🏠 Roofing
Roofing calculators
Pitched-roof area, shingle and tile count, underlayment, rafter length, gutter runs, hip roof, metal roofing, ridge cap, flashing and ventilation.
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Flat Roof Material Calculator
Calculates EPDM, TPO, or modified bitumen for flat roofs
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Roof Furring Strip Calculator
Calculates furring strips for metal roof or board-and-batten installation
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Gutter Calculator
Estimates linear feet of gutters and downspouts needed for a roof
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Hip Roof Area Calculator
Calculates total hip roof surface area from footprint and pitch
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Metal Roofing Calculator
Calculates metal roof panels by area
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Ridge Cap Calculator
Calculates ridge cap shingles or cap pieces by ridge length
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Roof Area Calculator
Calculates total roof area from footprint and pitch
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Roof Flashing Calculator
Estimates step flashing, drip edge, and valley flashing needed
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Roof Pitch Calculator
Calculates roof pitch in rise/run format and converts to angle
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Roof Vent / Ventilation Calculator
Calculates required roof ventilation NFA per IRC 1:300 rule
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Roofing Underlayment Calculator
Estimates synthetic underlayment, felt, or ice and water shield rolls needed
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Asphalt Shingle Calculator
Calculates asphalt shingles by squares (100 sq ft)
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Skylight Opening Calculator
Calculates rough opening dimensions for skylights