Stair Calculator
Calculate risers, tread depth, stair angle and stringer length from floor height and available run.
🛡 Privacy-first⚡ Fast🔓 No signup📱 Mobile friendly
Dynamic diagram
⚠️ Results are estimates for takeoff and planning. Do not use them as a substitute for structural design, specifications or local building codes; consult a qualified professional when required.
🔎 Calculate stair rise, run and number of steps
Enter total floor-to-floor height and the available horizontal run to estimate the number of risers, tread depth and stair angle.
The visual diagram helps explain the result, but final stair dimensions must follow applicable building codes and project requirements.
- Riser count and riser height.
- Tread depth and stair angle.
- Visual stair profile and approximate slope length.
💡 Useful information
Calculate stair risers, tread depth, number of steps, slope angle and approximate stringer length from floor height and available run.
- Runs directly in a modern browser.
- Works on phones and desktop computers.
- Reuse it without creating an account.
ℹ️ How to use
- Enter your data or choose the required file.
- Adjust the available options.
- Run the tool and review the result.
- Copy or download the result when needed.
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