Specified Stair Runner Length calculator.
Turn specified riser, tread and landing runs into one runner length with separately entered end allowances.
Your inputs
Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.
A clear estimate starts here.
Enter your dimensions and product details to see the quantity and purchase breakdown.
Formula and assumptions
How this calculation works.
Turn specified riser, tread and landing runs into one runner length with separately entered end allowances. Covering takeoff only; no stair layout, fixing or accessibility recommendation.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Combined end allowance
- 0.2 m
- Supplier order length increment
- 0.5 m
- Covered tread count
- 10
- Covered riser count
- 11
- Specified covered tread path
- 0.3 m
- Specified covered riser path
- 0.2 m
- Landing path length
- 1 m
Runner order length: 6.5 m
Use measured paths including any specified nosing treatment. Runner width, seams, fixing and stair suitability are not chosen.
Before you purchase
Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.
Covering takeoff only; no stair layout, fixing or accessibility recommendation.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.