Wallpaper Calculator
Getting wallpaper quantities wrong is expensive — off-cuts are wasted and rolls from different batches may not match. This calculator gives a precise quantity with pattern repeat accounted for.
Wallpapering Tips
Pattern Repeat
A pattern repeat requires you to match the pattern at joins, wasting some paper at the top of each drop. Large pattern repeats (30cm+) can increase your material requirement by 25–30%.
Batch Numbers
Always buy all rolls from the same batch. Rolls from different batches can have subtle colour differences that become visible after installation. Buy one extra roll and keep it as a repair reserve.
Straight vs Cross Match
Straight match: pattern repeats at the same height on both strips. Half drop: pattern on one strip starts halfway down relative to the next. Half drops waste more paper.
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