Stair Calculator
Plan a comfortable staircase. Enter the total rise to get the number of steps and the exact height of each riser.
How it works
- 1
Enter the total rise
The vertical distance from the bottom floor to the top floor.
- 2
Get the number of steps
Based on a comfortable riser height, typically around 7 inches (18 cm).
- 3
See the exact riser height
Total rise divided evenly across the steps.
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Frequently asked questions
Around 7 inches (17.5-18 cm) is common for residential stairs, though codes vary by country.
How stair dimensions are calculated
The calculator divides the total rise by an ideal riser height (around 7 inches or 17.5-18 cm) to estimate the number of steps, then divides the total rise evenly by that number for the exact riser height, keeping every step the same.
Consistent riser height is critical for safety — uneven steps are a common cause of trips. Always check your local building code for exact minimum and maximum riser and tread dimensions.