Stair layout

Total rise

Floor-to-floor vertical height (e.g. 9 ft = 108 in).

Run input

Run (tread depth)

Target riser height (optional)

Used to estimate step count; actual riser is recalculated evenly.

Results

Number of steps	—
Riser height	—
Tread depth	—
Total run	—
Stringer length	—
2R + T	—

How to use

Enter total vertical rise with units (floor to floor).
Choose one tread depth or a total horizontal run.
Optionally set a target riser height—the tool divides rise evenly across whole steps.

Disclaimer. Informational only—not building-code or structural advice. Riser/tread limits vary by jurisdiction (IRC and local amendments); verify with a qualified builder or inspector.