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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e64e3-647b-7cc7-8c16-d2251d2febcd,g:1c2284ce-094e-4b53-aee9-a3f92a2a5fda-->
<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.nationalfuelgas.com/role/ConsolidatedStatementsOfIncomeAndEarningsReinvestedInTheBusinessUnaudited" xlink:type="simple" xlink:href="nfg-20260630.xsd#ConsolidatedStatementsOfIncomeAndEarningsReinvestedInTheBusinessUnaudited"/>
  <link:calculationLink xlink:role="http://www.nationalfuelgas.com/role/ConsolidatedStatementsOfIncomeAndEarningsReinvestedInTheBusinessUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e64e3-67d9-7be8-8b5c-33e8f57a1423" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019e64e3-67d9-7af2-ac07-6065fc2ea483" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.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_019e64e3-67d9-7be8-8b5c-33e8f57a1423" xlink:to="loc_us-gaap_OperatingIncomeLoss_019e64e3-67d9-7af2-ac07-6065fc2ea483" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019e64e3-67d9-79e1-8c87-7dfb796c7321" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e64e3-67d9-7be8-8b5c-33e8f57a1423" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019e64e3-67d9-79e1-8c87-7dfb796c7321" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_019e64e3-67d9-75dd-9122-2223b6ce4ac8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseDebt"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e64e3-67d9-7be8-8b5c-33e8f57a1423" xlink:to="loc_us-gaap_InterestExpenseDebt_019e64e3-67d9-75dd-9122-2223b6ce4ac8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseOther_019e64e3-67d9-7207-a803-fbb6892b9e3b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseOther"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e64e3-67d9-7be8-8b5c-33e8f57a1423" xlink:to="loc_us-gaap_InterestExpenseOther_019e64e3-67d9-7207-a803-fbb6892b9e3b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e64e3-67d9-7cb8-b001-6bbd6d24563c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e64e3-67d9-7a3a-9bf7-ba6e53cbcb60" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019e64e3-67d9-7cb8-b001-6bbd6d24563c" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e64e3-67d9-7a3a-9bf7-ba6e53cbcb60" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e64e3-67d9-7ec3-ab04-4d5619382604" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019e64e3-67d9-7cb8-b001-6bbd6d24563c" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e64e3-67d9-7ec3-ab04-4d5619382604" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019e64e3-67d9-7b73-a602-f847fc5db622" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_019e64e3-67d9-70ab-87c1-edd7e95e7796" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_019e64e3-67d9-7b73-a602-f847fc5db622" xlink:to="loc_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_019e64e3-67d9-70ab-87c1-edd7e95e7796" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019e64e3-67d9-7e6b-99a1-77f40da1442d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_019e64e3-67d9-7b73-a602-f847fc5db622" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019e64e3-67d9-7e6b-99a1-77f40da1442d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxesExcludingIncomeAndExciseTaxes_019e64e3-67d9-7529-808c-2c48fc709ef8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxes"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_019e64e3-67d9-7b73-a602-f847fc5db622" xlink:to="loc_us-gaap_TaxesExcludingIncomeAndExciseTaxes_019e64e3-67d9-7529-808c-2c48fc709ef8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_019e64e3-67d9-70c3-a4da-97967b73894d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_019e64e3-67d9-7b73-a602-f847fc5db622" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_019e64e3-67d9-70c3-a4da-97967b73894d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_019e64e3-67d9-7035-b5ee-b63b63044313" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_019e64e3-67d9-7b73-a602-f847fc5db622" xlink:to="loc_us-gaap_AssetImpairmentCharges_019e64e3-67d9-7035-b5ee-b63b63044313" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019e64e3-67d9-78f1-bfe1-a97c17560229" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019e64e3-67d9-71ae-8736-142730da3c98" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.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_OperatingIncomeLoss_019e64e3-67d9-78f1-bfe1-a97c17560229" xlink:to="loc_us-gaap_Revenues_019e64e3-67d9-71ae-8736-142730da3c98" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019e64e3-67d9-7b6d-944f-b057cfedd05e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019e64e3-67d9-78f1-bfe1-a97c17560229" xlink:to="loc_us-gaap_CostsAndExpenses_019e64e3-67d9-7b6d-944f-b057cfedd05e" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nationalfuelgas.com/role/ConsolidatedStatementsOfComprehensiveIncomeUnaudited" xlink:type="simple" xlink:href="nfg-20260630.xsd#ConsolidatedStatementsOfComprehensiveIncomeUnaudited"/>
  <link:calculationLink xlink:role="http://www.nationalfuelgas.com/role/ConsolidatedStatementsOfComprehensiveIncomeUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_019e64e3-67d9-7a57-aca5-c1a575d51595" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e64e3-67d9-7ecc-845c-e9ee81bf1d19" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.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_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_019e64e3-67d9-7a57-aca5-c1a575d51595" xlink:to="loc_us-gaap_NetIncomeLoss_019e64e3-67d9-7ecc-845c-e9ee81bf1d19" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e64e3-67d9-7a04-9df3-df7ad85ee2e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_019e64e3-67d9-7a57-aca5-c1a575d51595" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e64e3-67d9-7a04-9df3-df7ad85ee2e4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e64e3-67d9-7a1b-9f39-e11653c34e16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_019e64e3-67d9-7f7d-a957-910b74e04007" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e64e3-67d9-7a1b-9f39-e11653c34e16" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_019e64e3-67d9-7f7d-a957-910b74e04007" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_019e64e3-67d9-744d-9169-0d0f287838f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