Wallpaper Calculator

How many rolls of wallpaper you need, worked out the decorator's way: by strips.

Coming soon to Google Play In review at Google Play; the link appears here when it is live.

Wallpaper Calculator tells you how many rolls to buy using the strip (drop) method decorators actually use, so the offcut at the top of every drop is accounted for, not just the wall area.

Screenshots

Features

How it works

The strips needed are the room's perimeter divided by the roll width, rounded up. Each roll gives the roll length divided by the wall height in full-height strips, rounded down. The rolls to buy are the strips needed divided by the strips per roll, rounded up.

Honest limits

Patterned papers with a large repeat need extra length per drop; allow more for pattern matching.

Questions

How many rolls of wallpaper do I need?

Count the strips (the room's perimeter divided by the roll width) and how many full-height strips one roll gives; divide and round up. Wallpaper Calculator does this for you.

Why not just divide the wall area by the roll area?

Because the offcut at the top of each drop can't be reused for a full strip. The strip method counts whole drops, so it doesn't leave you short.

Is Wallpaper Calculator free?

Yes. It is free with ads and works offline.

Private and offline

Runs entirely on your phone and works offline. No account, no sign-up, and your data stays on your device. The app shows ads through Google AdMob; see the privacy policy. Privacy policy.

Free, with ads.