The calculator returns the minimum whole number of rolls by area.
Home & Construction calculator
Wallpaper Calculator
Use measured wall area and roll coverage for a compact material estimate before ordering wallpaper.
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No account. Formula and assumptions are shown below.
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Wallpaper rolls details
Formula & disclaimer
Rolls = Ceiling(((Wall Area β Openings) Γ (1 + Waste)) Γ· (Roll Width Γ Roll Length))
View assumptionsFormula reviewCalcs at Hand Editorial TeamVerified 31 August 2026 Β· automated checks included
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How to read this result
Three useful checks, kept deliberately short.
42 mΒ² of wall, 6 mΒ² of openings, 0.53 m Γ 10 m rolls and 15% waste: Subtract openings Β· Add the waste allowance Β· Divide by roll coverage and round up.
Large pattern repeats, short usable strips and wall-height constraints can require more rolls than an area-only estimate.
Formula and assumptions
Rolls = Ceiling(((Wall Area β Openings) Γ (1 + Waste)) Γ· (Roll Width Γ Roll Length))This compact method estimates by roll area.
Keep in mind: Check batch numbers, pattern repeat, usable strip length and manufacturer coverage before ordering.
Produced byCalcs at Hand Editorial Team
Last formula check31 August 2026
Review methodKnown examples + boundary cases
Editorial and correction policy β