Carpet Roll Length calculator.
Plan carpet strips by roll width, room direction and any specified pattern repeat.
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.
Each room is divided into full-width strips in the direction you choose. Pattern rounding and extra cut length apply to every strip. Different rooms can have different directions.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Available roll width
- 4 m
- Lengthwise pattern repeat
- 0 mm
- Extra length per strip
- 200 mm
- Waste allowance
- 0 %
- Length
- 5 m
- Width
- 6 m
- Strip direction
- Along room length
Carpet roll length to purchase: 10.4 m
No cross-room offcut optimisation or seam-placement recommendation is included.
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.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.