Roofing Calculator - RoofKit

RoofKit is a roofing calculator and roof estimator for contractors, estimators and homeowners. Measure the roof, get squares and a complete materials list, then send a PDF quote and an invoice – all from your phone, right on the job site. Works offline. No account, no subscription.

★ ROOF MEASUREMENT & SQUARES
• Gable, hip and shed roofs, plus L, T and U shapes with wings – valleys and hips are worked out for you
• Single planes: rectangle, trapezoid or triangle, measured from the ground or on the roof
• Different overhang on every eave and rake
• Feet, inches and fractions exactly as you say them: 12' 6 1/2"; metric works too
• Roof area in sq ft, roofing squares, waste and squares to order
• Eave, rake, ridge, hip and valley lengths
• Roof drawing from above: every side named, with its area and pitch – tap a side to edit it

★ SHINGLE CALCULATOR & MATERIALS LIST
• Asphalt shingles (3-tab, architectural, premium): bundles, starter strip, hip & ridge cap, roofing nails
• Metal roofing – standing seam and exposed fastener: panels, screws or clips, ridge cap, closures, trim
• Concrete and clay tile: tiles, ridge tiles, battens, bird stop
• Slate and cedar shakes, plus TPO / EPDM membrane for low-slope roofs
• Underlayment, ice & water shield, drip edge, vents and pipe boots
• Tap any line to see the formula behind it. Every coverage is editable and rounded up to whole packs
• Warning when the pitch is below the minimum slope for the covering
• Pro: send the order list to your supplier – quantities only, no prices

★ ROOF PITCH & RAFTERS
• Roof pitch calculator: x/12, degrees and percent
• Pitch gauge – lay your phone on the roof or a rafter to read the pitch
• Common, hip and valley rafter length, plumb and level cuts, birdsmouth

★ ROOFING ESTIMATE, PDF QUOTE & INVOICE
• Your material prices, labor per square, markup, sales tax, discount and deposit
• Extra work priced from the roof measurements: tear-off and extra layers, decking, gutters and downspouts, gutter guards, ridge vent, valley metal, fascia and soffit, chimney flashing, skylights, steep and two-story charges, dumpster, permit and delivery
• Professional PDF quote with your business details, the roof drawing and signature lines – and your logo with Pro
• Pro: one tap turns an accepted quote into an invoice with its own number, due date and deposit received
• Pro: a saved price list, so every new quote starts with your prices, labor, markup and tax
• See your cost and profit on every job – they are never printed on the quote

★ BUILT FOR THE JOB SITE
• Works offline – no signal needed on the roof
• Big, clear numbers and buttons, light and dark theme
• Your jobs, customers and logo stay on your phone. No sign-up

FREE AND PRO
Free: the roof calculator, squares, the full materials list, rafters, the pitch gauge, PDF quotes with your prices, and 3 saved jobs. The free version shows ads: a short video before each PDF and one small banner on the Home and Jobs screens – never inside the calculator or a quote. Free PDFs carry a small "Made with RoofKit" line.
RoofKit Pro is a one-time purchase, no subscription: no ads, your logo on quotes and invoices, invoices made from your quotes, a saved price list, a customer list, job notes, sending the order list to your supplier, unlimited saved jobs, duplicate jobs, backup file and CSV export. Try every Pro feature free for 7 days – no card needed.

Questions or ideas? Settings → Contact us.

RoofKit gives estimates only. It is not an engineering design and doesn't replace measuring on site. Building codes vary by state and town – check yours before ordering.