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One roofing square = 100 sq ft of roof surface. Roof area = footprint × pitch factor. 3 bundles of shingles = 1 square (100 sq ft). Add 10–15% waste for cuts and overlap.
Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.
What is a roofing square?
A roofing square equals 100 square feet of roof surface. Materials are ordered in squares. A 2,000 sq ft roof = 20 squares.
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