Wallpaper Calculator
Rolls needed, allowing for pattern repeat.
Enter your values
Results update instantly as you type — no submit needed.
Results
- Rolls needed
- 10
- Total drops
- 29
- Usable drops per roll
- 3
- Drop length with repeat
- 10 ft
Quick answer
Roll count depends on drop length: a standard roll gives fewer usable drops as the pattern repeat grows.
How to use the Wallpaper Calculator
- 1Measure the room perimeter and wall height.
- 2Enter the pattern repeat from the roll label.
- 3Read the number of rolls required.
Frequently asked questions
Why does pattern repeat waste paper?
Each drop must start at the same point in the pattern, so up to one full repeat is trimmed off every drop.
Should I deduct doors and windows?
Only for very large openings. Most decorators paper over the full perimeter to keep the pattern aligned.