In this article i will tell you how to calculate bricks in a wall. By the explanation describe below, you can make your own MS Excel Brick calculator program to calculate bricks in a wall.
 We know that standard dimensions of brick is 9 inch x 3 inch x 4.5 inch.
 Convert these dimensions into feet.
 Now multiply these dimensions to get volume of a brick.
 0.75 feet x 0.25 feet x 0.375 feet = 0.0703125 cubic feet.
 Bricks required for 1 cubic feet brickwork will be (1/0.070) = 14.285 bricks
 10% space of brickwork is covered by mortar.
 Subtract 10% bricks from 14.285, 14.2851.4285=12.85 bricks.
 Add 5% wastage of bricks.
 5% of 12.85 is 0.64 bricks.
 Add 0.64 and 12.85 to get number of bricks in 1 cubic feet, we get 0.64 + 12.85 =13.492 bricks or we can say that 13.5 bricks.
Number of bricks in 100 Cubic feet brickwork
As we know that there are 13.5 bricks in 1 cubic feet. So in 100 cubic feet there will be 1350 bricks.
Bricks per square foot
Wall thickness 
Bricks per square foot 
4.5 inch  5.0625 bricks 
9 inch  10.125 bricks 
13.5 inch  15.1875 bricks 
Bricks per square meter
Wall thickness 
Bricks per square meter 
4.5 inch  57.16 bricks 
9 inch  114.329 bricks 
13.5 inch  171.49 bricks 
How to calculate bricks in a wall ?
To calculate bricks in a wall, we need to know the dimensions of the wall. For instance, if a wall is 10 feet long with 10 feet height and 9 inch thickness. Then we can find its bricks in a following way. Multiply dimensions of wall. 10 feet x 10 feet x 0.75 feet. We will get 75 cubic feet. We have seen above that there are 13.5 bricks in 1 cubic feet brickwork. So there will be 75 x 13.5 =1012.5 bricks in 75 cubic feet. In this way we calculate bricks in any wall with the known dimensions.
Bricks calculation formula
Bricks calculation formula is written below.
In feet

Length of wall in feet x height of wall in feet x thickness of wall in feet x 13.5 = number of bricks
In meter

length of wall in meter x height of wall in meter x thickness of wall in meter x 500 = number of bricks
Number of bricks in 1 Cubic meter brickwork
Standard dimensions of brick in metric units are 225 x 112.5 x 75 mm.
 multiply these dimensions to get volume of a brick, 0.225 m x 0.1125 m x 0.075 m=0.00189 cubic meter.
 In one cubic meter, number of bricks will be (1/0.00189)=529.1 bricks.
 10% of brickwork will be covered by mortar.
 Subtract 10% bricks from the 529.1, we will get 529.152.91=476.20 bricks.
 Add 5% wastage of bricks.
 5% of 476.20 is 23.80 bricks.
 Add 23.80 and 476.20 to get number of bricks in one cubic meter brickwork.
 23.80+476.20=500 bricks.
If you have any question, feel free to ask questions in the comment section.
Vivek says
great combination of mathematics and engineering!