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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019cb098-ac1e-7176-a7cb-cd310411fd67,g:59c8fc0f-fe04-4713-997c-d9b23560f697-->
<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.kniferiver.com/role/ConsolidatedStatementsofOperations" xlink:type="simple" xlink:href="knf-20260331.xsd#ConsolidatedStatementsofOperations"/>
  <link:calculationLink xlink:role="http://www.kniferiver.com/role/ConsolidatedStatementsofOperations" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cb098-ae0f-7d59-99d5-97234852ba3b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019dba80-f30d-7812-9a4f-5b4108d9f999" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019cb098-ae0f-7d59-99d5-97234852ba3b" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019dba80-f30d-7812-9a4f-5b4108d9f999" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019cb098-ae0f-7373-a687-0fb0d3a17fc8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019cb098-ae0f-7d59-99d5-97234852ba3b" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019cb098-ae0f-7373-a687-0fb0d3a17fc8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019d0575-62e8-77fe-a873-aae0c015e0e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019d0575-62e8-7650-9d8b-d32711fdd9f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019d0575-62e8-77fe-a873-aae0c015e0e8" xlink:to="loc_us-gaap_OperatingIncomeLoss_019d0575-62e8-7650-9d8b-d32711fdd9f4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_019d0575-62e8-7e9a-a51a-282842be8df7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019d0575-62e8-77fe-a873-aae0c015e0e8" xlink:to="loc_us-gaap_InterestExpenseNonoperating_019d0575-62e8-7e9a-a51a-282842be8df7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019d0575-62e8-7b52-bb03-00ebe910e4c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019d0575-62e8-77fe-a873-aae0c015e0e8" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019d0575-62e8-7b52-bb03-00ebe910e4c1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019cb098-ae0f-72c0-94f2-48b114cc9191" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019cb098-ae0f-72d7-8f0e-51ea68aedc1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_019cb098-ae0f-72c0-94f2-48b114cc9191" xlink:to="loc_us-gaap_Revenues_019cb098-ae0f-72d7-8f0e-51ea68aedc1d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_019cb098-ae0f-7d16-8f52-b692574391e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfRevenue"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_019cb098-ae0f-72c0-94f2-48b114cc9191" xlink:to="loc_us-gaap_CostOfRevenue_019cb098-ae0f-7d16-8f52-b692574391e7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019cb098-ae0f-79dc-82ab-3ad1c8afbd59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019cb098-ae0f-7eba-91fb-c182363293bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossProfit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019cb098-ae0f-79dc-82ab-3ad1c8afbd59" xlink:to="loc_us-gaap_GrossProfit_019cb098-ae0f-7eba-91fb-c182363293bd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019cb098-ae0f-731f-ab7b-053b8d4fc394" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019cb098-ae0f-79dc-82ab-3ad1c8afbd59" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019cb098-ae0f-731f-ab7b-053b8d4fc394" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.kniferiver.com/role/ConsolidatedStatementsofComprehensiveIncome" xlink:type="simple" xlink:href="knf-20260331.xsd#ConsolidatedStatementsofComprehensiveIncome"/>
  <link:calculationLink xlink:role="http://www.kniferiver.com/role/ConsolidatedStatementsofComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_019cb098-ae0f-757b-87b0-82d3401faaa5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cb098-ae0f-76aa-8991-15d268f3fd43" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_019cb098-ae0f-757b-87b0-82d3401faaa5" xlink:to="loc_us-gaap_NetIncomeLoss_019cb098-ae0f-76aa-8991-15d268f3fd43" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019cb098-ae0f-7e35-8a51-5cf490a476fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_019cb098-ae0f-757b-87b0-82d3401faaa5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019cb098-ae0f-7e35-8a51-5cf490a476fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_019cb098-ae0f-79d1-80b6-cb8700c15fc4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_019cb098-ae0f-7818-8239-4aac652d1e84" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_019cb098-ae0f-79d1-80b6-cb8700c15fc4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_019cb098-ae0f-7818-8239-4aac652d1e84" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019d0579-2e5d-73da-ac7c-b6a63829d40c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_019d0579-2e5d-71d9-8e3a-762f43882122" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019d0579-2e5d-73da-ac7c-b6a63829d40c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_019d0579-2e5d-71d9-8e3a-762f43882122" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.kniferiver.com/role/ConsolidatedBalanceSheets" xlink:type="simple" xlink:href="knf-20260331.xsd#ConsolidatedBalanceSheets"/>
