Calculate the number of wallpaper rolls needed for any room, accounting for pattern repeat.
This wallpaper calculator works out how many rolls you need for a room, taking into account the wall height, doors, windows and the pattern repeat. It handles both standard European/UK rolls (10 m × 0.52 m) and US rolls, in metric or imperial.
| Roll type | Size |
|---|---|
| UK / EU standard | 10 m × 0.52 m |
| US single roll | ~33 ft × 27 in |
A standard 10 m roll gives about four 2.4 m drops. A room needing 20 drops therefore needs 20 ÷ 4 = 5 rolls – add one more roll if there's a large pattern repeat.
A typical 4×4 m room with 2.4 m ceilings needs about 8-10 standard rolls depending on pattern repeat.
Pattern repeat is the distance between identical points in the wallpaper design. Larger repeats mean more waste per drop.
Always buy 1-2 extra rolls for mistakes and future repairs. The same batch may not be available later.
Measure the width of each wall and the floor-to-ceiling height, then add them for the total wall area. Note the pattern repeat too, as it affects how many usable drops you get from each roll.
Start from a plumb vertical line near a focal point or the largest wall, not a corner, as corners are rarely straight. Work away from the main window so any overlaps are less visible.
