About WallpaperCalc
WallpaperCalc is a free online tool that answers one simple question: how many wallpaper rolls do you need?
Buying wallpaper is stressful — buy too little and you run out mid-wall (with a different dye lot that doesn't quite match), buy too much and you've wasted money. Our calculator takes your room or wall measurements, your roll size, and the pattern repeat, then tells you exactly how many rolls to buy, including a sensible allowance for cutting and wastage.
What the calculator accounts for
- Room or individual wall measurements
- Doors and windows subtracted automatically
- Pattern repeat (the #1 reason people under-buy)
- Trimming allowance and a 10% wastage buffer
Free, no sign-up
Everything runs in your browser — your measurements are never sent to us or stored anywhere. No account, no email, no tracking of what you type into the calculator.
WallpaperCalc is part of the DreamHomePin family of home-decor resources, made for DIY decorators who'd rather measure twice and buy once.