e64e3-67d9-7a1b-9f39-e11653c34e16" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTax_019e64e3-67d9-744d-9169-0d0f287838f2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_019e64e3-67d9-7c58-ae0c-4079b9cf17ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax_019e64e3-67d9-7bc8-8203-7daf4775faf9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossTax_019e64e3-67d9-7c58-ae0c-4079b9cf17ae" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax_019e64e3-67d9-7bc8-8203-7daf4775faf9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax_019e64e3-67d9-7df5-ad4d-0eb132c62926" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossTax_019e64e3-67d9-7c58-ae0c-4079b9cf17ae" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax_019e64e3-67d9-7df5-ad4d-0eb132c62926" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_019e64e3-67d9-7324-934d-c7169d85209b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019e64e3-67d9-7235-93e4-486ee5b345d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_019e64e3-67d9-7324-934d-c7169d85209b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019e64e3-67d9-7235-93e4-486ee5b345d9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_019e64e3-67d9-76a8-81b1-a04d27ce25f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTax_019e64e3-67d9-7324-934d-c7169d85209b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_019e64e3-67d9-76a8-81b1-a04d27ce25f9" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nationalfuelgas.com/role/ConsolidatedBalanceSheetsUnaudited" xlink:type="simple" xlink:href="nfg-20260630.xsd#ConsolidatedBalanceSheetsUnaudited"/>
  <link:calculationLink xlink:role="http://www.nationalfuelgas.com/role/ConsolidatedBalanceSheetsUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_019e64e3-67d9-7cb1-a1ee-6dd831e89690" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_019e64e3-67d9-74c7-9c8c-b99a9ea4e97c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.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_LiabilitiesNoncurrent_019e64e3-67d9-7cb1-a1ee-6dd831e89690" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_019e64e3-67d9-74c7-9c8c-b99a9ea4e97c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_TaxesRefundableToCustomers_019e64e3-67d9-7181-9857-1811d0778932" xlink:href="nfg-20260630.xsd#nfg_TaxesRefundableToCustomers"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_019e64e3-67d9-7cb1-a1ee-6dd831e89690" xlink:to="loc_nfg_TaxesRefundableToCustomers_019e64e3-67d9-7181-9857-1811d0778932" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_CostOfRemovalRegulatoryLiability_019e64e3-67d9-7f75-9123-1d2db84bd111" xlink:href="nfg-20260630.xsd#nfg_CostOfRemovalRegulatoryLiability"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_019e64e3-67d9-7cb1-a1ee-6dd831e89690" xlink:to="loc_nfg_CostOfRemovalRegulatoryLiability_019e64e3-67d9-7f75-9123-1d2db84bd111" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_RegulatoryLiabilityNoncurrentOther_019e64e3-67d9-79ca-9f9b-7d4fae18e3fe" xlink:href="nfg-20260630.xsd#nfg_RegulatoryLiabilityNoncurrentOther"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_019e64e3-67d9-7cb1-a1ee-6dd831e89690" xlink:to="loc_nfg_RegulatoryLiabilityNoncurrentOther_019e64e3-67d9-79ca-9f9b-7d4fae18e3fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PostemploymentBenefitsLiabilityNoncurrent_019e64e3-67d9-781c-8e86-695a7cdd2b2c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PostemploymentBenefitsLiabilityNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_019e64e3-67d9-7cb1-a1ee-6dd831e89690" xlink:to="loc_us-gaap_PostemploymentBenefitsLiabilityNoncurrent_019e64e3-67d9-781c-8e86-695a7cdd2b2c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationsNoncurrent_019e64e3-67d9-7280-a7cb-d99a17973aa0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetRetirementObligationsNoncurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_019e64e3-67d9-7cb1-a1ee-6dd831e89690" xlink:to="loc_us-gaap_AssetRetirementObligationsNoncurrent_019e64e3-67d9-7280-a7cb-d99a17973aa0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_019e64e3-67d9-7787-80cd-1d5632992f26" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_019e64e3-67d9-7cb1-a1ee-6dd831e89690" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_019e64e3-67d9-7787-80cd-1d5632992f26" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019e64e3-67d9-72da-897f-494b7ee3f942" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019e64e3-67d9-7789-bd83-841506d2c5a6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e64e3-67d9-72da-897f-494b7ee3f942" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019e64e3-67d9-7789-bd83-841506d2c5a6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019e64e3-67d9-76b4-893d-b00d70f705f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.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_019e64e3-67d9-72da-897f-494b7ee3f942" xlink:to="loc_us-gaap_AssetsCurrent_019e64e3-67d9-76b4-893d-b00d70f705f3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_TotalOtherAssets_019e64e3-67d9-7ee9-a11e-3f8ddcf71e49" xlink:href="nfg-20260630.xsd#nfg_TotalOtherAssets"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019e64e3-67d9-72da-897f-494b7ee3f942" xlink:to="loc_nfg_TotalOtherAssets_019e64e3-67d9-7ee9-a11e-3f8ddcf71e49" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_TotalOtherAssets_019e64e3-67d9-7a69-96be-dfccba879656" xlink:href="nfg-20260630.xsd#nfg_TotalOtherAssets"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_RecoverableFutureTaxes_019e64e3-67d9-77df-be80-e5ce743159eb" xlink:href="nfg-20260630.xsd#nfg_RecoverableFutureTaxes"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_nfg_TotalOtherAssets_019e64e3-67d9-7a69-96be-dfccba879656" xlink:to="loc_nfg_RecoverableFutureTaxes_019e64e3-67d9-77df-be80-e5ce743159eb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedLossReacquiredDebtNoncurrent_019e64e3-67d9-70a0-a13a-4ab5d9e6e366" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnamortizedLossReacquiredDebtNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_nfg_TotalOtherAssets_019e64e3-67d9-7a69-96be-dfccba879656" xlink:to="loc_us-gaap_UnamortizedLossReacquiredDebtNoncurrent_019e64e3-67d9-70a0-a13a-4ab5d9e6e366" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_RegulatoryAssetNoncurrentOther_019e64e3-67d9-7317-8657-32004858b3b8" xlink:href="nfg-20260630.xsd#nfg_RegulatoryAssetNoncurrentOther"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_nfg_TotalOtherAssets_019e64e3-67d9-7a69-96be-dfccba879656" xlink:to="loc_nfg_RegulatoryAssetNoncurrentOther_019e64e3-67d9-7317-8657-32004858b3b8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCosts_019e64e3-67d9-7579-9128-47af4146992f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredCosts"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_nfg_TotalOtherAssets_019e64e3-67d9-7a69-96be-dfccba879656" xlink:to="loc_us-gaap_DeferredCosts_019e64e3-67d9-7579-9128-47af4146992f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInvestments_019e64e3-67d9-7021-9922-1b18a60eb995" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherInvestments"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_nfg_TotalOtherAssets_019e64e3-67d9-7a69-96be-dfccba879656" xlink:to="loc_us-gaap_OtherInvestments_019e64e3-67d9-7021-9922-1b18a60eb995" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019e64e3-67d9-7eca-81be-3e70e81e6ae3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_nfg_TotalOtherAssets_019e64e3-67d9-7a69-96be-dfccba879656" xlink:to="loc_us-gaap_Goodwill_019e64e3-67d9-7eca-81be-3e70e81e6ae3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_019e64e3-67d9-7f5b-bb14-bca1f4b95e03" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_nfg_TotalOtherAssets_019e64e3-67d9-7a69-96be-dfccba879656" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_019e64e3-67d9-7f5b-bb14-bca1f4b95e03" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgesNoncurrent_019e64e3-67d9-72aa-bbdd-f616decdd252" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsAndHedgesNoncurrent"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_nfg_TotalOtherAssets_019e64e3-67d9-7a69-96be-dfccba879656" xlink:to="loc_us-gaap_DerivativeInstrumentsAndHedgesNoncurrent_019e64e3-67d9-72aa-bbdd-f616decdd252" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019e64e3-67d9-7911-8cad-b5f9e41455a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_nfg_TotalOtherAssets_019e64e3-67d9-7a69-96be-dfccba879656" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019e64e3-67d9-7911-8cad-b5f9e41455a9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e64e3-67d9-7d61-a355-fac97ee00639" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizationLongtermDebtAndEquity_019e64e3-67d9-7084-b0b2-b1412c609a16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalizationLongtermDebtAndEquity"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e64e3-67d9-7d61-a355-fac97ee00639" xlink:to="loc_us-gaap_CapitalizationLongtermDebtAndEquity_019e64e3-67d9-7084-b0b2-b1412c609a16" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019e64e3-67d9-7e8b-b12e-3459f30793d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e64e3-67d9-7d61-a355-fac97ee00639" xlink:to="loc_us-gaap_LiabilitiesCurrent_019e64e3-67d9-7e8b-b12e-3459f30793d3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_019e64e3-67d9-7729-b2e5-2f31b929a949" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e64e3-67d9-7d61-a355-fac97ee00639" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_019e64e3-67d9-7729-b2e5-2f31b929a949" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019e64e3-67d9-7080-9110-735f015d060b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_019e64e3-67d9-7815-a4d5-3c3e08339ff4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_019e64e3-67d9-7080-9110-735f015d060b" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_019e64e3-67d9-7815-a4d5-3c3e08339ff4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019e64e3-67d9-7d69-9d19-7dcc469e2418" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_019e64e3-67d9-7080-9110-735f015d060b" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019e64e3-67d9-7d69-9d19-7dcc469e2418" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizationLongtermDebtAndEquity_019e64e3-67d9-7c30-a938-b0332c8d979e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalizationLongtermDebtAndEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e64e3-67d9-749a-8297-1a5378686ff1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CapitalizationLongtermDebtAndEquity_019e64e3-67d9-7c30-a938-b0332c8d979e" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e64e3-67d9-749a-8297-1a5378686ff1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_019e64e3-67d9-7e2a-b528-4d936413f8dd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.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_CapitalizationLongtermDebtAndEquity_019e64e3-67d9-7c30-a938-b0332c8d979e" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_019e64e3-67d9-7e2a-b528-4d936413f8dd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019e64e3-67d9-7945-b112-e692e8c87354" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e64e3-67d9-7e7f-b8f9-31fe1c717c40" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.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_AssetsCurrent_019e64e3-67d9-7945-b112-e692e8c87354" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e64e3-67d9-7e7f-b8f9-31fe1c717c40" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndOtherReceivablesNetCurrent_019e64e3-67d9-70f4-9488-2c14cb46745f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsAndOtherReceivablesNetCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019e64e3-67d9-7945-b112-e692e8c87354" xlink:to="loc_us-gaap_AccountsAndOtherReceivablesNetCurrent_019e64e3-67d9-70f4-9488-2c14cb46745f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnbilledReceivablesCurrent_019e64e3-67d9-72ba-a818-056eb40bdbaa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnbilledReceivablesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019e64e3-67d9-7945-b112-e692e8c87354" xlink:to="loc_us-gaap_UnbilledReceivablesCurrent_019e64e3-67d9-72ba-a818-056eb40bdbaa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnergyRelatedInventoryGasStoredUnderground_019e64e3-67d9-7638-9026-38b06beae975" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EnergyRelatedInventoryGasStoredUnderground"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019e64e3-67d9-7945-b112-e692e8c87354" xlink:to="loc_us-gaap_EnergyRelatedInventoryGasStoredUnderground_019e64e3-67d9-7638-9026-38b06beae975" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRawMaterialsAndSupplies_019e64e3-67d9-7ba3-b968-f51b99d5378c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryRawMaterialsAndSupplies"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019e64e3-67d9-7945-b112-e692e8c87354" xlink:to="loc_us-gaap_InventoryRawMaterialsAndSupplies_019e64e3-67d9-7ba3-b968-f51b99d5378c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_019e64e3-67d9-7fb5-975c-ccfd6e843f51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019e64e3-67d9-7945-b112-e692e8c87354" xlink:to="loc_us-gaap_OtherAssetsCurrent_019e64e3-67d9-7fb5-975c-ccfd6e843f51" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecoveredCostsForPurchasedGasAmount_019e64e3-67d9-781b-abb8-42e37653af75" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecoveredCostsForPurchasedGasAmount"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019e64e3-67d9-7945-b112-e692e8c87354" xlink:to="loc_us-gaap_UnrecoveredCostsForPurchasedGasAmount_019e64e3-67d9-781b-abb8-42e37653af75" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e64e3-67d9-7b9b-a6dd-934fae62e755" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019e64e3-67d9-75e0-a70b-ebfab438747e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e64e3-67d9-7b9b-a6dd-934fae62e755" xlink:to="loc_us-gaap_CommonStockValue_019e64e3-67d9-75e0-a70b-ebfab438747e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019e64e3-67d9-78a5-9e3c-62ca7182b126" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e64e3-67d9-7b9b-a6dd-934fae62e755" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019e64e3-67d9-78a5-9e3c-62ca7182b126" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_019e64e3-67d9-782c-9588-30024c95ae80" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e64e3-67d9-7b9b-a6dd-934fae62e755" xlink:to="loc_us-gaap_AdditionalPaidInCapital_019e64e3-67d9-782c-9588-30024c95ae80" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019e64e3-67d9-7660-b7b1-2de562b7fb09" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e64e3-67d9-7b9b-a6dd-934fae62e755" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019e64e3-67d9-7660-b7b1-2de562b7fb09" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019e64e3-67d9-77af-885f-ddc999dc7dae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019e64e3-67d9-76e0-ae74-5e2424031828" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermBorrowings"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019e64e3-67d9-77af-885f-ddc999dc7dae" xlink:to="loc_us-gaap_ShortTermBorrowings_019e64e3-67d9-76e0-ae74-5e2424031828" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019e64e3-67d9-7c4c-ad84-15b63eecc3df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.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_019e64e3-67d9-77af-885f-ddc999dc7dae" xlink:to="loc_us-gaap_AccountsPayableCurrent_019e64e3-67d9-7c4c-ad84-15b63eecc3df" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RefundableGasCosts_019e64e3-67d9-78df-a92d-d72f69c2963e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RefundableGasCosts"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019e64e3-67d9-77af-885f-ddc999dc7dae" xlink:to="loc_us-gaap_RefundableGasCosts_019e64e3-67d9-78df-a92d-d72f69c2963e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableCurrent_019e64e3-67d9-7f65-9a3f-a0b349a573e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsPayableCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019e64e3-67d9-77af-885f-ddc999dc7dae" xlink:to="loc_us-gaap_DividendsPayableCurrent_019e64e3-67d9-7f65-9a3f-a0b349a573e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_InterestPayableOnLongTermDebt_019e64e3-67d9-7cff-8377-57ea280d5db6" xlink:href="nfg-20260630.xsd#nfg_InterestPayableOnLongTermDebt"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019e64e3-67d9-77af-885f-ddc999dc7dae" xlink:to="loc_nfg_InterestPayableOnLongTermDebt_019e64e3-67d9-7cff-8377-57ea280d5db6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_CustomerAdvances_019e64e3-67d9-7c46-be9e-32cd438c1f85" xlink:href="nfg-20260630.xsd#nfg_CustomerAdvances"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019e64e3-67d9-77af-885f-ddc999dc7dae" xlink:to="loc_nfg_CustomerAdvances_019e64e3-67d9-7c46-be9e-32cd438c1f85" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecurityDepositLiability_019e64e3-67d9-75d5-8e5c-1657f3d6cdfa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecurityDepositLiability"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019e64e3-67d9-77af-885f-ddc999dc7dae" xlink:to="loc_us-gaap_SecurityDepositLiability_019e64e3-67d9-75d5-8e5c-1657f3d6cdfa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_019e64e3-67d9-72db-83c3-6d0f4377e4ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019e64e3-67d9-77af-885f-ddc999dc7dae" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_019e64e3-67d9-72db-83c3-6d0f4377e4ae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgesLiabilities_019e64e3-67d9-79aa-82fa-f804d0e02569" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsAndHedgesLiabilities"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019e64e3-67d9-77af-885f-ddc999dc7dae" xlink:to="loc_us-gaap_DerivativeInstrumentsAndHedgesLiabilities_019e64e3-67d9-79aa-82fa-f804d0e02569" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_019e64e3-67d9-707a-b37e-6607698481c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019e64e3-67d9-77af-885f-ddc999dc7dae" xlink:to="loc_us-gaap_LongTermDebtCurrent_019e64e3-67d9-707a-b37e-6607698481c3" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nationalfuelgas.com/role/ConsolidatedStatementsOfCashFlowsUnaudited" xlink:type="simple" xlink:href="nfg-20260630.xsd#ConsolidatedStatementsOfCashFlowsUnaudited"/>
