Smart Roofing Calculator

30+ Free Roofing Calculators for Shingles, Pitch, Area & Cost

Smart Roofing Calculator is a free suite of 30+ online roofing estimators trusted by homeowners, DIYers, and professional contractors. Quickly calculate roof area, pitch, shingle bundles, ridge cap, plywood sheets, underlayment rolls, drip edge, flashing, valleys, gutters, metal panels, tile, snow load, insulation R-value, and total project cost from the dimensions of your roof. Every tool uses industry-standard formulas with realistic waste factors and is paired with installation guides, cost breakdowns, and DIY tutorials so you can plan, price, and finish your roofing project with full confidence and zero guesswork.