Roofing Calculators
Shingles, underlayment, metal roofing, and pitch calculators.
Roofing materials are estimated in squares (100 sq ft each). Shingles come in bundles — typically 3 bundles per square for standard 3-tab, or 4 bundles per square for architectural shingles. These calculators account for roof pitch, overhang, and waste so you order the right amount of shingles, underlayment, and trim.
Roofing Shingles Calculator
RoofingCalculate the number of shingle squares, bundles, ridge cap, and roofing nails needed for your roof.
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Roof Pitch Calculator
RoofingCalculate roof pitch, slope angle in degrees, and slope percentage from rise and run measurements.
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Metal Roofing Calculator
RoofingCalculate the number of metal roofing panels, fasteners, and trim needed for a standing seam or corrugated metal roof.
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Roof Underlayment Calculator
RoofingCalculate how many rolls of roofing felt or synthetic underlayment you need, accounting for proper overlap.
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