Wallpaper Roll Calculator
Construction & DIYCalculate the number of wallpaper rolls needed for rooms and accent walls, deducting doors and windows, and factoring in pattern repeat waste for perfect pattern matching.
Net wall area 417 sq ft · roll coverage 56.4 sq ft
About this calculator
Ordering wallpaper requires precise measurement to avoid running short of a specific dye lot or overpaying for excess rolls. Unlike paint, wallpaper has pattern repeats (straight match or drop match) that create vertical trimming waste between drops.
This calculator computes net wall area, deducts door and window openings, factors in pattern repeat waste, and determines the exact number of standard single, double, or euro rolls required.
How It Works & Formula
Usable strip length = Wall Height + Pattern Repeat. Strips per Roll = floor(Roll Length / Usable Strip Length). Total Strips Needed = ceil(Total Wall Perimeter / Roll Width). Total Rolls = ceil(Total Strips Needed / Strips per Roll).
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