Free OnlineCalculators & Converters
Wallpaper Calculator
Calculate how many rolls of wallpaper you need. Accounts for pattern repeat, roll dimensions, doors, and windows.
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Key Features — Wallpaper Calculator
Pattern repeat allowance
Door and window deductions
Configurable roll width and length
Strip count and roll count
Why Use This Tool — Wallpaper Calculator
Free Online Wallpaper calculatorHow many rolls of wallpaper do i need — for EveryoneFast & Easy Wallpaper roll calculatorWallpaper pattern repeat calculator — 100% Free
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Lightning Fast
Get instant results with zero wait time. No server delays, no loading screens.
Works Everywhere
Use on any device — desktop, tablet, or phone. No downloads or plugins needed.
Frequently Asked Questions — Wallpaper Calculator
How many rolls of wallpaper?
Divide perimeter by roll width for strips needed. Divide roll length by (wall height + repeat) for strips per roll. Divide and round up.
What is a pattern repeat?
Vertical distance before the pattern repeats. More repeat = more waste per strip. Plain wallpaper has zero repeat.
Standard roll size?
US: 27" wide × 15 ft (single) or 33 ft (double). European: 20.5" × 33 ft.