Skip to main content
    Pro Reference Trades Suite
    Sign InCreate accountAdminUpgrade
    All answers

    Sheet Metal Bend Allowance Calculator

    Why can finished parts still be off after using bend allowance?

    Real parts vary with die opening, punch radius, grain direction, springback, and material lot. Production work usually applies shop-specific bend deduction tables from measured test bends rather than pure theoretical values.

    Run the numbers for your project

    Use the Sheet Metal Bend Allowance Calculator to get an exact answer for your inputs.

    Open the calculator

    Related questions

    Estimates and general guidance only. Verify against your local code and AHJ before any installation. Gas, electrical, and refrigerant work is hazardous to untrained users.

    Pro launch updates

    Get notified when Pro launches, plus a monthly code-change digest. Email only — no account required.