Stair Calculator

Estimate riser count, actual riser height, and tread count.

Lay out a simple straight stair plan from total rise and a target riser.

Your inputs stay on your device

Plan stair dimensions

live result

Total risein

Tread run

Horizontal run for one tread.

Target riserin

Risers

Actual riser

11.11 in

Treads

Home-project results are planning estimates. Measure your space and confirm material specifications before buying.

Context & Reference

For a rough straight-stair layout.

calculator guide

Rounds target risers up, recalculates riser height, and counts treads.

Use this calculator with your own values, then review the clearly labelled result and copy it when you need it elsewhere.

Total run equals entered tread run times tread count.

Use a 105-inch rise and a 7-inch target riser.

This is a layout estimate, not a code check.

This calculator runs locally in this browser. This is a layout estimate, not a code check.

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