Wallpaper rolls
Wallpaper rolls: use wall area, usable coverage per roll, waste allowance. Review the formula, worked example and calculation steps.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
Rolls = ceil[area × (1+waste/100)/coverage]
Variables & units
- Wall area
- m² · minimum 0, maximum 1000000000000
- Usable coverage per roll
- m²/roll · minimum 0.000001, maximum 1000000000000
- Waste allowance
- % · minimum 0, maximum 100
Worked example
Use the example inputs to explore this model; the solution shows each supplied quantity.
Assumptions
Supply usable roll coverage after matching the pattern. This is an area estimate, not a cutting plan.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
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