What is Staircase Calculator?

Enter your total rise and available run to get the number of steps, riser height, and tread depth for code-compliant stairs. Checks against IRC residential and IBC commercial building codes.

How to use

1. Enter the total floor-to-floor height (total rise) you need to span.
2. Optionally enter the available horizontal run space to constrain the design.
3. View the calculated number of steps, individual riser height, tread depth, and stair angle with code compliance indicators.

Result

Building stairs from ground floor to second floor with a 9-foot (108 inch) total rise — the calculator suggests 15 risers at 7.2 inches each with 10-inch treads, within IRC residential code limits of 7.75-inch max riser.

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