Roofing Calculators
Roofing math runs on squares (100 square feet) and pitch — two concepts that confuse almost every first-time roofer. These calculators estimate total roof area from footprint and pitch, convert pitch between formats, and size shingle bundles with a stated waste factor. Roofing is safety- and code-sensitive work: treat these as planning estimates and hire licensed help for the installation.
Roofing CalculatorEstimate roofing squares, underlayment rolls, drip edge, and ridge cap for gable or hip roofs.RoofingRoof Pitch CalculatorTurn rise and run into roof pitch (x/12), angle in degrees, slope percent, and area multiplier.RoofingShingle CalculatorConvert roof area into shingle bundles, roofing nails, and ridge-cap bundles with a waste allowance.Roofing
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Roofing FAQs
One square equals 100 square feet of roof area — so a 2,000-square-foot roof is 20 squares. Contractors quote in squares, and shingles are typically sold in bundles with about 3 bundles per square.
Pitch is the vertical rise over a 12-inch horizontal run: a roof that rises 6 inches per foot is 6/12. The roof pitch calculator converts between pitch, angle, and slope, and the roofing calculator uses pitch to compute true roof area.
Estimates are planning guides, not professional advice. Read the disclaimer.