About BuildCalc

BuildCalc is a free collection of construction calculators built for the people who actually build things - contractors, tradespeople, DIY homeowners, and project planners.

Reliable Calculations

Our formulas reference industry-standard methods and published material specifications. We use common bag yields, coverage rates, and density values. All results are estimates and should be verified before purchasing.

Built for Builders

We design for contractors on job sites and homeowners planning weekend projects. Fast inputs, instant results, no clutter.

Imperial & Metric

Every calculator supports both unit systems with one-click switching. Your preference is saved automatically.

Always Free

No accounts, no paywalls, no limits. BuildCalc is free to use for everyone, forever.

Our Calculators

BuildCalc covers 8 categories of construction calculations including concrete and masonry, lumber and framing, roofing, flooring, landscape, painting, electrical, and plumbing. Each calculator includes waste factor estimation, cost calculations, and a copyable shopping list.

All calculations are estimates intended for planning purposes. For structural or load-bearing projects, always consult a licensed engineer or building professional.

Contact

Have questions, feedback, or suggestions? We would love to hear from you. Visit our contact page or use the feedback button on any calculator page.