  <link:calculationLink xlink:role="http://www.kniferiver.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019cb098-ae0f-75bc-867b-3567ac9ebc4a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonValue_019cb098-ae0f-7c60-bcce-d4d6452ce030" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonValue"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019cb098-ae0f-75bc-867b-3567ac9ebc4a" xlink:to="loc_us-gaap_TreasuryStockCommonValue_019cb098-ae0f-7c60-bcce-d4d6452ce030" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019cb098-ae0f-7952-8937-c885a8106bb7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019cb098-ae0f-75bc-867b-3567ac9ebc4a" xlink:to="loc_us-gaap_CommonStockValue_019cb098-ae0f-7952-8937-c885a8106bb7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_019cb098-ae0f-72af-8156-dde83a5833f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019cb098-ae0f-75bc-867b-3567ac9ebc4a" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_019cb098-ae0f-72af-8156-dde83a5833f1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019cb098-ae0f-74ec-9818-7ba7c869b5e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019cb098-ae0f-75bc-867b-3567ac9ebc4a" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019cb098-ae0f-74ec-9818-7ba7c869b5e4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019cb098-ae0f-7c4e-ad56-428ae7417cfb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019cb098-ae0f-75bc-867b-3567ac9ebc4a" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019cb098-ae0f-7c4e-ad56-428ae7417cfb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019cb098-ae0f-7991-9cec-d90931826de3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxesPayableCurrent_019cb098-ae0f-7e3b-ad8b-412a95e5aec0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxesPayableCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019cb098-ae0f-7991-9cec-d90931826de3" xlink:to="loc_us-gaap_TaxesPayableCurrent_019cb098-ae0f-7e3b-ad8b-412a95e5aec0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019cb098-ae0f-77da-8eda-237488a0c78d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019cb098-ae0f-7991-9cec-d90931826de3" xlink:to="loc_us-gaap_AccountsPayableCurrent_019cb098-ae0f-77da-8eda-237488a0c78d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_019cb098-ae0f-7a75-adc0-524e9a5b80d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019cb098-ae0f-7991-9cec-d90931826de3" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_019cb098-ae0f-7a75-adc0-524e9a5b80d4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent_019cb098-ae0f-709a-a6a4-8bd0dd62a524" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019cb098-ae0f-7991-9cec-d90931826de3" xlink:to="loc_us-gaap_InterestPayableCurrent_019cb098-ae0f-709a-a6a4-8bd0dd62a524" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_019cb098-ae0f-70f3-835b-4d5b14ce0c6f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019cb098-ae0f-7991-9cec-d90931826de3" xlink:to="loc_us-gaap_LongTermDebtCurrent_019cb098-ae0f-70f3-835b-4d5b14ce0c6f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019cb098-ae0f-7f40-99fa-683a330d8065" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019cb098-ae0f-7991-9cec-d90931826de3" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019cb098-ae0f-7f40-99fa-683a330d8065" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_019cb098-ae0f-7eaf-b567-c96c0f3b09d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019cb098-ae0f-7991-9cec-d90931826de3" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_019cb098-ae0f-7eaf-b567-c96c0f3b09d9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_019cb098-ae0f-774e-9360-fd60d49b4b72" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019cb098-ae0f-7991-9cec-d90931826de3" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_019cb098-ae0f-774e-9360-fd60d49b4b72" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019cb098-ae0f-7a68-9b46-b6de01f878c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_019cb098-ae0f-7350-a7af-7eeba1bc8729" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019cb098-ae0f-7a68-9b46-b6de01f878c1" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_019cb098-ae0f-7350-a7af-7eeba1bc8729" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_019cb098-ae0f-764f-89cd-7d7123b6f2d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019cb098-ae0f-7a68-9b46-b6de01f878c1" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_019cb098-ae0f-764f-89cd-7d7123b6f2d6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019cb098-ae0f-7ec1-b7e5-ab53c93f73ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019cb098-ae0f-7a68-9b46-b6de01f878c1" xlink:to="loc_us-gaap_LiabilitiesCurrent_019cb098-ae0f-7ec1-b7e5-ab53c93f73ef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_019cb098-ae0f-7740-93c7-df726d72e8ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019cb098-ae0f-7a68-9b46-b6de01f878c1" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_019cb098-ae0f-7740-93c7-df726d72e8ba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019cb098-ae0f-76db-b7d4-64533525aa2d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019cb098-ae0f-7a68-9b46-b6de01f878c1" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019cb098-ae0f-76db-b7d4-64533525aa2d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019cb098-ae0f-7c01-bfdf-296ff96c4e80" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019cb098-ae0f-793a-b946-df764cf51b88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019cb098-ae0f-7c01-bfdf-296ff96c4e80" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019cb098-ae0f-793a-b946-df764cf51b88" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_019cb098-ae0f-7fa6-adaf-024f8538859c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019cb098-ae0f-7c01-bfdf-296ff96c4e80" xlink:to="loc_us-gaap_OtherAssetsCurrent_019cb098-ae0f-7fa6-adaf-024f8538859c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_019cb098-ae0f-7648-b853-43198503de3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019cb098-ae0f-7c01-bfdf-296ff96c4e80" xlink:to="loc_us-gaap_InventoryNet_019cb098-ae0f-7648-b853-43198503de3e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetCurrent_019cb098-ae0f-7fdd-8eb8-dbe062ded357" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerAssetNetCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019cb098-ae0f-7c01-bfdf-296ff96c4e80" xlink:to="loc_us-gaap_ContractWithCustomerAssetNetCurrent_019cb098-ae0f-7fdd-8eb8-dbe062ded357" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesNetCurrent_019cb098-ae0f-7088-b1b8-5b406ae13235" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivablesNetCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019cb098-ae0f-7c01-bfdf-296ff96c4e80" xlink:to="loc_us-gaap_ReceivablesNetCurrent_019cb098-ae0f-7088-b1b8-5b406ae13235" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019cb098-ae0f-7feb-a114-2361f6730907" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNoncurrent_019cb098-ae0f-7950-96b0-c74af26f65b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019cb098-ae0f-7feb-a114-2361f6730907" xlink:to="loc_us-gaap_AssetsNoncurrent_019cb098-ae0f-7950-96b0-c74af26f65b1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019cb098-ae0f-70c7-b52e-d3b5d3e8506d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019cb098-ae0f-7feb-a114-2361f6730907" xlink:to="loc_us-gaap_AssetsCurrent_019cb098-ae0f-70c7-b52e-d3b5d3e8506d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019cb098-ae0f-7372-a146-74d475fa435a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019cb098-ae0f-7b6e-a11b-a37d91343f1c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019cb098-ae0f-7372-a146-74d475fa435a" xlink:to="loc_us-gaap_Liabilities_019cb098-ae0f-7b6e-a11b-a37d91343f1c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_019cb098-ae0f-7e87-b202-abc3e6f66cb4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019cb098-ae0f-7372-a146-74d475fa435a" xlink:to="loc_us-gaap_CommitmentsAndContingencies_019cb098-ae0f-7e87-b202-abc3e6f66cb4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019cb098-ae0f-7c2e-af58-b420d570d9d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019cb098-ae0f-7372-a146-74d475fa435a" xlink:to="loc_us-gaap_StockholdersEquity_019cb098-ae0f-7c2e-af58-b420d570d9d9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNoncurrent_019cb098-ae0f-767d-88c8-de52ce712805" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019cb098-ae0f-7f46-973c-86f1e44a01df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_019cb098-ae0f-767d-88c8-de52ce712805" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019cb098-ae0f-7f46-973c-86f1e44a01df" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019cb098-ae0f-7dca-97aa-e978f5e90be3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_019cb098-ae0f-767d-88c8-de52ce712805" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019cb098-ae0f-7dca-97aa-e978f5e90be3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019cb098-ae0f-798a-b5c0-ca40a51d9a0d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_019cb098-ae0f-767d-88c8-de52ce712805" xlink:to="loc_us-gaap_Goodwill_019cb098-ae0f-798a-b5c0-ca40a51d9a0d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019cb098-ae0f-7592-8a35-266c3d4ab4de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_019cb098-ae0f-767d-88c8-de52ce712805" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019cb098-ae0f-7592-8a35-266c3d4ab4de" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019cb098-ae0f-7cd3-8731-7d4bed8373f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_019cb098-ae0f-767d-88c8-de52ce712805" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019cb098-ae0f-7cd3-8731-7d4bed8373f4" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.kniferiver.com/role/ConsolidatedStatementsofCashFlows" xlink:type="simple" xlink:href="knf-20260331.xsd#ConsolidatedStatementsofCashFlows"/>
