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Free construction calculators for contractors, builders, estimators, and homeowners. Every tool runs in your browser — no account, no subscription, your numbers never leave your device.

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Estimates are planning aids verify quantities against your local codes and supplier quotes.

Tool category

Concrete, Masonry & Earthwork calculators

Cubic-yard quantities, sack math, rebar and block counts priced with waste before you pour. 5 free calculators below.

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5 calculators

Every tool below is free results update live as you type.

Flatwork
Concrete Slab CalculatorConcrete calculator that figures cubic yards, 80/60-lb bags, and order quantity for slabs, pads, and flatwork, with exact waste built in. Free, no sign-up.Calculates: Cubic yardsUse tool
Footings & Walls
Footing Concrete EstimatorConcrete footing calculator that figures cubic yards, truckloads, and 80-lb bag counts for strip footings, stem walls, and foundations. Free, no sign-up.Calculates: Cubic yardsUse tool
Reinforcement
Rebar & Mesh EstimatorRebar calculator that figures bar counts, spacing grids, 20-ft sticks, steel weight, and tie counts for concrete slabs and footings. Free, no sign-up.Calculates: Linear feetUse tool
Footings & Walls
Sonotube & Pier CalculatorSonotube calculator that figures cubic yards and 80-lb bag counts per pier from tube diameter, depth, and pier count for columns and footings. Free, no sign-up.Calculates: Cubic yardsUse tool
Masonry
CMU Block, Mortar & Core-Fill GroutCMU block calculator for block count, Type S mortar bags, core-fill grout yards, and bond-beam rebar on masonry walls, with waste included. Free, no sign-up.Calculates: Block countUse tool
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