAPITAL AND RESERVES (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/RelatedPartyTransactionsDetails" xlink:title="000060 - Disclosure - RELATED PARTY TRANSACTIONS (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/RelatedPartyTransactionsDetails1" xlink:title="000061 - Disclosure - RELATED PARTY TRANSACTIONS (Details 1)">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AmountIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntity" xlink:label="loc_ifrs-fullAmountIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntity" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ServicesReceivedRelatedPartyTransactions" xlink:label="loc_ifrs-fullServicesReceivedRelatedPartyTransactions" />
    <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullAmountIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntity" xlink:to="loc_ifrs-fullServicesReceivedRelatedPartyTransactions" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_InformationTechnologyInfrastructureAndSupportServices" xlink:label="loc_ahrInformationTechnologyInfrastructureAndSupportServices" />
    <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullAmountIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntity" xlink:to="loc_ahrInformationTechnologyInfrastructureAndSupportServices" xlink:type="arc" weight="1" />
    <link:loc xlink:type="locator" xlink:href="ahr-20260331.xsd#ahr_ReimbursementOfThirdpartyExpenses" xlink:label="loc_ahrReimbursementOfThirdpartyExpenses" />
    <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_ifrs-fullAmountIncurredByEntityForProvisionOfKeyManagementPersonnelServicesProvidedBySeparateManagementEntity" xlink:to="loc_ahrReimbursementOfThirdpartyExpenses" xlink:type="arc" weight="1" />
  </link:calculationLink>
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/RelatedPartyTransactionsDetailsNarrative" xlink:title="000062 - Disclosure - RELATED PARTY TRANSACTIONS (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/SupplementaryInformationToTheStatementsOfLossDetails" xlink:title="000063 - Disclosure - SUPPLEMENTARY INFORMATION TO THE STATEMENTS OF LOSS (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/SupplementaryInformationToTheStatementsOfLossDetails1" xlink:title="000064 - Disclosure - SUPPLEMENTARY INFORMATION TO THE STATEMENTS OF LOSS (Details 1)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/OfficeLeaseRightOfUseAssetAndLeaseLiabilityDetails" xlink:title="000065 - Disclosure - OFFICE LEASE RIGHT OF USE ASSET AND LEASE LIABILITY (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/OfficeLeaseRightOfUseAssetAndLeaseLiabilityDetails1" xlink:title="000066 - Disclosure - OFFICE LEASE RIGHT OF USE ASSET AND LEASE LIABILITY (Details 1)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/OfficeLeaseRightOfUseAssetAndLeaseLiabilityDetails2" xlink:title="000067 - Disclosure - OFFICE LEASE RIGHT OF USE ASSET AND LEASE LIABILITY (Details 2)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/OfficeLeaseRightOfUseAssetAndLeaseLiabilityDetailsNarrative" xlink:title="000068 - Disclosure - OFFICE LEASE RIGHT OF USE ASSET AND LEASE LIABILITY (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/IncomeTaxesDetails" xlink:title="000069 - Disclosure - INCOME TAXES (Details)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/IncomeTaxesDetails1" xlink:title="000070 - Disclosure - INCOME TAXES (Details 1)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/IncomeTaxesDetailsNarrative" xlink:title="000071 - Disclosure - INCOME TAXES (Details Narrative)" />
  <link:calculationLink xlink:type="extended" xlink:role="http://ahr.com/role/EventsAfterTheReportingPeriodDetailsNarrative" xlink:title="000072 - Disclosure - EVENTS AFTER THE REPORTING PERIOD (Details Narrative)" />
</link:linkbase>
