Construction Calculators
Stair Calculator

Stair Calculator

Calculate stair with Calculator 360 using the available inputs.

Total floor-to-floor rise

Maximum horizontal run

Rise and run unit

Minimum riser height you choose Editable example range, not a building-code requirement.

Maximum riser height you choose Editable example range, not a building-code requirement.

Minimum tread depth you choose Editable example range, not a building-code requirement.

Maximum tread depth you choose Editable example range, not a building-code requirement.

Riser and tread unit

Floor thickness (optional) Enter together with the opening length for a geometric headroom estimate.

Stair opening length (optional)

Try an example

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How to use this calculator

Explore whole-step stair geometries within the riser and tread ranges you enter. The displayed selection uses only those ranges. This geometric tool does not check building code requirements.

Enter your own values and units, then check the assumptions shown with the result.

Geometry is selected from the limits you enter. Consult applicable building requirements for a real project.

Frequently asked questions

What does this calculator estimate?

Explore whole-step stair geometries within the riser and tread ranges you enter. The displayed selection uses only those ranges. This geometric tool does not check building code requirements.

Which values does it use?

It uses the values entered in the form. No live rate, price, tax, or code requirement is retrieved.