Wallpaper Calculator
Calculate how many wallpaper rolls you need for a wall area.
Assumptions used in this calculation
- Standard roll size: Assumes a standard single roll size (~56 sqft), double and triple rolls are sold with different coverage, adjust the coverage-per-roll input to match your chosen product.
- Waste covers pattern matching: The 15% default waste allowance is higher than typical paint/tile waste specifically to cover pattern-matching losses, large-repeat patterns should use an even higher allowance.
About this calculator
The wallpaper calculator divides total wall area (with a waste allowance for pattern matching and trimming) by the coverage of a standard roll to find how many rolls to buy.
Worked example
400 sqft wall, 56 sqft rolls, 15% waste allowance
Result: 9 rolls
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