🏠 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 or TPO membrane rolls or GRP kits for a flat roof
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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 gutter needed for a roof based on eaves length
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Hip Roof Area Calculator
Hip roof area from the plan and pitch, with rise, rafter, hip and ridge lengths
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Lead Flashing Calculator
Estimates lead flashing length and weight for chimneys and abutments
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Metal Roofing Calculator
Counts metal roof sheets in whole runs, eaves to ridge
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Ridge Cap Calculator
Counts ridge cap shingles or ridge tiles, and packs, for ridges and hips
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Roof Area Calculator
Calculates total roof area from footprint and pitch
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Roof Flashing Calculator
Counts flashing pieces for drip edge, step flashing or valleys from the length and the coverage per piece
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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
Works out the rough opening to frame for a skylight or roof window from its outside frame size
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Soffit & Fascia Calculator
Calculates linear metres of soffit and fascia around the eaves