Wallpaper calculator
Guessing at wallpaper usually ends with a roll too few halfway through the job. Enter the wall dimensions, pattern repeat and roll size and you’ll have the number before you reach the shop.
Wallpaper calculator – how many rolls?
Wallpaper is hung in full drops, so we work out how many drops fit on a roll (roll length ÷ ceiling height + pattern repeat) and how many drops the walls need – giving the right number of rolls even for tall walls and large patterns.
An estimate. A standard roll is often 10.05 × 0.53 m. The pattern repeat is on the wallpaper – large patterns give fewer drops per roll. Buy an extra roll from the same batch as a reserve.
This tool gives an estimate and is an aid – not a finished calculation. Always check the result against drawings, applicable regulations, supplier data and your professional experience before giving a binding price, ordering material or using the file. ByggExp is not responsible for decisions made solely on the basis of the tool.
Want help taking this further?
Briefly describe what you need and we’ll help you with a quote, material and next steps – free of charge. Only the contact field is required.
How to work out the number of rolls
- Work out the wall area to be papered (m²).
- Enter the roll’s area (often about 5 m²).
- Add waste for pattern matching.
- See how many rolls you need.
Tips
Buy all rolls from the same batch (same batch number) so the colour matches, and take an extra roll as a reserve.
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Frequently asked questions
- How many m² does a roll of wallpaper cover?
- A standard roll often covers about 5 m², but it varies – check the wallpaper and enter the value in the calculator.
- Why do I need extra for the pattern?
- Patterned wallpaper needs the pattern matched between drops, which creates more waste. The larger the pattern, the larger the allowance.
- Should I deduct windows and doors?
- For small areas you can use the gross wall area for margin. For large openings you can deduct them, but always keep some reserve.
- Does it cost anything?
- No, the calculator is free and requires no account.