Build Quantities

Education

Construction calculators with visible formulas and assumptions

Build Quantities gives homeowners, trades, and estimators free browser-based calculators for asphalt, brick, concrete, gravel, sand, rebar, trench excavation, and other material-planning tasks. Each tool supports metric and imperial measurements and shows units, formulas, rounding, assumptions, and worked examples. Product-, supplier-, and project-specific values remain separate from measured geometry, so users can adjust inputs for their project. The site also publishes methodology notes, reference charts, and practical guides. Results support quantity planning and supplier conversations. Drawings, specifications, local rules, and professional design still control construction decisions.