Stair Calculator

Number of steps, exact riser height, and total run for a staircase.

Total rise (floor to floor)

Preferred riser height

Tread depth

How it works

Number of risers = total rise ÷ preferred riser height, rounded. The exact riser height divides the rise evenly. A common comfort rule says twice the riser plus the tread should be 60 to 66 cm. Local building codes may differ.

FAQ

Is this calculator free?

Yes. No signup is needed and nothing you enter is stored.

Is the result exact?

Results are rounded for display. For financial, medical, or legal decisions, confirm with a professional.

Do my numbers leave my device?

No. The calculation runs in your browser.