Estimated result
Enter measurements and select Calculate.
Roll estimate
Gross wall area is perimeter × height. Entered openings are subtracted, allowance is applied, and adjusted area is divided by actual roll width × roll length before rounding up.
Pattern limitation
This simple area model does not calculate pattern repeat, drop matching, trim loss, damaged material, or manufacturer-specific usable roll coverage. Increase the editable allowance when appropriate.
Worked example
Enter the example values shown in the calculator to review every intermediate area, allowance, and rounded purchase quantity.