Roofing Calculators
Professional roofing estimation tools for shingle, metal, and plywood deck projects. Calculate material quantities, fasteners, underlayment, and accessories with pitch-corrected surface area formulas.
Shingles
Asphalt shingle bundles, squares, nails, and underlayment for any roof shape
Metal Roof
Standing seam and corrugated metal panel counts, screws, and closures
Plywood Deck
Plywood and OSB sheathing sheets, fasteners, and H-clips for roof decks
Roof Pitch
Roof angle, slope percentage, pitch multiplier, and derived rafter values
Ice & Water Shield
Ice and water shield underlayment for eaves, rakes, and valleys
Snow Load
Roof snow load analysis based on depth, density, and building code values
Pitch-corrected estimates
Accurate surface area
All roofing calculators apply the pitch multiplier to convert your building footprint into the actual sloped roof area. A 6:12 pitch adds 11.8% surface area; a 12:12 pitch adds 41.4%.
Complete material lists
Beyond the primary material, each calculator estimates screws, nails, underlayment, drip edge, H-clips, and closure strips so you can order everything in one trip.