  <link:calculationLink xlink:role="http://www.nationalfuelgas.com/role/ConsolidatedStatementsOfCashFlowsUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e64e3-67d9-76d9-8b91-dc7440eb8fda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.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_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_NetIncomeLoss_019e64e3-67d9-76d9-8b91-dc7440eb8fda" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_019e64e3-67d9-702c-9a8d-bca4af36dc5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_AssetImpairmentCharges_019e64e3-67d9-702c-9a8d-bca4af36dc5c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019e64e3-67d9-71a7-bf49-39f32c2b32f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019e64e3-67d9-71a7-bf49-39f32c2b32f7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019e64e3-67d9-7bee-bd71-6b7b488775c4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019e64e3-67d9-7bee-bd71-6b7b488775c4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019e64e3-67d9-7e49-a3d7-2ddd8e5c9902" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019e64e3-67d9-7e49-a3d7-2ddd8e5c9902" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_019e64e3-67d9-795d-9e9b-a30fa64a99af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_ShareBasedCompensation_019e64e3-67d9-795d-9e9b-a30fa64a99af" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_019e64e3-67d9-78cb-ae3d-5e70a185d943" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNoncashIncomeExpense"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_019e64e3-67d9-78cb-ae3d-5e70a185d943" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInReceivables_019e64e3-67d9-7df7-970d-fe542ec7f3d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInReceivables"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_IncreaseDecreaseInReceivables_019e64e3-67d9-7df7-970d-fe542ec7f3d1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_019e64e3-67d9-7dc5-9ed0-141aba2eeed6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_019e64e3-67d9-7dc5-9ed0-141aba2eeed6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredGasCost_019e64e3-67d9-7372-90a8-5f5ae0fcac00" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInDeferredGasCost"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredGasCost_019e64e3-67d9-7372-90a8-5f5ae0fcac00" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_019e64e3-67d9-7a8b-9a08-2c868533fb3f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_019e64e3-67d9-7a8b-9a08-2c868533fb3f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableTrade_019e64e3-67d9-7626-b9d6-ea1b866e9730" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsPayableTrade"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableTrade_019e64e3-67d9-7626-b9d6-ea1b866e9730" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInRegulatoryClauseRevenue_019e64e3-67d9-7634-a354-7014583832c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInRegulatoryClauseRevenue"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_IncreaseDecreaseInRegulatoryClauseRevenue_019e64e3-67d9-7634-a354-7014583832c9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_IncreaseDecreaseInCustomerAdvancesCurrent_019e64e3-67d9-7286-9ddf-705997d7469f" xlink:href="nfg-20260630.xsd#nfg_IncreaseDecreaseInCustomerAdvancesCurrent"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_nfg_IncreaseDecreaseInCustomerAdvancesCurrent_019e64e3-67d9-7286-9ddf-705997d7469f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInSecurityDeposits_019e64e3-67d9-7788-bdf2-6a4fd3c0cd5b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInSecurityDeposits"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_IncreaseDecreaseInSecurityDeposits_019e64e3-67d9-7788-bdf2-6a4fd3c0cd5b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_019e64e3-67d9-758c-a16f-26bfa6bfe05f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_019e64e3-67d9-758c-a16f-26bfa6bfe05f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_019e64e3-67d9-754f-b8bf-e5f2e87d9ee8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets"/>
    <link:calculationArc order="17" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_019e64e3-67d9-754f-b8bf-e5f2e87d9ee8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_019e64e3-67d9-7896-9b09-3a4859f256e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:calculationArc order="18" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-7230-8f34-f47ac7c3a171" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_019e64e3-67d9-7896-9b09-3a4859f256e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e64e3-67d9-7c64-9e30-34198ffd6f47" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019e64e3-67d9-7d90-8a29-0f954b24733d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e64e3-67d9-7c64-9e30-34198ffd6f47" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019e64e3-67d9-7d90-8a29-0f954b24733d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_019e64e3-67d9-7172-8701-3338bb59dbd2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e64e3-67d9-7c64-9e30-34198ffd6f47" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_019e64e3-67d9-7172-8701-3338bb59dbd2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e64e3-67d9-7e6f-95f1-245ce1d90031" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess_019e64e3-67d9-703b-9f62-5040ae5fffa4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e64e3-67d9-7e6f-95f1-245ce1d90031" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess_019e64e3-67d9-703b-9f62-5040ae5fffa4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_019e64e3-67d9-78fb-950b-50c13112478a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e64e3-67d9-7e6f-95f1-245ce1d90031" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_019e64e3-67d9-78fb-950b-50c13112478a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_019e64e3-67d9-7077-9907-f461bbc808c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e64e3-67d9-7e6f-95f1-245ce1d90031" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_019e64e3-67d9-7077-9907-f461bbc808c6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_019e64e3-67d9-70d5-babe-d88adc280499" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e64e3-67d9-7e6f-95f1-245ce1d90031" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_019e64e3-67d9-70d5-babe-d88adc280499" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_019e64e3-67d9-72f3-b7cf-ac3b6005c60f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfDividendsCommonStock"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e64e3-67d9-7e6f-95f1-245ce1d90031" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_019e64e3-67d9-72f3-b7cf-ac3b6005c60f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_019e64e3-67d9-71fe-b3a8-91b9858acddd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e64e3-67d9-7e6f-95f1-245ce1d90031" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_019e64e3-67d9-71fe-b3a8-91b9858acddd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_PaymentsForRepurchaseOfCommonStockUnderStockAndBenefitPlansNet_019e64e3-67d9-7a8d-810b-6b85a2f80656" xlink:href="nfg-20260630.xsd#nfg_PaymentsForRepurchaseOfCommonStockUnderStockAndBenefitPlansNet"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e64e3-67d9-7e6f-95f1-245ce1d90031" xlink:to="loc_nfg_PaymentsForRepurchaseOfCommonStockUnderStockAndBenefitPlansNet_019e64e3-67d9-7a8d-810b-6b85a2f80656" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_019e64e3-67d9-7c47-a135-60cfdb089f23" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-779c-9c94-77bbb29b7f30" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.