Concrete Calculators
Get every concrete job right with our dedicated concrete calculators. Work out the volume for slabs, footings and foundations, the cement, sand and aggregate quantities for any mix ratio, how many bags you need, the rebar to reinforce it and the total cost of the pour.
Each tool supports both metric and imperial units and includes a waste allowance, so you order the right amount of ready-mix or materials first time. Choose a calculator below to get started.
Concrete Calculators(15)
Concrete Calculator
Calculate how much concrete you need for slabs, footings, columns and walls in cubic yards or metres.
Concrete Mix Calculator
Work out the cement, sand and aggregate (ballast) quantities for a concrete mix by volume and ratio.
Concrete Footing Calculator
Calculate the concrete volume and number of bags needed for strip, pad and pier footings.
Concrete Cost Calculator
Estimate the total cost of concrete for a slab, footing or footpath from the volume and your price per cubic yard or metre.
Cement Calculator
Calculate the number of cement bags, sand and aggregate needed for a concrete or mortar mix by ratio.
Concrete Block / CMU Calculator
Calculate the number of concrete blocks or CMUs needed for a wall plus mortar requirements.
Rebar Calculator
Calculate the number of rebar pieces, total length, and weight for slabs, footings, and walls.
Reinforcing Mesh Calculator
Work out how many sheets of steel reinforcing mesh (A142, A193, A252, A393) you need for a slab, allowing for overlaps.
Block Fill Calculator
Estimate the concrete or grout needed to fill the cores of concrete blocks (CMU) for a wall, in bags or cubic metres.
Concrete Steps Calculator
Calculate the volume of concrete and number of bags needed to pour a flight of concrete steps from the rise, run and width.
Concrete Weight Calculator
Estimate the weight of a concrete slab, footing or volume from its dimensions, using standard concrete density.
Screed Calculator
Calculate floor screed volume plus sand and cement quantities for any floor area and thickness.
Post Hole Calculator
Calculate concrete and gravel needed for setting fence or deck posts in the ground.
Foundation Calculator
Calculate concrete, rebar, and formwork needed for strip, pad, or raft foundations.
Shed Base Calculator
Work out the concrete, paving slabs or gravel and sub-base for a shed base, sized to fit your shed.