How many rolls of wallpaper do I need?
Measure wall area, subtract big openings, account for roll coverage, and leave room for pattern waste.
Wallpaper is one of those materials where being short by one roll can turn into a real headache, especially if the dye lot changes. Measure carefully and round up.
1. Measure wall length
Add the width of every wall you plan to paper. If you are doing only one accent wall, just measure that wall.
2. Measure wall height
Measure from baseboard or floor to ceiling. If the ceiling is uneven, use the taller measurement for a safer estimate.
3. Subtract large openings
Doors and large windows can be subtracted, but do not cut the estimate too tight. You still need extra material for trimming, matching, and mistakes.
4. Check roll coverage
Use the coverage listed on the wallpaper product. Many double rolls list around 56 square feet, but usable coverage may be lower after pattern matching.
5. Add pattern waste
Plain wallpaper needs less waste. Big repeats, stripes, murals, or complicated corners need more.
Quick formula
((wall length x wall height) - openings) x waste buffer / roll coverage = rolls to buy