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_019e64e3-67d9-7c47-a135-60cfdb089f23" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e64e3-67d9-779c-9c94-77bbb29b7f30" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e64e3-67d9-797d-b9ff-fd037a5ae972" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.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_019e64e3-67d9-7c47-a135-60cfdb089f23" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e64e3-67d9-797d-b9ff-fd037a5ae972" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e64e3-67d9-7176-b5e6-8921f1898823" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.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_019e64e3-67d9-7c47-a135-60cfdb089f23" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e64e3-67d9-7176-b5e6-8921f1898823" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nationalfuelgas.com/role/SummaryofSignificantAccountingPoliciesScheduleofComponentsofOtherCurrentAssetsDetails" xlink:type="simple" xlink:href="nfg-20260630.xsd#SummaryofSignificantAccountingPoliciesScheduleofComponentsofOtherCurrentAssetsDetails"/>
  <link:calculationLink xlink:role="http://www.nationalfuelgas.com/role/SummaryofSignificantAccountingPoliciesScheduleofComponentsofOtherCurrentAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_019e64e3-67d9-724f-837e-70fcc84fc404" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPrepaidExpenseCurrent_019e64e3-67d9-7ac9-81ca-40ca13f7c96d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherPrepaidExpenseCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsCurrent_019e64e3-67d9-724f-837e-70fcc84fc404" xlink:to="loc_us-gaap_OtherPrepaidExpenseCurrent_019e64e3-67d9-7ac9-81ca-40ca13f7c96d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidTaxes_019e64e3-67d9-79a8-8975-8b631a6cca87" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidTaxes"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsCurrent_019e64e3-67d9-724f-837e-70fcc84fc404" xlink:to="loc_us-gaap_PrepaidTaxes_019e64e3-67d9-79a8-8975-8b631a6cca87" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReceivable_019e64e3-67d9-7a31-8276-639b8858b137" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReceivable"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsCurrent_019e64e3-67d9-724f-837e-70fcc84fc404" xlink:to="loc_us-gaap_IncomeTaxReceivable_019e64e3-67d9-7a31-8276-639b8858b137" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetsCurrent_019e64e3-67d9-7c5d-943c-215ee8e1bddf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetsCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsCurrent_019e64e3-67d9-724f-837e-70fcc84fc404" xlink:to="loc_us-gaap_RegulatoryAssetsCurrent_019e64e3-67d9-7c5d-943c-215ee8e1bddf" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nationalfuelgas.com/role/SummaryofSignificantAccountingPoliciesScheduleofOtherAccrualsandCurrentLiabilitiesDetails" xlink:type="simple" xlink:href="nfg-20260630.xsd#SummaryofSignificantAccountingPoliciesScheduleofOtherAccrualsandCurrentLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.nationalfuelgas.com/role/SummaryofSignificantAccountingPoliciesScheduleofOtherAccrualsandCurrentLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_019e64e3-67d9-75a8-94b1-5340369d45c4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_OtherAccruedLiabilitiesAccruedCapitalExpenditures_019e64e3-67d9-72e7-a5d8-a9e4738a7ad5" xlink:href="nfg-20260630.xsd#nfg_OtherAccruedLiabilitiesAccruedCapitalExpenditures"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_019e64e3-67d9-75a8-94b1-5340369d45c4" xlink:to="loc_nfg_OtherAccruedLiabilitiesAccruedCapitalExpenditures_019e64e3-67d9-72e7-a5d8-a9e4738a7ad5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_RegulatoryLiabilityCurrentOther_019e64e3-67d9-7098-943a-f08230ab7faa" xlink:href="nfg-20260630.xsd#nfg_RegulatoryLiabilityCurrentOther"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_019e64e3-67d9-75a8-94b1-5340369d45c4" xlink:to="loc_nfg_RegulatoryLiabilityCurrentOther_019e64e3-67d9-7098-943a-f08230ab7faa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_CurrentLiabilitiesReserveForGasReplacement_019e64e3-67d9-7a49-9269-96a1497057a8" xlink:href="nfg-20260630.xsd#nfg_CurrentLiabilitiesReserveForGasReplacement"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_019e64e3-67d9-75a8-94b1-5340369d45c4" xlink:to="loc_nfg_CurrentLiabilitiesReserveForGasReplacement_019e64e3-67d9-7a49-9269-96a1497057a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_LiabilityForRoyaltyAndWorkingInterestCurrent_019e64e3-67d9-7d90-aa3c-c6dcf2f81a95" xlink:href="nfg-20260630.xsd#nfg_LiabilityForRoyaltyAndWorkingInterestCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_019e64e3-67d9-75a8-94b1-5340369d45c4" xlink:to="loc_nfg_LiabilityForRoyaltyAndWorkingInterestCurrent_019e64e3-67d9-7d90-aa3c-c6dcf2f81a95" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_019e64e3-67d9-768d-8e7a-48662ca98571" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedIncomeTaxesCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_019e64e3-67d9-75a8-94b1-5340369d45c4" xlink:to="loc_us-gaap_AccruedIncomeTaxesCurrent_019e64e3-67d9-768d-8e7a-48662ca98571" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_AccruedPennsylvaniaImpactFeeCurrent_019e64e3-67d9-7c64-93be-4ec8cd5a65a9" xlink:href="nfg-20260630.xsd#nfg_AccruedPennsylvaniaImpactFeeCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_019e64e3-67d9-75a8-94b1-5340