About
Professional construction tools. Free for everyone.
BuildCalc Pro is a free construction calculator platform 31 tools across 7 trades, running entirely in your browser.
What it is
A calculator platform, not a sales funnel
BuildCalc Pro started from a simple observation: contractors do the same construction math every day concrete yards, block counts, rafter lengths, bid margins and most of the tools for it are either expensive, ad-choked, or wrong. We built the tool we'd want on the jobsite.
31 free calculators
Concrete, masonry, framing, roofing, finishes, excavation, MEP, and bid math every tool free to use, with no feature locked behind a paywall.
Private by design
There is no database, no account, and no login. Your estimates live only in your browser's local storage, on your device, under your control.
Instant results
Every calculation runs 100% in your browser. Type your dimensions and the results update live no waiting on a server, no page reloads.
Built for the field
For contractors, builders, estimators, tradespeople, and homeowners anyone who needs practical construction math without the subscription.
Honest about what it isn't
BuildCalc Pro is a planning aid, not an engineering firm. Our calculators use standard industry formulas and clearly stated assumptions but they don't replace a licensed engineer, your local building code, or your own judgment. See the disclaimer for the full picture.