Calculators
Stair Calculator
Calculate steps and riser height.
FreeNo sign-upWorks in your browser
Enter details
Result
Number of steps
16
Riser height
7 in
Ideal 7–7.75 in
Total run
150 in
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
- 1Enter your total rise and tread run.
- 2Read the result instantly — it recalculates as you type.
- 3Adjust 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.