How Many Wallpaper Rolls You Need
Rolls = wall area (m2) / area per roll. At about 5 m2 per roll, a 25 m2 wall needs 25 / 5 = 5 rolls (round up and add a margin for pattern matching).
Open the interactive Everyday Lifestyle tool →Formula: rolls = area m2 / per-roll m2
Key facts
| Formula | rolls = area m2 / per-roll m2 |
|---|---|
| Area per roll | 5 m2 |
| 25 m2 wall | 5 rolls |
| Advice | round up + add margin |
Frequently asked questions
How many rolls for a 25 m2 wall?
About 5 rolls at 5 m2 per roll: 25 / 5 = 5. Round up and add extra for pattern repeats.
Should I subtract windows and doors?
You can, but a small margin is safer for trimming and pattern matching.
What if rolls cover more area?
Use the actual per-roll coverage from the product spec instead of the 5 m2 default.
Related pages
Wallpaper Rolls Calculator is part of Everyday Lifestyle on GOAT Lab — a free reference you can use without signing up, and it works offline. Open the tool above for any custom value.
Part of GOAT Lab — 26 free, browser-based science, engineering and developer tools. No sign-up.