Stair Calculator
Calculate stair dimensions including number of steps, rise, run, and total stringer length. Ensures IBC/IRC code compliance.
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Calculator insights
What this calculator does
Stair Calculator helps you quickly estimate calculate stair dimensions including number of steps, rise, run, and total stringer length. ensures ibc/irc code compliance. with clean output and clear next steps.
How the calculation works
Enter Total Rise (floor-to-floor), Desired Riser Height, Desired Tread Depth and this calculator uses standard formulas to determine Number of Steps and Actual Riser Height. The output is displayed immediately in a user-friendly format.
Example calculation
For example, enter realistic values into the Stair Calculator to see how the calculator produces Number of Steps and Actual Riser Height that you can use for planning and comparison.
Disclaimer
The calculations provided by this website are for informational purposes only and should not be considered financial, legal, tax, or professional advice.
Frequently Asked Questions
What are code-compliant stair dimensions?
IRC requires: max 8.25" riser, min 9" tread, max 3/8" variation between steps. Optimal comfort is 7" rise × 11" run.