  <link:calculationLink xlink:role="http://www.kniferiver.com/role/ConsolidatedStatementsofCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019cb098-ae0f-70e7-86f1-6725359cc135" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_019cb098-ae0f-7c4d-a7c1-aa91932fb095" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019cb098-ae0f-70e7-86f1-6725359cc135" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_019cb098-ae0f-7c4d-a7c1-aa91932fb095" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_019cb098-ae0f-76f5-b8f9-552d339a11a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019cb098-ae0f-70e7-86f1-6725359cc135" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_019cb098-ae0f-76f5-b8f9-552d339a11a3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_019cb098-ae0f-7a20-bd95-6f33c7b01dc0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleOfProductiveAssets"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019cb098-ae0f-70e7-86f1-6725359cc135" xlink:to="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_019cb098-ae0f-7a20-bd95-6f33c7b01dc0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromInvestments_019cb098-ae0f-7daa-9ed3-43f270074190" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForProceedsFromInvestments"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019cb098-ae0f-70e7-86f1-6725359cc135" xlink:to="loc_us-gaap_PaymentsForProceedsFromInvestments_019cb098-ae0f-7daa-9ed3-43f270074190" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_019cb098-ae0f-7db5-92bf-5fd39fd24719" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-7953-89e7-fba5ded3045e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_019cb098-ae0f-7db5-92bf-5fd39fd24719" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-7953-89e7-fba5ded3045e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019cb098-ae0f-70a6-a343-51f35288661b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_019cb098-ae0f-7db5-92bf-5fd39fd24719" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019cb098-ae0f-70a6-a343-51f35288661b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb098-ae0f-7361-9032-56bcb39c12a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_019cb098-ae0f-7db5-92bf-5fd39fd24719" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb098-ae0f-7361-9032-56bcb39c12a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets1_019cb098-ae0f-73f6-8aeb-b1c52bc21a57" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnDispositionOfAssets1"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets1_019cb098-ae0f-73f6-8aeb-b1c52bc21a57" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_knf_EquityInResultsOfOperationsFromUnconsolidatedAffiliates_019cb098-ae0f-7893-a8b5-a55ad597b545" xlink:href="knf-20260331.xsd#knf_EquityInResultsOfOperationsFromUnconsolidatedAffiliates"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_knf_EquityInResultsOfOperationsFromUnconsolidatedAffiliates_019cb098-ae0f-7893-a8b5-a55ad597b545" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableTrade_019cb098-ae0f-7277-877e-d2ba5258940a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayableTrade"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableTrade_019cb098-ae0f-7277-877e-d2ba5258940a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_019cb098-ae0f-71f3-9fb1-12010edf1f98" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_019cb098-ae0f-71f3-9fb1-12010edf1f98" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_019cb098-ae0f-7e81-ba4a-d779c5a3d7a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_019cb098-ae0f-7e81-ba4a-d779c5a3d7a6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_019cb098-ae0f-7f5e-8e6e-5bf1af47db3a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_019cb098-ae0f-7f5e-8e6e-5bf1af47db3a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_019cb098-ae0f-7700-b4c4-511ce8e181b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherCurrentLiabilities"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentLiabilities_019cb098-ae0f-7700-b4c4-511ce8e181b8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_019cb098-ae0f-760e-b702-240b4f4c2113" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_019cb098-ae0f-760e-b702-240b4f4c2113" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash_019cb098-ae0f-76ea-912a-12c8bdb6e4b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash_019cb098-ae0f-76ea-912a-12c8bdb6e4b5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_019cb098-ae0f-7a29-b945-9461b90e935f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_ShareBasedCompensation_019cb098-ae0f-7a29-b945-9461b90e935f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments_019cb098-ae0f-7d06-8cad-5d6a0f4e588d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnInvestments"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_UnrealizedGainLossOnInvestments_019cb098-ae0f-7d06-8cad-5d6a0f4e588d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_019cb098-ae0f-76a3-b312-b3198aa359f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:calculationArc order="12" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_019cb098-ae0f-76a3-b312-b3198aa359f0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_019cb098-ae0f-7f44-b397-99912711c0fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount"/>
