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Roofing Calculator
Calculate roof area, roofing squares, shingle bundles, and total cost from your building footprint and roof pitch.
Input Parameters
Roof Area (sq ft)
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Roofing Squares
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Shingle Bundles
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Estimated Cost
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Detailed Breakdown
Pitch Multiplier
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Base Area
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Waste Area
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Felt Rolls (15#)
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Drip Edge (ft)
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Nails (lbs)
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About This Calculator
This roofing calculator converts your building footprint to actual roof area using pitch multipliers. A roofing "square" covers 100 sq ft, and each square typically requires 3 bundles of standard three-tab shingles. The waste factor accounts for cuts, valleys, and hips.