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. Add your email, then select “Email & show my result.”
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.