Stair Calculator
Calculate the number of steps, riser height, tread depth, total run, and stringer length for your stairs. Adjust for comfort and code compliance.
Result
Stringer length:
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Stair Building Tips
Building Code
Typical riser height: 7" (18cm). Tread depth: 10" (25cm). Check your local code.
Comfort
A comfortable stair: 2×riser + tread ≈ 24–25" (61–63cm).
Safety
All risers and treads should be equal for safety and comfort.