Free calculators and unit converters for general and everyday use.
Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can calculate material consumption viz., cement, sand, stone gravel for the following concrete mix ratios - 1:1.5:3, 1:2:4, 1:3:6, 1:4:8, 1:5:10. Once, the quantities are determined, it is easy to estimate the cost of a concrete block, driveway, patio, yard or any other structure with the price prevailing in your area.
To find the amount of ready mix concrete for a slab, you can estimate it with a standard volume calculator.
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Example calculation Estimate the quantity of cement, sand and stone aggregate required for 1 cubic metre of 1:2:4 concrete mix.
Ans. Materials required are 7 nos. of 50 kg bag of cement, 0.42 m3 of sand and 0.83 m3 of stone aggregate.
Our mix-on-site concrete calculation is based on batching by volume (Large construction sites employ batching by weight which is more exact). You can also estimate the quantity of sand and gravel required by weight; Simply multiply the volumetric quantity of sand and gravel with 1400 kg/m3 (bulk density of sand) and 1600 kg/m3 (bulk density of stone) respectively, when calculating in metric units.