Overview
What Is a Stair Calculator?
This tool calculates the number of steps, individual rise per step, based on your total height and desired step height.
Calculate stair rise, run, and step count.
This tool calculates the number of steps, individual rise per step, based on your total height and desired step height.
Useful for planning stairs that meet comfortable and code-compliant proportions.
Input the total vertical height to climb.
Input your desired rise per step.
Number of steps and actual rise per step update automatically.
7-7.75 inches per step is common for residential stairs, though building codes specify exact requirements by jurisdiction.
Because the calculator divides total height evenly among whole-number steps, the actual rise adjusts slightly from your exact target.
No, always verify your specific stair dimensions against your local building code requirements.
The horizontal depth of each step (tread depth), typically 10-11 inches for comfortable residential stairs.
Divide total rise height by your target step height, then round to the nearest whole number.
No, calculations happen entirely in your browser.
Yes, building codes typically require uniform rise height across all steps for safety.
Yes, this calculation method applies to deck stairs as well as interior stairs.
No, this calculates rise and step count - stringer length would need additional trigonometric calculation based on total rise and run.
Yes, completely free with no sign-up required.