// multi-utility computation suite · offline · instant · precise
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tool.wallpaper-rolls-needed Calculator
Calculates the number of wallpaper rolls needed from wall dimensions and the roll's coverage area, accounting for pattern repeat waste. A 64 cm pattern repeat wastes about 30% of each roll on pattern matching — this prevents ordering short.
Inputs
Room Perimeter Ft
Reference formula or conversion factor shown for context.
Wall Height Ft
Vertical measurement. For health calculators, typically standing height without shoes.
Roll Sqft
Reference formula or conversion factor shown for context.
Pattern Repeat In
Reference formula or conversion factor shown for context.
Results
rolls needed
Sample size or count used in the calculation.
total wall area (sq ft)
The combined total across all inputs and components.
pattern repeat waste
The pattern or structure identified in the data.
sq ft per roll (usable)
Reference formula or conversion factor shown for context.
add 10% for waste
Reference formula or conversion factor shown for context.
tip
Gratuity amount — the suggested amount to add to the bill as a service tip.