Stair Calculator
Calculates the number of steps and actual riser height for a staircase.
Lilu Baba's Stair Calculator rounds your target riser height to a whole number of even steps, then shows the exact resulting riser height.
How to use this calculator
- Enter the total height (rise) the staircase must cover.
- Enter your target riser height (commonly 15-18cm).
- Number of steps and the resulting exact riser height update instantly.
Number of Steps
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Actual Riser Height (cm)
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FAQ
Stair Calculator — frequently asked questions
Most building codes and comfort guidelines suggest 15-18cm (roughly 6-7 inches) per riser.
Because the number of steps must be a whole number, the total rise is divided evenly, which slightly adjusts the final riser height from your initial target.