๐งป Wallpaper Calculator
Paperable area (excl. openings)30.6 mยฒ
Rolls needed (exact)3.3
Rolls needed (rounded up)4
Enter your room's wall perimeter, ceiling height, the combined area of windows and doors, and your wallpaper roll dimensions to calculate how many rolls you'll need. Handy for estimating purchase quantity before a DIY wallpapering project.
How to use
- Enter the wall perimeter (sum of all wall widths, in meters).
- Enter the ceiling height (in meters).
- Enter the combined area of windows and doors you won't be papering over (in square meters).
- Enter your wallpaper roll's width (cm), length (m), and a waste percentage โ the number of rolls needed is calculated automatically.
FAQ
How do I find the wall perimeter?
It's the sum of the widths of all the walls in the room. For a rectangular room, it's (length + width) ร 2.
What if my wallpaper has a pattern that needs to be matched?
Patterned wallpaper with a repeat typically wastes more material due to pattern matching. Consider increasing the waste percentage to around 15-20%.
What's a typical wallpaper roll size?
European-style wallpaper commonly comes in rolls about 53cm wide, while Japanese-style rolls (as used in the default values here) are commonly 92cm wide and about 10m long per roll.