How many rolls of wallpaper do I need?
Enter one wall run, subtract the door and window area, then add repeat and waste before you place the order.
3 rollsRecommended buy
83.9 sq ftAdjusted coverage
Wall width14.2 ft feature wall
Ceiling height8.5 ft usable height
Pattern repeat20.5 in straight match
Use the wall you are actually covering
Run one room or one feature wall at a time. If two walls have noticeably different heights, calculate them separately instead of averaging the room.
Open measuring guidePattern & roll
20.5 in
Straight
56.4 sq ft
Coverage before waste: 56.4 sq ft per roll.
Openings deducted
Doors21.0 sq ft
Windows15.8 sq ft
When not to subtract every opening Wall area summary
Total wall area120.7 sq ft
Openings deducted-36.8 sq ft
Adjusted coverage83.9 sq ft
Roll layout & yield
| Roll | Coverage per roll | Cumulative coverage | Status |
|---|
You need 3 rolls to cover 83.9 sq ft after repeat and waste.
Shopping summary
Buy 3 rolls Keep the same lot if you may need a repair strip later.
Wallpaper3 rolls
Coverage needed83.9 sq ft
Total coverage169.2 sq ft
Overage85.3 sq ft
Print shopping list Calculate wallpaper rolls needed
Use the calculator when you want one answer that already includes repeat loss, waste margin, and the openings worth subtracting.
Calculate number of wallpaper rolls needed
Different wall heights and large repeat patterns change the count quickly. That is why the quick math should still end with a round-up.
How to calculate how many rolls of wallpaper I need
Measure first, subtract only obvious openings, then compare the adjusted area with the real roll yield instead of the label headline.
How the calculator works
See the order for room size, openings, pattern repeat, and final roll yield.
Measuring guide
Take cleaner wall, door, and window measurements before you buy wallpaper.
Pattern basics
Read repeat size, straight match, and drop match without second-guessing the label.
Planning tips
Keep the room sequence, seam placement, and same-lot shopping list organized.
FAQ
Short answers for common wallpaper roll calculator questions and measurement mistakes.