\In order to calculate the required quantity of Cement, Sand, Coarse Aggregates and water for M20 grade of concrete we have to follow 6 simple steps.

**1. Assumptions**

Volume of concrete = 1 m³

Grade of concrete **M20** (1:1.5:3)

**2. Find-out the Quantity of concrete (****Wet volume & Dry volume)**

Wet volume of concrete = 1 m³

Here, wet volume is nothing but Volume of the concrete after mixing with water.

** ∵ Dry volume = Wet volume x 1.54 **(You can also take it as 1.50 to 1.55, But it became standard practice to considering 1.54 as multiplication factor).

Dry volume of concrete = 1 x 1.54 =1.54 m³

**3. Find-out quantity of Cement**

**∵ **Quantity of cement = (Dry volume of concrete x cement ratio)/(sum of the ratio)

Cement = (1.54 x 1)/(1+1.5+3)=**0.28 m³**

**∵ Density of Cement = 1440 kg/m³**

Weight of Cement = 1440 x 0.28 = **403.2 Kg**

**∵ 1 bag of cement contains 50 kg of cement**

Number of bags = 403.2** **Kg/50 kg = 8.064 ≅** 8 No’s**

**4. Find-out quantity of Sand**

∵ Cement : Sand :: 1:1.5

**Quantity of sand =Quantity of cement x 1.5**

∴ Quantity of Sand = 0.28 x 1.5 =** 0.42 m³**

**∵ 1m³=35.3147 Cubic Feet (CFT)**

Quantity of sand = 0.42 x 35.3147 = **14.832 CFT**

**∵ **Weight of sand = volume x density, Density of Sand = 1600 kg/m^3

∴ Weight of sand= 0.42 x 1600= ** 672 kg (****0.672 tonnes)**

5. Find-out quantity of Coarse Aggregates

5. Find-out quantity of Coarse Aggregates

∵ Cement : Coarse Aggregates :: 1:3

**Quantity of Coarse Aggregates =Quantity of cement x 3**

∴ Quantity of Coarse Aggregates = 0.28 x 3 =** 0.84 m³**

**∵ 1m³=35.3147 Cubic Feet (CFT)**

Quantity of Coarse Aggregates = 0.84 x 35.3147 = **29.664 CFT**

**∵ ****Weight of sand = volume x density,** **Density of Coarse Aggregates = 1520 kg/m^3 **

∴ Weight of Coarse Aggregates = 0.84 x 1520 = ** 1276.8 kg (1.28**** tonnes)**

**6.Find-out quantity of water**

Assume *water cement ratio as 0.50*

Quantity of water = 403.2 x 0.50 =** 201.6 Liters**

**Watch the video in the below link for better understanding and detailed explanation.**

**How to calculate Quantity of Cement, Sand, Aggregate & Water in M20 concrete?**