What is the Stair Calculator?
Good stairs follow the “comfort rule”: 2 × riser + tread ≈ 600–650 mm, with risers around 150–180 mm. Enter the total rise (finished floor to finished floor) and your preferred riser height and tread depth. The calculator finds the number of steps, exact riser height, total horizontal run, stringer length and angle, and checks comfort.
How to use the Stair Calculator
- Measure total rise between finished floors.
- Enter the ideal riser height and tread depth.
- Read steps, exact dimensions and the comfort check.
Typical limits (homes)
- Riser: 150–190 mm
- Tread (going): 250–300 mm
- Angle: 30–38°
- Headroom: at least 2 m
This Stair Calculator is 100% free, needs no signup and runs privately in your browser – on phone, tablet or computer.
Last updated: · By NodifyTech