Stair calculator (embed)

Stair calculator

The same maths as Stairs in the MeisterCalc app: its three modes, its Advanced settings and its Riser Limited option. Millimetres or feet and inches.

This calculator needs JavaScript, which is turned off or didn't load. You can still do it by hand: the formulas and worked examples below give the same answers.

Units

Millimetres Feet and inches

What do you know?

Rise only Rise + run Run only

Total rise

Finished floor to finished floor.

Going

One tread, nosing to nosing, measured level.

Advanced: desired riser, floor thickness, headroom, Riser Limited

Desired riser height

Sets the count in Rise + run, and the cap with Riser Limited.

Floor / joist thickness

Upper floor, flooring to ceiling lining.

Headroom height

Clear height above the nosing line.

Riser Limited: round the riser count up, so no riser is taller than the desired riser

Check against

Each country's limits are quoted, with sources, under the calculator.

Calculator by MeisterCalc: formulas and worked examples on the full page.