How many rolls of wallpaper do you actually need?
Enter your room's dimensions and get a precise answer in rolls — pattern repeat waste included, no sign-up, no guessing.
Quick reference: common room sizes
Rough estimates at 8 ft ceilings, standard pattern repeat, one door and one window deducted, 30 sq ft per roll. Use the calculator above for your exact numbers.
| Room size | Wall area | With waste | Rolls |
|---|---|---|---|
| Small bedroom (10 × 10 ft) | 284 sq ft | 327 sq ft | 11 |
| Standard bedroom (12 × 12 ft) | 348 sq ft | 400 sq ft | 14 |
| Living room (12 × 15 ft) | 396 sq ft | 455 sq ft | 16 |
| Large living room (14 × 16 ft) | 444 sq ft | 511 sq ft | 18 |
| Master bedroom (16 × 18 ft) | 508 sq ft | 584 sq ft | 20 |
Common questions
How many rolls of wallpaper do I need for a 12x12 room?
A 12×12 ft room with 8 ft ceilings has about 320 sq ft of wall area before doors and windows. After a standard 10% waste allowance and at 30 sq ft of usable coverage per roll, that works out to roughly 12 rolls. Use the calculator above with your exact numbers for a precise figure.
What is pattern repeat and why does it matter?
Pattern repeat is the vertical distance before a wallpaper's design repeats itself. Larger repeats mean more trimming to line up the pattern between adjacent strips, which wastes more material. Small or no repeat needs about 10% extra, while large repeats can need 20–25% extra.
How much wall does one roll of wallpaper cover?
It varies by product, but a single roll typically covers around 25–30 sq ft of usable wall space after trimming and pattern matching, even though the roll itself is larger before waste. Always check your specific product's coverage rating and adjust the "advanced" field above.
Should I buy extra wallpaper rolls?
Yes — buying one extra roll beyond your calculated total is common practice. Wallpaper is dye-lotted, meaning colors can vary slightly between production batches, so having a matching spare on hand for future repairs is much safer than trying to match a discontinued run later.