Calculate how many rolls of wallpaper you need for any room. Accounts for doors, windows, and pattern repeat waste. Supports both American and European standard roll sizes.
Estimates only — pattern matching and wall irregularities may require additional material.
Wallpapering a 12×14 foot room with 8-foot ceilings, 2 doors, and 2 windows? Net wall area is 344 square feet. With American standard rolls (50 sqft usable, no pattern repeat), you need 7 rolls. With a large pattern repeat, that jumps to 10 rolls. At $30–$80 per roll, materials run $210–$560 without pattern repeat, or $300–$800 with a large repeat.
| Room Size | Wall Area | Rolls (no repeat) | Rolls (large repeat) |
|---|---|---|---|
| 10×10 | 248 sqft | 5 | 7 |
| 10×12 | 280 sqft | 6 | 8 |
| 12×14 | 344 sqft | 7 | 10 |
| 14×16 | 408 sqft | 9 | 11 |
| 16×20 | 504 sqft | 11 | 14 |
Measure the total wall area (perimeter × height minus doors and windows), then divide by the usable coverage per roll — about 50 sqft for standard American rolls with no pattern repeat, less with pattern matching.
An American standard single roll covers about 57 gross square feet, but usable coverage is about 50 sqft after trimming. European rolls cover about 55 gross sqft.
Pattern repeat is the vertical distance before the wallpaper design repeats. When hanging, you must align the pattern between strips, which means cutting off excess material. A 12-inch repeat can waste 15–20% more wallpaper per roll.
Budget wallpaper runs $15–$30 per roll. Mid-range designer prints cost $30–$80. Premium or handmade wallpaper can exceed $100–$300 per roll.
Yes — always order 1–2 extra rolls beyond the calculated amount. You may need them for mistakes during installation or future repairs. Matching a pattern from a different batch is nearly impossible.
Typical Results
💡 Always buy 1–2 extra rolls and keep them — dye lots change between print runs and matching later is often impossible.
Common Mistakes