Calculators
Stair Calculator
Calculate steps and riser height.
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About the Stair Calculator
Building a staircase? Enter the total rise (floor-to-floor height) and your tread run and the calculator returns the number of steps, the riser height per step, and the total run. It targets a comfortable ~7-inch riser for safe, code-friendly stairs.
How to use the Stair Calculator
- 01Enter your total rise and tread run.
- 02Read the result instantly — it recalculates as you type.
- 03Adjust the numbers to model different scenarios.
Frequently asked questions
What is a comfortable riser height?
About 7 to 7.75 inches per step. This tool divides the total rise into steps that land in that range.
How do I find the number of steps?
Divide the total rise by a comfortable riser (~7 in) and round. Then the exact riser is the rise divided by that step count.