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Free Wallpaper Calculator

Estimate how many wallpaper rolls you need, allowing for pattern repeat and waste.

Strips needed are the total wall width divided by the roll width, rounded up. Each strip is the wall height plus any pattern repeat and 4 inches of trim, the roll gives whole strips of that length, and rolls equal strips divided by strips per roll, plus waste.

How to use the Wallpaper Calculator

  1. Enter the measurements of the area you are working on.
  2. Read the amount of material needed, including a waste allowance where relevant.
  3. Round up when you buy, and check the figures with your supplier.

About the Wallpaper Calculator

Estimate how many wallpaper rolls you need, allowing for pattern repeat and waste.

Home and building jobs are easier to price when you know how much material you really need. A quick estimate also helps you avoid buying too little or too much.

Getting started with the Wallpaper Calculator

Using the wallpaper calculator takes a minute or two. Your entries are saved in this browser, so you can come back later and carry on.

Tips for better results

Window and door openings are not deducted, which gives a small cushion. Buy all rolls from one batch number and keep a spare for repairs.

Add 5 to 10 percent for waste, cuts and mistakes.

Measure twice, order once, and check quantities with your supplier.

Privacy and where your data goes

Everything you type into the wallpaper calculator stays on your own device. Zapxa does not receive your numbers or documents. If you clear your browser data, your saved entries will be removed, so download a PDF of anything you want to keep.

Frequently asked questions

How does pattern repeat affect the number of rolls?

Each strip needs extra length to line up the pattern, so fewer strips fit on one roll. Enter the repeat to see the rolls increase.

Are windows and doors subtracted?

No. Openings are not deducted, so the estimate covers small openings and the cuts around them.

Is the wallpaper calculator free?

Yes. It is free to use with no signup, no watermark and no usage limits.

Is my data private?

Yes. Your inputs are processed in your browser and saved only in its local storage. They are not uploaded to our servers.

Does it work on mobile?

Yes. Zapxa works on phones, tablets and desktops. Use the print button or download a PDF to keep a copy.

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