Stair Calculator
Plan equal risers and estimate a straight stair flight’s run.
Runs on your device · No input uploadsResult
LOCALEnter your values, then choose Calculate.
How this tool works
The number of risers is rounded up to keep the actual riser at or below your chosen maximum. The upper floor is the final tread. These dimensions do not establish a safe or code-compliant design; landings, headroom, handrails, structure and local requirements need separate review.