Width on a narrow staircase
| Stair width | Runner width | Reveal each side |
|---|---|---|
| 28 in | 20–22 in | 3–4 in |
| 30 in | 22–24 in | 3–4 in |
| 32 in | 24 in | 4 in |
| 34 in | 24–27 in | 3.5–5 in |
Below 3 inches of reveal, reconsider
A reveal narrower than about 3 inches per side reads as a badly fitted carpet rather than a runner. On very narrow stairs, full-width carpet is often the better-looking choice.
Steep stairs need shallow pile
- Deep pile visually softens the nosing edge, which is exactly what you cannot afford on a steep flight.
- Choose a dense low loop or short cut pile so the step edge stays legible.
- Contrast binding along the edges helps define the tread line.
- Wrap the nosing rather than a waterfall drop — waterfall hides the edge on steep stairs.
Know your numbers in 30 seconds
Enter your step count, tread depth and riser height — the stair runner calculator gives you the exact length to order, in metres and feet, with waste included.
Open the stair runner calculatorExtra material to allow
Steep flights have taller risers, so the length per step is higher than the usual assumption. A staircase with 8.5in risers and 9in treads still needs roughly 18 inches per step once the nosing is wrapped — do not assume shallow treads mean less material.
Winders on cottage stairs
Narrow cottage staircases nearly always turn on winders. Measure each winder at its widest point, treat every winder as a separate cut piece, and add 15% waste rather than 10%.
Whatever you decide, get the numbers first: the stair runner calculator doubles as a stair runner length calculator, adding nosing wrap, landings, winders, pattern repeat and waste so you order the right length the first time.
Frequently asked questions
How wide should a runner be on narrow stairs?
Aim to keep 3 to 4 inches of exposed tread each side. On a 30in staircase that means a 22 to 24 inch runner.
Are runners safe on steep stairs?
Yes, when the pile is short and dense, the nosing is wrapped, and the runner is fixed at every step. Avoid deep pile, which obscures the step edge.
Do steep stairs need more runner material?
Often yes — taller risers add length per step even though the treads are shallower. Measure both dimensions rather than assuming.
Know your numbers in 30 seconds
Enter your step count, tread depth and riser height — the stair runner calculator gives you the exact length to order, in metres and feet, with waste included.
Find my runner width