Stair Calculator

Estimate number of steps, riser height, and total horizontal run from total rise and tread assumptions.

Preparing Stair Calculator

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Input

Enter total rise, preferred riser height, and tread depth to estimate a simple stair layout. This tool shows the result instantly without step-by-step output.

Input summary

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How to use Stair Calculator

Provide the vertical rise and your preferred stair proportions, and the calculator will estimate how many steps and how much run the staircase may need.

What this calculator is for

This calculator is for early stair planning in remodeling, deck work, and layout discussions before a detailed code review or construction drawing is prepared.

Tips

Building-code requirements for riser height, tread depth, and nosing vary, so use this as a planning tool and not as final code approval.
Round the layout only after reviewing how the chosen riser count changes the comfort and total run of the stairs.