Wallpaper Calculator
Calculate Wallpaper Rolls
Formula
Rolls = (Perimeter × Height - Openings) / Roll Coverage
Frequently Asked Questions
How much wallpaper do I need?
Calculate total wall area (perimeter × height), subtract doors (~21 sq ft each) and windows (~15 sq ft each). Divide by usable coverage per roll (typically ~56 sq ft for a standard American single roll, minus ~15% waste).
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