How to calculate cement concrete

 After compltion of your new house construction and now you doing concrete work in front portion of house for your car parking then how to calculate  concrete work and it's  materials 

Consider your vacant portion in front of your house is 15m X 15m and M-15 concrete required M15=1 : 2 : 4

Now calculate volume of concrete,consider thickness of concrete is 0.150m i.e 6 inch

Dry Volume of concrete is 15m X 15m X 0.150 =33.75 cu.mt

Wet volume of concrete is increase 54% due to void=33.75 X 1.54 =51.75~52.00 cu.mt 

Calculate cement Quantity =52.00/(1+2+4)=7.42 X 1 =7.42 cu.mt

 volume of 50 kg cement bag is =0.035cu.mt

Number of 50kg cement bag =7.42/0.035=212.00 number

Calculate sand(fine aggragete) quantity 

=52.00/(1+2+4)=7.42 X 2=14.84 cu.mt

One brass sand =2.83 cu.mt 

So 14.84/2.83=5.24 brass sand require  

Calculate metal (coarse aggragete) Quantity =52.00/(1+2+4)=7.42 X 4 =29.68 cu.mt

So 29.68/2.83=10.48~10.50 brass metal require 

Summary :- for 50 feet by 50 feet vacant plot with 6 inch  thick  concrete following quantity of material  require 

1) cement:- 212 number cement bag 

2) sand / fine aggragete :- 5.50 brass

3) Metal /coarse aggragete :- 10.50 brass