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    Construction & Electrical

    Stair Riser and Tread Calculator

    Use floor-to-floor rise to estimate the minimum number of risers at or below a chosen target height, then calculate actual riser height, tread count and horizontal run.

    MAKE IT SIMPLE
    Assumptions and limitations

    Local stairs code, landings, handrails, egress and buildable details are NOT automatically certified.

    Result

    Worked examples

    3,000 mm total rise, 175 mm target riser

    18 risers, approximately 166.7 mm each

    Use floor-to-floor rise to estimate the minimum number of risers at or below a chosen target height, then calculate actual riser height, tread count and horizontal run.

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