Wall coverings
Wallpaper Calculator
Estimate full vertical drops rather than dividing wall area by roll area—the method that prevents pattern matching surprises.
Preparing calculator...
How to calculate it
- Calculate room perimeter from length and width.
- Enter roll width, roll length, and vertical pattern repeat.
- The calculator rounds every drop to a full repeat before counting rolls.
Frequently asked questions
Why does pattern repeat increase rolls?+
Every strip must begin at a matching point, so part of each roll becomes an unusable offcut. Larger repeats generally create more waste.
Should I subtract doors and windows?+
Large openings can be subtracted for area planning, but full drops around them may still be required. Keep a waste allowance for these cuts.