369d45c4" xlink:to="loc_nfg_AccruedPennsylvaniaImpactFeeCurrent_019e64e3-67d9-7c64-93be-4ec8cd5a65a9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_DefinedBenefitPlanBenefitObligationCurrent_019e64e3-67da-740a-a6b5-47930465b07d" xlink:href="nfg-20260630.xsd#nfg_DefinedBenefitPlanBenefitObligationCurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_019e64e3-67d9-75a8-94b1-5340369d45c4" xlink:to="loc_nfg_DefinedBenefitPlanBenefitObligationCurrent_019e64e3-67da-740a-a6b5-47930465b07d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_019e6c6c-1700-7841-b16d-687be6973793" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AccruedLiabilitiesCurrent_019e64e3-67d9-75a8-94b1-5340369d45c4" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_019e6c6c-1700-7841-b16d-687be6973793" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nationalfuelgas.com/role/RevenuefromContractswithCustomersScheduleofDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="nfg-20260630.xsd#RevenuefromContractswithCustomersScheduleofDisaggregationofRevenueDetails"/>
  <link:calculationLink xlink:role="http://www.nationalfuelgas.com/role/RevenuefromContractswithCustomersScheduleofDisaggregationofRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019e64e3-67da-71d6-9f50-43c5f58302dd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e64e3-67da-7185-8e42-38940fdffcab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_019e64e3-67da-71d6-9f50-43c5f58302dd" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e64e3-67da-7185-8e42-38940fdffcab" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_AlternativeRevenuePrograms_019e64e3-67da-7fe6-af17-89d0492e3917" xlink:href="nfg-20260630.xsd#nfg_AlternativeRevenuePrograms"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_019e64e3-67da-71d6-9f50-43c5f58302dd" xlink:to="loc_nfg_AlternativeRevenuePrograms_019e64e3-67da-7fe6-af17-89d0492e3917" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019e64e3-67da-70e6-bfa1-06ba2d9b768b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_019e64e3-67da-71d6-9f50-43c5f58302dd" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019e64e3-67da-70e6-bfa1-06ba2d9b768b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nationalfuelgas.com/role/FairValueMeasurementsScheduleofRecurringFairValueMeasuresofAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="nfg-20260630.xsd#FairValueMeasurementsScheduleofRecurringFairValueMeasuresofAssetsandLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.nationalfuelgas.com/role/FairValueMeasurementsScheduleofRecurringFairValueMeasuresofAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_019e64e3-67da-7f0f-828d-3f8566ae641d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e64e3-67da-7f76-aa70-dc454ad648ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosure_019e64e3-67da-7f0f-828d-3f8566ae641d" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e64e3-67da-7f76-aa70-dc454ad648ad" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisNettingAdjustments_019e64e3-67da-78e7-b6f0-32ffd1d31357" xlink:href="nfg-20260630.xsd#nfg_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisNettingAdjustments"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019e64e3-67da-7333-932c-66b216da4591" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetFairValueGrossLiability"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_nfg_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisNettingAdjustments_019e64e3-67da-78e7-b6f0-32ffd1d31357" xlink:to="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019e64e3-67da-7333-932c-66b216da4591" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019e64e3-67da-78ba-8a87-e15fbb521d15" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityFairValueGrossAsset"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_nfg_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisNettingAdjustments_019e64e3-67da-78e7-b6f0-32ffd1d31357" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019e64e3-67da-78ba-8a87-e15fbb521d15" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019e64e3-67da-7679-a888-706edddd426a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e64e3-67da-7ed3-9627-fc8bcce75366" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeAssets_019e64e3-67da-7679-a888-706edddd426a" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e64e3-67da-7ed3-9627-fc8bcce75366" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019e64e3-67da-78e3-9e47-23d83f66094c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetFairValueGrossLiability"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeAssets_019e64e3-67da-7679-a888-706edddd426a" xlink:to="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019e64e3-67da-78e3-9e47-23d83f66094c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019e64e3-67da-7b2e-96f3-296c649e7868" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e64e3-67da-75cd-ad7e-6752f1a7468c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_019e64e3-67da-7b2e-96f3-296c649e7868" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e64e3-67da-75cd-ad7e-6752f1a7468c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e64e3-67da-7529-a571-bcee89ef1804" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_019e64e3-67da-7b2e-96f3-296c649e7868" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e64e3-67da-7529-a571-bcee89ef1804" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_019e64e3-67da-7887-8a29-cfa29060d7fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentsFairValueDisclosure"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_019e64e3-67da-7b2e-96f3-296c649e7868" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_019e64e3-67da-7887-8a29-cfa29060d7fc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisNet_019e64e3-67da-7a03-afeb-1bffea517358" xlink:href="nfg-20260630.xsd#nfg_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019e64e3-67da-7967-b878-cc5a120ba492" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_nfg_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisNet_019e64e3-67da-7a03-afeb-1bffea517358" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019e64e3-67da-7967-b878-cc5a120ba492" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_019e64e3-67da-7f38-a060-e808bed98b7f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_nfg_FairValueAssetsLiabilitiesMeasuredOnRecurringBasisNet_019e64e3-67da-7a03-afeb-1bffea517358" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_019e64e3-67da-7f38-a060-e808bed98b7f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nationalfuelgas.com/role/FinancialInstrumentsScheduleofOtherInvestmentsDetails" xlink:type="simple" xlink:href="nfg-20260630.xsd#FinancialInstrumentsScheduleofOtherInvestmentsDetails"/>
