Stair Tread Design Calculator

• Free online stair tread design calculator
• Enter the total rise and total run to automatically compute the number of steps, riser height, tread depth, stair angle, stringer length, and more
• Building-code compliant, with metric/imperial units and ready-made presets (residential, public, outdoor, basement) for indoor and outdoor stairs

1. Open the tool page — no installation needed
2. Pick the unit system (metric/imperial) and a preset, then enter the total rise, total run, desired riser and tread depth
3. Results update in real time as you type; click "Copy" to save the result summary to your clipboard if needed

• This tool is completely free and requires no sign-up
• All calculations run locally in your browser — your data never leaves your device

Free online stair tread design calculator. Input total rise and total run to automatically calculate number of steps, riser height, tread depth, stair angle, stringer length, and more. Supports metric/imperial units, building code compliance check. Perfect for indoor and outdoor stair design.

Open the tool page — no installation needed Pick the unit system (metric/imperial) and a preset, then enter the total rise, total run, desired riser and tread depth Results update in real time as you type; click "Copy" to save the result summary to your clipboard if needed

This tool is completely free and requires no sign-up All calculations run locally in your browser — your data never leaves your device

Yes, Stair Tread Design Calculator is completely free. No download or installation required — it runs right in your browser.