Wallpaper Calculator
Rolls needed, allowing for pattern repeat.
Enter your values
ⓘ Live results
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.
Worked example
Using the values the calculator loads with:
Inputs
- Room perimeter48 ft
- Wall height9 ft
- Pattern repeat12 in
- Roll width20.5 in
- Roll length33 ft
Results
- Rolls needed10
- Total drops29
- Usable drops per roll3
- Drop length with repeat10 ft
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.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.