Stair layout calculator
Enter the total rise, the number of risers and your target tread depth. Results and the diagram update as you type.
Your measurements
Total rise is the full floor-to-floor height the stair has to climb. Riser count is one more than the number of treads — the top floor itself counts as the last "step."
Stair profile
Drawn to scale from your inputs
Actual riser height——
Tread depth——
Risers—Count
Treads—Count
Total rise—
Total run—
Stringer length—
Stair angle—
RiseRun gives you the arithmetic, not a code review. Riser and tread limits vary by jurisdiction and by whether the stair is inside a home, a deck, or a commercial building — check your local building code, and have the finished layout reviewed before you build.