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Stair Calculator

Calculate the number of stairs, riser height, tread depth, and stringer length for any staircase. Includes IRC code compliance check (max 7-3/4" riser, min 10" tread).

Frequently asked questions

What is the standard stair riser height?

The IRC requires a maximum riser height of 7-3/4 inches and a minimum tread depth of 10 inches.

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