Specified Step Surface Cover calculator.
Separate tread, riser and landing areas for covering an already specified stair geometry.
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.
Separate tread, riser and landing areas for covering an already specified stair geometry. Does not choose stair dimensions, accessibility, slip resistance or installation details.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Specified covered width
- 1 m
- Specified tread depth
- 0.3 m
- Specified riser height
- 0.2 m
- Covered tread count
- 10
- Covered riser count
- 11
- Measured landing area
- 2 m²
Total covered surface: 7.2 m²
Geometry comes from your existing plan. Cut layout, nosings, suitability and stair requirements are excluded.
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.
Does not choose stair dimensions, accessibility, slip resistance or installation details.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.