Construction
Stairs Calculator: Dimensions
Calculate stair rise, run, and materials.
Design safe, code-compliant stairs.
Key Measurements
- Rise: 7-7.75" max
- Run: 10" minimum
- Width: 36" clear min
Calculation
Total rise ÷ desired rise = steps.
Rule of Thumb
Rise + Run = 17-18". 2×Rise + Run = 24-25".
Frequently Asked Questions
Max rise?
7.75" per code. 7-7.5" comfortable.
Number of steps?
Total rise ÷ desired rise. Round to whole.
Stair formula?
Rise+Run=17-18". 2×Rise+Run=24-25".