Get precise requirements for cement bags, sand (CFT/m³), aggregate, and water for any structural element. Our advanced concrete mix calculator supports M15 to M25 grades with built-in RCC reinforcement steel and cost estimation.
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Learn the science behind material estimation and how to use our advanced concrete calculator for maximum accuracy on your site.
When mixing concrete, the dry materials (cement, sand, aggregate) occupy more space than the final wet mixture. We use a Dry Volume Factor of 1.54. This means 1m³ of wet concrete requires 1.54m³ of dry ingredients.
For M20 grade concrete (1:1.5:3 ratio), you typically need about 8.2 to 8.5 bags of 50kg cement per cubic meter of wet concrete, depending on the aggregate size and water-cement ratio.
For a standard M20 mix, you will need approximately 15.7 CFT (0.44 m³) of sand and 31.4 CFT (0.89 m³) of aggregate per cubic meter of wet concrete.
The standard density of cement is 1440 kg/m³. For reinforcement steel, the density used is 7850 kg/m³, though our calculator use percentage-based estimation for quick site checks.
