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Roof Shingle Calculator

Estimate roofing squares and shingle bundles from measured roof area or simple roof dimensions. Add optional waste to plan a more realistic asphalt shingle order.

Use measured roof area when you already know the roof surface. Use footprint and pitch for a quick estimate from simple dimensions.

sq ft

Enter measured roof surface area, not interior floor area.

%

Leave blank or enter 0 for the base count only. Use around 10% for a simple roof and more for cut-heavy layouts.

Assumes standard asphalt shingles that cover one roofing square with 3 bundles. Ridge caps, starter strips, underlayment, and flashing are separate materials.

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