How Much Wallpaper Do I Need?
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Calculating how much wallpaper you may need to cover a wall or decorate a full room can feel a bit overwhelming. So I've created a wallpaper calculator to help.
How do I know how much wallpaper I need for my room?
I understand how this question can lead you to staring at a tape measure, second-guessing pattern repeats, stressing over running out mid-drop, and followed by being frozen with decision overwhelm.
So I’ve built a free wallpaper calculator right on my site to do the heavy lifting for you!
How the Wallpaper Calculator Works
When you're asking yourself, "How much wallpaper should I buy to cover my wall?", my tool gives you a reliable, maximum estimate in just a few clicks.
- Select your wallpaper design: Using the drop down menu select your favourite wallpaper from my collections.
- Wall Dimensions: Simply input your wall height and width in centimentres.
- Smart Buffers: The calculator assumes each wall is solid (ignoring windows and doors) and automatically includes an extra 10% allowance for ceiling and floor trimming.
Calculate how much wallpaper is required
Because the tool calculates for solid walls plus that handy 10% trim margin, the final roll count gives you the absolute maximum amount of wallpaper required. You might end up with a little leftover for future patch-ups or craft projects, but more importantly, you’ll never run out halfway through a project!
Head over to my calculator, plug in your measurements, and get ready to bring your walls to life.
I also sell half rolls of wallpaper
Did you know I also sell wallpaper in half rolls (5 metres) which are not included in the calculator, because quite frankly, it made my brain hurt enough building this one for full 10 metre rolls, without adding that to the mix. But it is worth knowing half rolls are available in case you have smaller project in mind. You can find the option to purchase half rolls as a drop down option in each wallpaper product listing.

