How this wallpaper roll calculator works
Paintable wall area is estimated from perimeter and height, standard openings are removed, then pattern/waste allowance is added before dividing by usable roll coverage.
How to use it
- Room length. Enter the value in ft.
- Room width. Enter the value in ft.
- Wall height. Enter the value in ft.
- Doors. Enter the value that applies to your situation.
- Windows. Enter the value that applies to your situation.
- Usable coverage per roll. Enter the value in sq ft.
- Request the result. Select “Show my result.” No account or email is required.
What to do with the number
Wallpaper labels can show nominal roll area that overstates usable coverage when the pattern has a large repeat. For patterned wallpaper, use a conservative usable-coverage number or increase the pattern allowance rather than relying on raw roll area.
Planning estimate
Use this result as a starting point, not a guarantee. Product specifications, site conditions, manufacturer guidance, local codes, taxes, labor, tolerances, and rounding can change the real requirement or cost.