  <link:calculationLink xlink:role="http://www.nationalfuelgas.com/role/FinancialInstrumentsScheduleofOtherInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInvestments_019f90a8-1de2-768f-9023-e09c66ccd533" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherInvestments"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashSurrenderValueOfLifeInsurance_019f90a8-1de2-7ed8-9d38-75070ca423b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashSurrenderValueOfLifeInsurance"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherInvestments_019f90a8-1de2-768f-9023-e09c66ccd533" xlink:to="loc_us-gaap_CashSurrenderValueOfLifeInsurance_019f90a8-1de2-7ed8-9d38-75070ca423b6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_019f90a8-1de2-74de-98d9-55ea9c740ee3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherInvestments_019f90a8-1de2-768f-9023-e09c66ccd533" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_019f90a8-1de2-74de-98d9-55ea9c740ee3" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nationalfuelgas.com/role/CapitalizationScheduleofCommonStockShareActivityDetails" xlink:type="simple" xlink:href="nfg-20260630.xsd#CapitalizationScheduleofCommonStockShareActivityDetails"/>
  <link:calculationLink xlink:role="http://www.nationalfuelgas.com/role/CapitalizationScheduleofCommonStockShareActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_nfg_TotalCommonStockIssuedDuringPeriodShares_019f848c-ee70-7106-b2e9-1fcee5907176" xlink:href="nfg-20260630.xsd#nfg_TotalCommonStockIssuedDuringPeriodShares"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019f848c-ee70-7603-9ac5-d2b0e279a68d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_nfg_TotalCommonStockIssuedDuringPeriodShares_019f848c-ee70-7106-b2e9-1fcee5907176" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019f848c-ee70-7603-9ac5-d2b0e279a68d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_019f848c-ee70-7f76-a5e7-9871e1f213e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_nfg_TotalCommonStockIssuedDuringPeriodShares_019f848c-ee70-7106-b2e9-1fcee5907176" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_019f848c-ee70-7f76-a5e7-9871e1f213e9" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nationalfuelgas.com/role/BusinessSegmentInformationScheduleofInformationBySegmentDetails" xlink:type="simple" xlink:href="nfg-20260630.xsd#BusinessSegmentInformationScheduleofInformationBySegmentDetails"/>
  <link:calculationLink xlink:role="http://www.nationalfuelgas.com/role/BusinessSegmentInformationScheduleofInformationBySegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019e64e3-67da-746a-bb4b-fef7dd80820c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_RevenuesExcludingIntersegmentRevenues_019e64e3-67da-7cce-9110-a586b39b993d" xlink:href="nfg-20260630.xsd#nfg_RevenuesExcludingIntersegmentRevenues"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_019e64e3-67da-746a-bb4b-fef7dd80820c" xlink:to="loc_nfg_RevenuesExcludingIntersegmentRevenues_019e64e3-67da-7cce-9110-a586b39b993d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_IntersegmentRevenues_019e64e3-67da-79da-ab1e-943882d11fd6" xlink:href="nfg-20260630.xsd#nfg_IntersegmentRevenues"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_019e64e3-67da-746a-bb4b-fef7dd80820c" xlink:to="loc_nfg_IntersegmentRevenues_019e64e3-67da-79da-ab1e-943882d11fd6" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.nationalfuelgas.com/role/RetirementPlanandOtherPostRetirementBenefitsScheduleofComponentsofNetPeriodicBenefitCostDetails" xlink:type="simple" xlink:href="nfg-20260630.xsd#RetirementPlanandOtherPostRetirementBenefitsScheduleofComponentsofNetPeriodicBenefitCostDetails"/>
  <link:calculationLink xlink:role="http://www.nationalfuelgas.com/role/RetirementPlanandOtherPostRetirementBenefitsScheduleofComponentsofNetPeriodicBenefitCostDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e64e3-6891-75e7-8311-c46ed870ec09" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_019e64e3-6891-7109-b54c-dbd133591fd0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e64e3-6891-75e7-8311-c46ed870ec09" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_019e64e3-6891-7109-b54c-dbd133591fd0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_019e64e3-6891-7a9d-81e3-940e4cf09dc3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e64e3-6891-75e7-8311-c46ed870ec09" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_019e64e3-6891-7a9d-81e3-940e4cf09dc3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019e64e3-6891-7dbe-9910-3dbe59daa815" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e64e3-6891-75e7-8311-c46ed870ec09" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019e64e3-6891-7dbe-9910-3dbe59daa815" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_019e64e3-6891-74c4-b6ea-4ef634a63113" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e64e3-6891-75e7-8311-c46ed870ec09" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_019e64e3-6891-74c4-b6ea-4ef634a63113" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_019e64e3-6891-7499-8968-107e340c6af9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e64e3-6891-75e7-8311-c46ed870ec09" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_019e64e3-6891-7499-8968-107e340c6af9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_nfg_NetAmortizationAndDeferralForRegulatoryPurposesIncludingVolumetricAdjustments_019e64e3-6891-7c16-ac49-26a315983264" xlink:href="nfg-20260630.xsd#nfg_NetAmortizationAndDeferralForRegulatoryPurposesIncludingVolumetricAdjustments"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e64e3-6891-75e7-8311-c46ed870ec09" xlink:to="loc_nfg_NetAmortizationAndDeferralForRegulatoryPurposesIncludingVolumetricAdjustments_019e64e3-6891-7c16-ac49-26a315983264" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
