Wallpaper calculator

Count rolls the way decorators do — by strips — so pattern matching never leaves you short.

Wallpaper Calculator

Total wall width (ft)

Wall height (ft)

Roll width (in)

Roll length (ft)

Pattern repeat (in)

Rolls to buy7

Strips needed26

Strips per roll4

How it works

Strips needed = total wall width ÷ roll width, rounded up.
Strips per roll = roll length ÷ (wall height + pattern repeat), rounded down.
Rolls = strips needed ÷ strips per roll, rounded up. Doors and windows are not deducted, which leaves a safety margin.

Example: Walls totalling 44 ft wide and 8 ft high with 20.5 in × 33 ft rolls and no repeat need 26 strips, 4 per roll = 7 rolls.

Yes — buy one spare from the same batch number in case of damage or future repairs.

The vertical distance before the design repeats. Larger repeats waste more paper per strip.