Professional Construction Calculators

20+ free calculators for accurate material and labor estimates. Get instant results for any construction project.

Select a Calculator to Begin

Choose from 20+ professional construction calculators to get instant material and labor estimates for your project.

Free construction calculators for contractors

These free calculators turn job measurements into material quantities, labor and a total price for 20 trades. They are made by ContractorAI. ContractorAI is an AI estimating, invoicing and CRM app for contractors, available for iPhone and iPad. The same calculators are built into the app, where you can save the estimate, send it as a branded PDF and turn it into an invoice.

Trade guides: roofing · plumbing · electrical · HVAC · painting · all pricing guides

Calculator questions

Are these contractor calculators free?

Yes. All of the calculators on this page are free to use in your browser with no signup. To save estimates, send them to customers as branded PDFs and turn them into invoices, use the ContractorAI app for iPhone and iPad ($34.99/month after a 7-day free trial).

How accurate are the calculator results?

The calculators turn your measurements into material quantities with a waste factor and apply typical unit prices and labor. Treat the result as a starting estimate: replace the default prices with your supplier's prices and your own labor rate before you quote a customer.

Which trades are covered?

Concrete, roofing, decks, siding, fencing, gutters, electrical, plumbing, HVAC, drywall, painting, flooring, tile, doors and windows, foundations, framing, excavation, pavers, retaining walls and junk removal.

Turn Calculations Into Professional Estimates

Save your calculations and turn them into professional estimates and invoices with the ContractorAI app for iPhone and iPad.

Try ContractorAI Free for 7 Days