Roofing Calculator & Estimator

Instant roofing answers on the job site: bundles per square, sheets per bunk, pitch, sheathing, metal, dumpster size and full estimates. Feet or metres. Offline.

Smart Roofing Calculator - Job Site Estimator

120+ roofing calculators in one offline app: roof area, pitch, shingle bundles, sheathing, metal, flat roofs, framing, ventilation and full cost estimates. Feet or metres. English and Spanish. No login, no subscription.

QUICK ANSWERS PEOPLE SEARCH FOR EVERY DAY

• How many bundles of shingles in a square, and for 1,000 / 1,500 / 2,000 sq ft
• How many sheets of plywood or OSB in a unit (bunk), by thickness, with H-clips and weight
• How many feet a bundle of ridge cap or starter strip covers
• How many roofing nails per square - count, pounds and coil boxes
• Roof pitch chart: every pitch 1/12 to 24/12 with degrees, percent and multipliers
• How many step flashing pieces per foot
• How long a roof lasts, and the year to plan its replacement

MEASURE AND MATERIALS

• Roof Area Estimator - length, width and pitch to sq ft, m2 and squares
• Roof Pitch Calculator and camera Pitch Finder
• Shingle, Waste, Starter Strip and Ridge Cap estimators with product presets
• Plywood / OSB Sheathing, Underlayment, Ice and Water Shield
• Cedar Shake and Shingle Calculator (16, 18 and 24 inch products)
• Drip Edge, Valley, Flashing, Skylight and Chimney Cricket
• Metal Roof Panels, Metal Roof Screws and Closures, Minimum Slope check
• Flat / Rubber Roof (EPDM, TPO, modified bitumen), Roof Coating and Roof Paint coverage
• Gutter, Downspout, Gutter Size and Flat-Roof Slope (quarter inch per foot)
• Roof Truss count and cost, Rafter Length, Gambrel / Barn, Hip, Shed, Saltbox, Octagon
• Ventilation planner (1/150 and 1/300 net free area, soffit and ridge vents)
• Shed Roof Materials Kit - shingles, sheathing, underlayment, drip edge and nails from the footprint

COSTS AND ESTIMATES

• Full Roof Estimate and a step-by-step Project Wizard
• Roof Replacement, Tear-Off and Leak Repair cost, Repair vs Replace advisor
• Tear-Off Weight and Dumpster Size - tons of debris and the right roll-off
• Soffit and Fascia, Labor Hours, Cost by State and City, Roof Depreciation (ACV)
• Snow Load, Wind, Hail and Ice-Dam risk tools

BUILT FOR THE JOB SITE

• Works 100% offline
• Feet or metres: switch on the Home screen
• English and Spanish
• Save estimates, export PDF quotes, build a material list (Job Cart)
• Bright, readable light theme; dark theme on request
• Links from smartroofingcalculator.com open the same tool in the app

GUIDES AND ARTICLES Installation guides (shingles, drip edge, flashing, ridge vent, underlayment, leak repair), OSB vs plywood, shingles vs metal, ice dam prevention, coating, insulation, ventilation, maintenance, inspection checklist, warranty guide, cost per square and labor cost per square.

ROOF TYPES SUPPORTED Asphalt shingles (3-tab, architectural, designer), metal panels and standing seam, cedar shakes, clay and concrete tile, slate, flat and low-slope membranes, hip, gable, gambrel, shed and complex roofs.

WHO IT IS FOR Roofing contractors quoting on site, estimators and remodelers, inspectors and adjusters, and homeowners planning a repair or a new roof.

Estimate smarter, quote faster. One offline app for every roofing measurement, quantity and cost.