Straight stair calculator
Calculate equal risers and treads from your total rise, run and chosen maximum riser.
Results
- Risers
- 16
- Treads
- 15
- Riser height
- 17.5 cm
- Tread depth
- 28 cm
Method · Limits
Risers = ceil(total rise / chosen maximum riser); treads = risers − 1 because the top floor is the final landing. Tread depth = total horizontal run / treads. At least two risers. Landing sizes, headroom and code compliance are not calculated.
Inputs stay on this device. Files include your values; share them intentionally. This is geometry and purchasing arithmetic, not a structural or building-code assessment. Prices exclude tax and delivery.