Stair Calculator

Get the exact number of steps, riser height, total run and stringer length for your staircase — and check it against residential building code.

in
Measure from the top of the lower floor to the top of the upper floor.
in
For the total run: effective tread = tread depth - nosing.

📏 IRC code check

Warns when risers exceed 7.75 in or treads are under 10 in.

🏗 Stringer length

Know the exact cut length for your stair stringers.

📎 Angle included

See the staircase angle from rise and run.

🔒 Private

All calculations run locally in your browser.

Frame your project

More framing and construction calculators to plan your build.

LVL Beam Span → Joist Span Concrete

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