The fastest, most accurate free concrete calculator.
concretecalucator.site was created to help contractors, DIY homeowners, and builders calculate concrete volumes quickly and accurately. Whether you're pouring a small patio slab or planning a large foundation, our tools give you the exact quantities you need — in cubic yards, cubic feet, number of bags, and total weight.
Our calculations use the standard concrete density of 150 lb/cu ft (2,400 kg/m³). Actual weight varies slightly by aggregate type and mix design. We use industry-standard bag yield values (0.30, 0.375, 0.45, and 0.60 cu ft for 40, 50, 60, and 80 lb bags respectively). Always verify specifications with your concrete supplier.
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