Mixed Height Wallpaper Roll Allocation calculator.
Allocate straight-match wallpaper drops of different heights to rolls after repeat rounding and initial alignment loss.
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.
Allocate straight-match wallpaper drops of different heights to rolls after repeat rounding and initial alignment loss. Does not use half-drop rules or mix incompatible rolls. Roll count is a heuristic allocation.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Roll length
- 10 m
- Initial alignment loss per roll
- 0 m
- Vertical straight repeat
- 1 m
- Combined trimming allowance per drop
- 0 m
- Measured covered height
- 6 m
- Drops at this height
- 2
- Measured covered height
- 4 m
- Drops at this height
- 2
Rolls for this allocation: 2 rolls
Longest-first first-fit allocation; feasible, not guaranteed minimum. Straight-match only; half-drop and incompatible lots 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 use half-drop rules or mix incompatible rolls. Roll count is a heuristic allocation.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-04. Calculation and review policy.