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Wallpaper Calculator

Estimate the rolls of wallpaper you need for a room. Enter perimeter and ceiling height, deduct doors and windows, and account for pattern repeat to avoid mid-job shortages.

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Wall area (sq m)
30.35
Strips needed
27
Rolls needed
8
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Frequently Asked Questions

  • What is pattern repeat?

    Pattern repeat is the vertical distance after which the design repeats. You waste up to one full repeat at the top of every strip while aligning, so it directly increases roll count.

  • Default roll sizes?

    EU rolls: 10 m × 0.53 m. US rolls: 33 ft × 1.75 ft. We auto-set defaults when you switch unit systems — overwrite if your roll differs.

  • Should I round up rolls?

    The tool already rounds up — you can’t buy half a roll. The waste % adds an extra cushion on top of that.

  • Privacy?

    All math runs locally. Nothing about your room is sent anywhere.