Free Tool

Stair Calculator

Enter the total rise (floor to floor) and your target riser height to get an even riser count and a comfortable run per step.

Total rise (in)Target riser height (in)

Number of risers

Actual riser height

Suggested run

Riser count rounds to the nearest whole riser so every step ends up the same height, then recalculates the actual riser height from that count - it will differ slightly from your target. Suggested run uses the common comfort rule "2 x rise + run = 25 inches." Local code sets its own min/max rise and run limits (commonly around 7-3/4" max rise and 10" min run in residential code, but this varies) - always verify against your local building department before building.

This math, built into every bid

Punchlist's reusable cost catalog keeps pricing consistent across every job, not re-guessed each time.