Wallpaper Rolls Calculator
Work out how many wallpaper rolls a room needs, allowing for pattern repeat, doors and windows, free online.
About this calculator
Strips needed = room perimeter ÷ roll width (rounded up). Each strip is the wall height plus the pattern repeat. The number of strips per roll is the roll length ÷ strip length, and rolls = strips ÷ strips per roll. Openings reduce the strips slightly; a spare roll is wise.