    <link:calculationArc order="13" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_019cb098-ae0f-7f44-b397-99912711c0fa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019cb098-ae0f-70f6-ac85-7475b490b34b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019cb098-ae0f-70f6-ac85-7475b490b34b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cb098-ae0f-78af-ae19-d74df00b5344" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_NetIncomeLoss_019cb098-ae0f-78af-ae19-d74df00b5344" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsAndNotesReceivable_019cb098-ae0f-7164-88c0-8036e36444f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsAndNotesReceivable"/>
    <link:calculationArc order="16" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsAndNotesReceivable_019cb098-ae0f-7164-88c0-8036e36444f4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_019cb098-ae0f-7162-b215-00519119032e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_019cb098-ae0f-7162-b215-00519119032e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitContributions_019cb098-ae0f-7e1e-8e31-17eb94771b43" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PensionAndOtherPostretirementBenefitContributions"/>
    <link:calculationArc order="18" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019cb098-ae0f-790b-b43e-0ba79d19ec6d" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitContributions_019cb098-ae0f-7e1e-8e31-17eb94771b43" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb098-ae0f-7d2c-a637-03b98a9f32b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_019cb098-ae0f-7369-935c-0b79739da048" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb098-ae0f-7d2c-a637-03b98a9f32b4" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_019cb098-ae0f-7369-935c-0b79739da048" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_019cb098-ae0f-7f4c-be18-b83170c929f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb098-ae0f-7d2c-a637-03b98a9f32b4" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_019cb098-ae0f-7f4c-be18-b83170c929f6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_019cb098-ae0f-775c-8617-4fac41d82d47" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb098-ae0f-7d2c-a637-03b98a9f32b4" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_019cb098-ae0f-775c-8617-4fac41d82d47" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_019cb098-ae0f-7102-a554-1a7745e86eef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019cb098-ae0f-7d2c-a637-03b98a9f32b4" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_019cb098-ae0f-7102-a554-1a7745e86eef" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.kniferiver.com/role/BasisofPresentationScheduleofCashandCashEquivalentsDetails" xlink:type="simple" xlink:href="knf-20260331.xsd#BasisofPresentationScheduleofCashandCashEquivalentsDetails"/>
  <link:calculationLink xlink:role="http://www.kniferiver.com/role/BasisofPresentationScheduleofCashandCashEquivalentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019cb098-ae0f-7331-bd96-d2124f0abf00" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019cb098-ae0f-7f24-acfd-ec1c588f56f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019cb098-ae0f-7331-bd96-d2124f0abf00" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019cb098-ae0f-7f24-acfd-ec1c588f56f0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCash_019cb098-ae0f-7095-84f7-917d5dc49c82" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCash"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019cb098-ae0f-7331-bd96-d2124f0abf00" xlink:to="loc_us-gaap_RestrictedCash_019cb098-ae0f-7095-84f7-917d5dc49c82" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.kniferiver.com/role/ReceivablesandAllowanceforExpectedCreditLossesScheduleofReceivablesDetails" xlink:type="simple" xlink:href="knf-20260331.xsd#ReceivablesandAllowanceforExpectedCreditLossesScheduleofReceivablesDetails"/>
