Wallpaper Calculator
Calculate how many wallpaper rolls you need: wall area vs roll size, with waste. Get packs of rolls and repeats in seconds.
About this tool
Enter wall height and perimeter plus the roll dimensions printed on any wallpaper — this calculator returns the rolls to order with waste included.
Wallpaper math inverts intuitive calculation: it is strips per wall, not area per roll. Getting this right before the store run saves a second delivery and the mismatch problem when a pattern is discontinued.
FAQ
How many strips per roll?
Divide roll length by wall height, rounding down. A 10 m roll covers 4 strips of 2.4 m walls after allowing for trimming.
Why add waste?
Pattern matching between strips can use 10-20% extra, and mistakes + repairs need leftover rolls.
What if my pattern is large?
Big repeats (60 cm+) often need a full extra roll — stay on the 10% plus waste unless the pattern is simple.