# Calculation of the numbers of cement bags in 1 Cum

In this civil engineering video tutorial, you will learn the method for working the numbers of cement bags in one cubic meter.

Suppose, the nominal mix is 1:2:4

2% is considered for the wastage of cement

Output of mix is taken as 66%

For 1 cum output, the quantity of dry mix will be as follow :-

1/0.66 = 1.5151 or 1.52 (approx)

After the inclusion of 2% wastage, the value will be changed to (1.52 + 0.02) = 1.54 cum

The following formula is used to work out the volume of cement :-

Volume of cement = (Cement / Cement + Sand + Aggregate) x Dry Mix

The sum of ratio = 1+2+4 = 7

The ratio of cement = 1

After putting the above value, we get the following output :-

= (1/1+2+4) x 1.54 = 0.22 cum

So, the volume of cement = 0.22 cum

We know, the density of cement = 1440 kg/cum

The weight of 1 bag cement = 50 kg

Therefore, the volume of 1 bag cement = 50/1440 = 0.0347 cum

So, required numbers of cement bags will be calculated as follow :-

Volume of cement / volume of 1 cement bag = 0.22 / 0.0347 = 6.34 bags or 6.5 bags (approx)

Therefore, the number of cement bags in one cubic meter = 6.5

To get more details, go through the following video tutorial.

Video Source: Civil Study