  <link:calculationLink xlink:role="http://www.kniferiver.com/role/ReceivablesandAllowanceforExpectedCreditLossesScheduleofReceivablesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_019cb098-ae0f-7bcc-8ae4-20776042b081" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_019cb098-ae0f-773c-b7dc-3c020775d1eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableNet_019cb098-ae0f-7bcc-8ae4-20776042b081" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_019cb098-ae0f-773c-b7dc-3c020775d1eb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGross_019cb098-ae0f-7b75-80f3-71ce59a971e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableGross"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableNet_019cb098-ae0f-7bcc-8ae4-20776042b081" xlink:to="loc_us-gaap_AccountsReceivableGross_019cb098-ae0f-7b75-80f3-71ce59a971e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGross_019cb098-ae0f-7ab6-b231-22d95a0b7706" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndOtherReceivablesNetCurrent_019cb098-ae0f-7395-ae1e-c4819ac2d1f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsAndOtherReceivablesNetCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableGross_019cb098-ae0f-7ab6-b231-22d95a0b7706" xlink:to="loc_us-gaap_AccountsAndOtherReceivablesNetCurrent_019cb098-ae0f-7395-ae1e-c4819ac2d1f6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BilledContractReceivables_019cb098-ae0f-7235-abb6-2a4144f2be83" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BilledContractReceivables"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableGross_019cb098-ae0f-7ab6-b231-22d95a0b7706" xlink:to="loc_us-gaap_BilledContractReceivables_019cb098-ae0f-7235-abb6-2a4144f2be83" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.kniferiver.com/role/InventoriesDetails" xlink:type="simple" xlink:href="knf-20260331.xsd#InventoriesDetails"/>
  <link:calculationLink xlink:role="http://www.kniferiver.com/role/InventoriesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_019cb098-ae0f-7743-9f08-3f5423799700" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRawMaterials_019cb098-ae0f-740f-86b1-267e0ba009fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryRawMaterials"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_019cb098-ae0f-7743-9f08-3f5423799700" xlink:to="loc_us-gaap_InventoryRawMaterials_019cb098-ae0f-740f-86b1-267e0ba009fd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryFinishedGoods_019cb098-ae0f-711b-9579-92f3eb28334e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryFinishedGoods"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_019cb098-ae0f-7743-9f08-3f5423799700" xlink:to="loc_us-gaap_InventoryFinishedGoods_019cb098-ae0f-711b-9579-92f3eb28334e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInventorySupplies_019cb098-ae0f-7d9a-b5ba-e4a03cdf76ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherInventorySupplies"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_019cb098-ae0f-7743-9f08-3f5423799700" xlink:to="loc_us-gaap_OtherInventorySupplies_019cb098-ae0f-7d9a-b5ba-e4a03cdf76ab" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.kniferiver.com/role/NetLossPerShareDetails" xlink:type="simple" xlink:href="knf-20260331.xsd#NetLossPerShareDetails"/>
  <link:calculationLink xlink:role="http://www.kniferiver.com/role/NetLossPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cb098-ae0f-74f4-b9d8-c202b2cf7c9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cb098-ae0f-7570-8c7e-527e112fb7bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cb098-ae0f-74f4-b9d8-c202b2cf7c9e" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cb098-ae0f-7570-8c7e-527e112fb7bc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_019cb098-ae0f-75a3-a8ed-543c1f94c4af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cb098-ae0f-74f4-b9d8-c202b2cf7c9e" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_019cb098-ae0f-75a3-a8ed-543c1f94c4af" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.kniferiver.com/role/UncompletedContractsScheduleofChangesinContractAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="knf-20260331.xsd#UncompletedContractsScheduleofChangesinContractAssetsandLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.kniferiver.com/role/UncompletedContractsScheduleofChangesinContractAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_knf_ContractWithCustomerAssetsAndLiabilitiesNetCurrentChange_019cb098-ae0f-77eb-9bfc-f67e3b314359" xlink:href="knf-20260331.xsd#knf_ContractWithCustomerAssetsAndLiabilitiesNetCurrentChange"/>
    <link:loc xlink:type="locator" xlink:label="loc_knf_ContractwithCustomerAssetNetCurrentChange_019cb098-ae0f-7b68-9201-f9d8a61386c2" xlink:href="knf-20260331.xsd#knf_ContractwithCustomerAssetNetCurrentChange"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_knf_ContractWithCustomerAssetsAndLiabilitiesNetCurrentChange_019cb098-ae0f-77eb-9bfc-f67e3b314359" xlink:to="loc_knf_ContractwithCustomerAssetNetCurrentChange_019cb098-ae0f-7b68-9201-f9d8a61386c2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_knf_ContractwithCustomerLiabilityCurrentChange_019cb098-ae0f-730e-b601-1638d1ff9e6c" xlink:href="knf-20260331.xsd#knf_ContractwithCustomerLiabilityCurrentChange"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_knf_ContractWithCustomerAssetsAndLiabilitiesNetCurrentChange_019cb098-ae0f-77eb-9bfc-f67e3b314359" xlink:to="loc_knf_ContractwithCustomerLiabilityCurrentChange_019cb098-ae0f-730e-b601-1638d1ff9e6c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_knf_ContractWithCustomerAssetsAndLiabilitiesCurrentNet_019cb098-ae0f-79f2-86dd-4a6db5e076d9" xlink:href="knf-20260331.xsd#knf_ContractWithCustomerAssetsAndLiabilitiesCurrentNