Staircase Calculator
Calculate rise, run, and stringer length
in
in
Formula
Rise + Run ≈ 25" (rule of thumb)
IRC code: max 7.75" rise, min 10" run.
Examples
108" rise, 7.5" risers
14 risers, ~17.5" run each.
Frequently Asked Questions
About Staircase
Calculate staircase rise, run, and stringer dimensions.