Wallpaper
Estimates wallpaper rolls from wall area, roll width, and pattern repeat.
Rolls needed
9
Usable area per roll
5,30 m²
Area with waste
44,00 m²
rolls = ⌈(area × (1+waste%/100)) / (width × length)⌉. Simple area model (not a strip layout).
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Formula
rolls = ⌈(area × (1+waste/100)) / (width × length)⌉; if pattern repeat > 0, subtract one repeat from roll length
Example: 40 m², roll 0.53×10 m, 10% waste → ⌈44 / 5.3⌉ = 9 rolls
Methodology
Rolls = ⌈(area × (1+waste/100)) / (width × length)⌉. If pattern repeat > 0, subtract one repeat from each roll length. Not paint liters.
Example
40 m², roll 0.53×10 m, 10% waste → ⌈44/5.3⌉ = 9 rolls.