Build Quantities
SoftwareFree construction calculators with metric and imperial units, visible formulas, worked examples, and project-specific assumptions.

About Build Quantities
Build Quantities is a free construction calculation website for homeowners, trades, and estimators. Its calculators cover tasks such as asphalt, brick, concrete, gravel, sand, mulch, fill, rebar, trench excavation, and material package planning.
Each calculator keeps measurement units, formulas, assumptions, and rounding visible. Users can work in metric or imperial units and see the intermediate quantities behind the result. Material values that change by product, supplier, location, or project condition are entered by the user or stated as limitations.
The site also publishes worked examples, reference charts, methodology notes, and practical guides. Quantity estimates support planning and supplier conversations. Project drawings, specifications, local rules, and professional design still control construction decisions.
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