Construction Calc: Estimator

The only offline calculator you need on the job site.
No internet? No problem. Contractor Calc works 100% offline — so you get fast, accurate material estimates right when you need them.

Estimate 8 key materials in seconds:
Concrete (slabs, footings)
Drywall (sheets with waste)
Paint (gallons & liters)
Roofing (squares with pitch)
Gravel & Mulch (cubic yards/m³)
Tile (tiles with cuts)
Insulation (ft²/m²)
Stairs (riser, tread, stringer)

Built for pros, trusted by contractors:
• Feet-Inch-Fraction Input — enter 12' 6" like you measure
• Imperial & Metric — switch units in Settings
• No subscriptions. No ads. No cloud.
• All calculations stored locally — your data stays private

Perfect for:
• Residential & commercial contractors
• Carpenters, framers, roofers, painters
• DIYers tackling big projects
• Estimators preparing bids

Join thousands of builders who ditched spreadsheets and paper calculators.
Get precise, professional results — every time.