<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2023-02-20</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000106640</issuerCik>
        <issuerName>WHIRLPOOL CORP /DE/</issuerName>
        <issuerTradingSymbol>WHR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001545393</rptOwnerCik>
            <rptOwnerName>Brega Joao Carlos</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>WHIRLPOOL CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>2000 N. M-63</rptOwnerStreet2>
            <rptOwnerCity>BENTON HARBOR</rptOwnerCity>
            <rptOwnerState>MI</rptOwnerState>
            <rptOwnerZipCode>49022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>EVP AND PRESIDENT, LAR</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2023-02-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>7611</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>7611.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7611</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Represents amounts earned under a performance-based restricted stock unit award for the 2020-2022 performance period made under the Whirlpool Corporation Omnibus Stock and Incentive Plan. Earned amounts will vest and convert one-for-one to shares on 03/01/2023.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Bridget K. Quinn, Attorney-in-Fact</signatureName>
        <signatureDate>2023-02-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
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X0306
4
2023-02-20
0
0000106640
WHIRLPOOL CORP /DE/
WHR
0001545393
Brega Joao Carlos
WHIRLPOOL CORPORATION
2000 N. M-63
BENTON HARBOR
MI
49022
0
1
0
0
EVP AND PRESIDENT, LAR
Restricted Stock Units
2023-02-20
4
A
0
7611
0
A
Common Stock
7611.0
7611
D
Represents amounts earned under a performance-based restricted stock unit award for the 2020-2022 performance period made under the Whirlpool Corporation Omnibus Stock and Incentive Plan. Earned amounts will vest and convert one-for-one to shares on 03/01/2023.
/s/ Bridget K. Quinn, Attorney-in-Fact
2023-02-21