Staircase Calculator

Calculate stair dimensions including number of steps, riser height, tread depth, stringer length, and angle. Checks building code compliance.

1.6Kuses

7.7/10(182)

Total Rise (inches)

Target Riser Height (in)

Tread Depth (in)

Stair Width (in)

Number of Steps

Riser Height

7.71"

Tread Depth

10.00"

Stringer Length

169.0"

Total Run

130.0" (10.8 ft)

Angle

39.7°

Risers / Treads

14 / 13

Rise + Run

17.7"

Building Code Check (IRC)

Riser height (4"-7.75")PASS (7.71")

Tread depth (min 10")PASS (10.00")

Comfort (Rise+Run = 17-18")IDEAL (17.7")

Stair Building Code

IRC code: max riser height 7.75", min tread depth 10", min width 36". Rise + Run should equal 17-18" for comfort. Minimum headroom 80".

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