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Tools / Wallpaper calculator

Part of the topic: 🏠 Home, energy & car

Wallpaper calculator: how many rolls?

Enter the room size and the roll format. The calculator counts strips per roll, so pattern repeats and offcuts are included.

✓ Free · ✓ no sign-up · ✓ no cookies · ✓ runs in your browser

Rolls needed
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Strips = room perimeter ÷ roll width (rounded up), reduced proportionally for doors and windows; strip length = wall height + 10 cm trimming + pattern repeat. Buy one spare roll from the same batch.

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🔒 Runs entirely in your browser – nothing you enter is uploaded or stored.

How to use it

  1. Enter room length, width and wall height.
  2. Add the area of doors and windows.
  3. Check the roll size (Euro roll 0.53 × 10.05 m) and pattern repeat.
Your inputs live only in the link, not on our server.

Last checked: October 2026 · Based on: Euro roll 0.53 m × 10.05 m (EN 233). Found a mistake? Use the form below – we fix confirmed errors and update the date.

Frequently asked questions

How many rolls for a 4 × 3 m room?

With 2.5 m walls, a standard Euro roll and no pattern repeat about 8–9 rolls (14 m perimeter ÷ 0.53 m ≈ 27 strips, 3 strips per roll) – fewer if you deduct doors and windows.

Why count strips instead of m²?

Offcuts at the end of each roll can't always be used; counting whole strips per roll is more realistic.

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