Stair Runner Length CalculatorStep count
Stair runner length calculator for 13 steps
Thirteen risers is the most common count in a two-storey home with 8 ft ceilings, which is why it is the number people search for most.
With a 10 in tread and a 7.5 in riser, 13 steps need 227.5 in — 18 ft 11.5 in, or 5.78 m — before any allowance.
Stair runner calculator
Your stair runner length
20 ft 3.1 in
Total runner required for 13 steps, including a 10% waste allowance.
| Inches | 243.1 in |
|---|---|
| Feet | 20.26 ft |
| Feet & inches | 20 ft 3.1 in |
| Yards | 6.75 yd |
| Meters | 6.17 m |
| Centimeters | 617.47 cm |
Recommended purchase length
21 ft
7 yd · 6.4 m · 252 in
This calculator provides an estimate based on the measurements and installation assumptions you enter. Complex, curved or winder staircases may require professional measurement.
Your measurements, drawn to scale
The 13 step numbers at a glance
Bare length 227.5 in (18 ft 11.5 in). With 5% waste: 238.9 in (19 ft 11 in). With 10% waste: 250.3 in (20 ft 10 in). With a 36 in mid landing and 10% waste: 289.9 in (24 ft 2 in).
Metric equivalent
A 13 step UK flight with a 22.5 cm going and a 19 cm rise needs 5.4 m bare, about 5.9 m with 10% waste.
Check before you order
Count risers, not treads — a flight described as 13 stairs sometimes has 13 treads and 14 risers. The bottom step is also frequently deeper than the rest; measure it separately and enter it as a custom step if so.
Questions people ask
- How much runner do I need for 13 stairs?
- Roughly 19 feet (5.8 m) of runner before waste, or about 21 feet (6.4 m) once a 10% allowance is added.
- Does 13 steps mean 13 risers?
- Not always. Count the vertical faces — each one needs a riser height plus a tread depth of runner.