Civil engineering calculators

Concrete Volume CalculatorFree concrete calculator for slabs, footings, columns, stairs and curbs. Get m³ or yd³, premix bags, cement, sand, aggregate and truck loads.Rebar Weight CalculatorFree rebar weight calculator for BS 4449 (6–40 mm) and ASTM A615 (#3–#18) bars: kg or lb, slab mesh bar counts, stock bars, laps, cut waste and cost.Brick & Block CalculatorFree brick and block calculator: number of bricks or concrete blocks for walls with openings, plus mortar, cement bags and sand, in metric or imperial.Gravel & Aggregate CalculatorFree gravel calculator: tonnes, cubic metres and bags for driveways, paths and sub-base, with compaction, waste, truck loads and cost.Excavation & Earthwork CalculatorFree excavation and earthwork calculator: dig volume for pits, trenches and sloped sides, soil swell and shrinkage, weight, truck loads, fill and cost.