Stair Calculator

This tool helps you calculate the key parameters for building a staircase, such as the rise, run, number of steps, and stringer length, based on your project's dimensions.

Stair Layout Calculator

Total Rise (Overall Height)

Run (Tread Depth)

Total Run (Horizontal Distance)

Stair Terminology

Rise (Riser): The vertical height of a single step. A common maximum is 7.75 inches.
Run (Tread): The horizontal depth of a single step where you place your foot. A common minimum is 10 inches.
Total Rise: The total vertical distance the staircase needs to cover, from the lower finished floor to the upper finished floor.
Total Run: The total horizontal distance the staircase will occupy.
Stringer: The structural support board that runs along the side of the staircase, holding the treads and risers.
Headroom: The vertical clearance from the top of a tread to the ceiling above it. A common minimum is 6 ft 8 inches.