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.