The knowledge about "civil engineering" provided by Er. Md Faiz Ali through this plateform is absolutely correct and verified based on practical knowledge and good experiences.

# Calculate the quantity of Bricks for messionory work

First of all we should assume Mortar ratio {Cement + Sand (Thickness)}

• Suppose Mortar Ratio is  1:6   (cement=1, sand=6)

mortar thickness = 10mm

• Constants
Density of Cement = 1440 Kg/m3

1m3 = 35.3147 ft3
• Volume of Brick (Without Mortar) = 0.19 x 0.9 x 0.9     = 0.001359 m3
• Volume of Brick ( With Mortar)     = 0.20 x 0.10 x 0.10 = 0.002 m3

### Now We have to determine the total volume of wall for brick work.

• Vol of wall = height * length * thickness
To get actual volume of brick work. subtract the all window and door volume.
Then Total volume of Brick work / volume of brick (with mortar)
You will get accurate number of  brick required.

As for example
Suppose i am having a 20cm thick wall with some dimensions. And there are a gate and window is also available in design. Then we have to find the number of bricks required to built this wall.

We need  :-
1. Total volume of wall
2. Volume of door
3. Volume of window
4. Volume of brick work
5. Volume of brick
6. Number of brick =?

Let’s start and do all the calculation step wise.

STEP-1

Total volume of a wall =   Length × Height × Width

13 × 10 × 0.65617                     20cm=0.65617ft

We change width unit in to feet

85.3021 cft/ft3

STEP-2

Volume of door  =
Length × Height × Width

× 3.5 × 0.65617
We don’t have width of the door so, to determine it’s volume we use width of wall here.

16.07646 cft/ft3

STEP-3

Volume of window  Length × Height × Width

3.5  × 3.5 × 0.65617

8.038 cft/ft3

STEP-4

Volume of brick work  = Total vol – (vol of door + vol of window)

85.3021 – (16.07646 + 8.038)

85.3021 – 24.11446

61.18764 cft/ft3

STEP-5

Volume of brick    =
Length × Height × Width

19cm × 9cm × 9cm

1539 cm3
we have all above units in ft3 so we have to convert cm3 into ft3

0.054349 cft/ft3      without mortar

Volume of brick with mortar = 20cm × 10cm × 10cm

2,000 cm3

0.070629 cft

Finally we don almost calculations now we have to find number of bricks required to build this wall.

Number of brick required  =  vol of brick work ÷ vol of brick

61.18764 ÷ 0.070629

866.32 = 867 Bricks required

Thanks