Wallpaper Calculator

Work out how many rolls of wallpaper you need for your room.

Calculate Wallpaper Needed

Add up all wall lengths. Subtract width of doors and large windows.

Check wallpaper label. Plain wallpaper = 0. Pattern repeat adds wastage.

Standard UK wallpaper roll (as of July 2026): 10.05 m long × 0.53 m wide, about 5.33 m² per roll. Each drop is cut with a 100mm trimming allowance, and patterned paper is rounded up to a whole number of pattern repeats so strips line up, which is where offcut waste comes from. The result already includes 1 spare roll for batch matching and future repairs. Always buy every roll from the same batch number.

How This Calculator Works

UK wallpaper typically comes in standard rolls:

  • Length: 10.05 metres
  • Width: 0.53 metres (53 cm)
  • Coverage: 5.33 m² per roll (before wastage)

Pattern Repeat Explained

Pattern repeat is the distance before the pattern repeats vertically. It's printed on the wallpaper label (e.g. "64 cm repeat").

Why it matters: You must line up patterns across strips. A 64 cm repeat with 2.4 m walls means you'll waste offcuts from each roll.

  • Plain/no pattern: Only the trimming allowance is wasted
  • Small repeat (under 30 cm): A little extra waste rounding each drop up to the repeat
  • Large repeat (over 50 cm): More waste, as each drop rounds up to a full repeat

Tips

  • Buy all rolls from the same batch (batch numbers printed on label)
  • Keep one extra roll for future repairs
  • Chimney breasts and bay windows need extra

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