Concrete Ingredients Calculation. For Cement, Sand and Coarse Aggregate. This is a Volumetric Calculation. Assuming we need 2 m 3 of concrete for M20 Concrete Mix, (Mix Ratio, M20 = 1 1.5 3) Total Part of the Concrete = 1+1.5+3 = 5.5 Parts. Therefore, Cement Quantity = (Cement Part Concrete Parts ) Concrete Volume.How heavy is concrete Calculate how many kilograms ( kg - kilo ) of concrete are in 1 cubic meter ( 1 m3 ). Specific unit weight of concrete - amount properties converter for conversion factor exchange from 1 cubic meter m3 equals = 2,406.53 kilograms kg - kilo exactly for the masonry material type. To convert concrete measuring units can be useful when building with concrete and where.