Staircase Calculator

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Staircase Calculator

Calculate stair dimensions including number of steps, riser height, tread depth and stringer length for your staircase project.

Total Rise (in)

in

Total Run (in)

in

Preferred Riser Height (in)

in

Tread Thickness (in)

in

Number of Steps

0

Actual Riser Height0

Actual Tread Depth0

Tread Depth (incl. nosing)0

Stringer Length0

Stair Angle0

About Staircase Calculator

Building code typically requires riser heights between 4" and 7.75" with a maximum variation of 3/8" between steps. Tread depth should be at least 10" for residential stairs. The calculator divides total rise by the preferred riser height and adjusts to find equal steps.

The stringer (carriage) length is calculated using the Pythagorean theorem based on total rise and total run. Stringer boards are typically 2x12 lumber. Always check local building codes before construction.