🗒️ Wallpaper Calculator
Rolls needed for any room
About this calculator
Wallpaper math trips up even careful DIYers because of pattern repeats. Enter your wall dimensions, the roll width and length, and the pattern repeat, and the calculator figures out how many full strips you get per roll and how many rolls the room needs — accounting for the extra length each strip consumes to match the pattern from strip to strip.
Tip: buy all rolls from the same dye lot (check the batch number) so the colour matches across every wall.