Roofing Calculator
A roofing calculator estimates the material needed to cover a roof, accounting for the pitch (slope) which increases actual roof area beyond the building footprint. Roofing material is measured in "squares" — one square covers 100 square feet.
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Pro Tip
Three bundles of standard 3-tab shingles cover one roofing square (100 sq ft). Architectural/dimensional shingles vary — check the bundle coverage on the package.
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Did You Know?
Asphalt shingles — the most common roofing material in North America — last 20–30 years. Metal roofing lasts 40–70 years and reflects more heat, reducing cooling costs.
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