Stair Runner Calculator

How long of a stair runner do I need?

steps
in
in
in
in
ft

Order this much of runner

22linear feet

Adds 1 in per step to wrap the nosing and 5% for fitting. Rounded up to whole feet.

ONE TREAD13 steps, 10 in tread, 7.5 in rise20 ft of runner
Exact length20 ft
Each step uses18.5 in
Wood showing each side4.5 in

A runner climbs every tread and riser and wraps the nose. Measure one step and count them.

How it works

Steps × (tread + riser + 1 in for the nose), plus any landing, plus 5%, rounded up to whole feet.

Before you order

  • Center the runner and mark the reveal on each stair.
  • Use a pad cut narrower than the runner so edges stay crisp.
  • Don't let a loose runner create a trip hazard; secure it at every tread.

Common questions

How wide should a stair runner be?

Often 2 to 4 in of wood shows on each side. On 36 in stairs, a 27 in runner is a common choice.

How do I measure the tread?

Measure one step from the back of the tread to the front of the nose, and the height of one riser. Check a few, since older stairs vary.