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019cb098-ae0f-7cd9-8d59-bdd72109ac4a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_knf_ContractWithCustomerAssetsAndLiabilitiesCurrentNet_019cb098-ae0f-79f2-86dd-4a6db5e076d9" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019cb098-ae0f-7cd9-8d59-bdd72109ac4a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetCurrent_019cb098-ae0f-7766-ae6c-8e91a3e84e71" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerAssetNetCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_knf_ContractWithCustomerAssetsAndLiabilitiesCurrentNet_019cb098-ae0f-79f2-86dd-4a6db5e076d9" xlink:to="loc_us-gaap_ContractWithCustomerAssetNetCurrent_019cb098-ae0f-7766-ae6c-8e91a3e84e71" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.kniferiver.com/role/GoodwillandOtherIntangibleAssetsScheduleofOtherAmortizableIntangibleAssetsDetails" xlink:type="simple" xlink:href="knf-20260331.xsd#GoodwillandOtherIntangibleAssetsScheduleofOtherAmortizableIntangibleAssetsDetails"/>
  <link:calculationLink xlink:role="http://www.kniferiver.com/role/GoodwillandOtherIntangibleAssetsScheduleofOtherAmortizableIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019cb098-ae0f-78f2-b65f-a953a4a2eee3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019cb098-ae0f-72bf-a47e-44b993a27409" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019cb098-ae0f-78f2-b65f-a953a4a2eee3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019cb098-ae0f-72bf-a47e-44b993a27409" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019cb098-ae0f-7a3e-a641-0abffac53787" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019cb098-ae0f-78f2-b65f-a953a4a2eee3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019cb098-ae0f-7a3e-a641-0abffac53787" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.kniferiver.com/role/FairValueMeasurementsScheduleofAssetsMeasuredatFairValueonaRecurringBasisDetails" xlink:type="simple" xlink:href="knf-20260331.xsd#FairValueMeasurementsScheduleofAssetsMeasuredatFairValueonaRecurringBasisDetails"/>
  <link:calculationLink xlink:role="http://www.kniferiver.com/role/FairValueMeasurementsScheduleofAssetsMeasuredatFairValueonaRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019cb098-ae0f-7488-9987-91c3bc585341" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashSurrenderValueFairValueDisclosure_019cb098-ae0f-7ca2-9b5e-d0596b6237e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashSurrenderValueFairValueDisclosure"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_019cb098-ae0f-7488-9987-91c3bc585341" xlink:to="loc_us-gaap_CashSurrenderValueFairValueDisclosure_019cb098-ae0f-7ca2-9b5e-d0596b6237e7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsAtCarryingValue_019cb098-ae0f-7580-8040-46969e574ae3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MoneyMarketFundsAtCarryingValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_019cb098-ae0f-7488-9987-91c3bc585341" xlink:to="loc_us-gaap_MoneyMarketFundsAtCarryingValue_019cb098-ae0f-7580-8040-46969e574ae3" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.kniferiver.com/role/DebtScheduleofLongTermDebtOutstandingDetails" xlink:type="simple" xlink:href="knf-20260331.xsd#DebtScheduleofLongTermDebtOutstandingDetails"/>
  <link:calculationLink xlink:role="http://www.kniferiver.com/role/DebtScheduleofLongTermDebtOutstandingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019cb098-aeb7-7936-b70f-a9bc8bdb501b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019cb098-aeb7-720f-9410-1682d0a9de31" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_019cb098-aeb7-7936-b70f-a9bc8bdb501b" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019cb098-aeb7-720f-9410-1682d0a9de31" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_019cb098-aeb7-7f4f-9747-4002c7f7d781" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_019cb098-aeb7-7936-b70f-a9bc8bdb501b" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_019cb098-aeb7-7f4f-9747-4002c7f7d781" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.kniferiver.com/role/DebtScheduleofLongTermDebtOutstandingDetails_1" xlink:type="simple" xlink:href="knf-20260331.xsd#DebtScheduleofLongTermDebtOutstandingDetails_1"/>
  <link:calculationLink xlink:role="http://www.kniferiver.com/role/DebtScheduleofLongTermDebtOutstandingDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019cb098-aeb7-7b5e-931d-5f143763fa22" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_019cb098-aeb7-7462-8f8c-dbd13d5d9d12" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_019cb098-aeb7-7b5e-931d-5f143763fa22" xlink:to="loc_us-gaap_LongTermDebtCurrent_019cb098-aeb7-7462-8f8c-dbd13d5d9d12" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_019cb098-aeb7-7f4a-b9b4-8761c696e513" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_019cb098-aeb7-7b5e-931d-5f143763fa22" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_019cb098-aeb7-7f4a-b9b4-8761c696e513" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
