Free Staircase Calculator
Calculate Stair Rise, Run & Number of Steps
Floor to floor height
Code max: 7.75″
Code min: 10″
📋 Stair Building Code
- Max Riser: 7.75″
- Min Tread: 10″
- Ideal: 2×Rise + Run = 24-25″
❓ Staircase Calculator FAQ
How do you calculate stair steps?
Steps = Ceil(Rise ÷ 7). Actual Riser = Rise ÷ Steps. Tread = 10-11\”.
What is standard stair rise and run?
Rise: 7-7.75\” max. Run: 10\” min. 2×Rise + Run = 24-25\”.
How many steps for 9 foot ceiling?
108\” ÷ 7 = 15-16 steps. Total run at 11\” = 14-15.4 ft.
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