RoofingCalc: Roof & Shingle

A quick roofing estimator for contractors, roofers and DIY homeowners. Enter the measurements of your roof and see how much material to order. • Up to 8 roof sections (gable, hip or shed), each with its own length, width, pitch and overhang • Imperial (feet, rise per 12) or metric (meters, pitch in degrees) with one tap • Total roof area with a waste margin up to 30%, adjusted for pitch, plus roofing squares and the pitch factor • Material list: shingle bundles, ridge cap, starter strip, underlayment rolls (synthetic, #15 or #30 felt), drip edge pieces and roofing nails • Optional unit prices for each item give an estimated total cost • Area breakdown for every roof section • Share the material list as text from the results • Save each job as a named scenario with notes, reload it later, and undo an accidental delete Quantities use typical package coverage for architectural shingles at three bundles per square. Valleys, dormers, chimneys and skylights are not modelled, so add extra waste for complex roofs. Always confirm with your product data sheet and local code.