Easy Way to Calculate Brickwork Quantity for Buildings

Calculating the quantity of bricks needed for a building project can seem tricky at first. But with a clear method and some simple math, you can figure out the amount of brickwork required without confusion. This helps avoid delays and extra costs during construction. Here’s a straightforward guide to help you calculate brickwork quantity efficiently.

Brick wall under construction with visible rows and mortar joints

Understand What You Need to Measure

Before starting any calculations, you need to know the exact dimensions of the walls or structures where bricks will be used. This includes:

• Length of the wall

• Height of the wall

• Thickness of the wall (usually one brick thick or more)

  
  

For example, if you have a wall that is 10 meters long, 3 meters high, and one brick thick, these numbers will form the basis of your calculation.

Calculate the Volume of the Brickwork

The next step is to find the volume of the brickwork in cubic meters. Multiply the length, height, and thickness of the wall:

```

Volume = Length × Height × Thickness

```

Using the example above:

```

Volume = 10 m × 3 m × 0.23 m = 6.9 cubic meters

```

Here, 0.23 meters is the standard thickness of a single brick wall (one brick length).

Know the Size of a Single Brick

Bricks come in standard sizes, but it’s good to confirm the size you will use. A common brick size is:

• Length: 190 mm (0.19 m)

• Width: 90 mm (0.09 m)

• Height: 90 mm (0.09 m)

  
  

Calculate the volume of one brick including the mortar space. Mortar joints usually add about 10 mm (0.01 m) to each dimension. So, the brick with mortar size becomes approximately:

• Length: 0.20 m

• Width: 0.10 m

• Height: 0.10 m

  
  

The volume of one brick with mortar is:

```

Brick volume = 0.20 m × 0.10 m × 0.10 m = 0.002 cubic meters

```

Calculate the Number of Bricks Needed

Divide the total volume of the brickwork by the volume of one brick with mortar:

```

Number of bricks = Total brickwork volume ÷ Volume of one brick with mortar

```

Using the previous numbers:

```

Number of bricks = 6.9 ÷ 0.002 = 3450 bricks

```

This means you will need approximately 3450 bricks to build the wall.

Account for Waste and Breakage

It’s practical to add extra bricks to cover breakage, cutting, and wastage during construction. A common practice is to add 5% to 10% more bricks.

For 5% extra:

```

Extra bricks = 3450 × 0.05 = 172.5 bricks

```

Total bricks needed:

```

3450 + 173 ≈ 3623 bricks

```

Rounding up ensures you won’t run short during the build.

Adjust for Different Wall Thicknesses

If your wall is thicker than one brick, multiply the thickness accordingly. For example, a 1.5 brick thick wall has a thickness of:

```

1.5 × 0.23 m = 0.345 m

```

Recalculate the volume with this thickness and follow the same steps.

Consider Openings in Walls

Windows and doors reduce the amount of brickwork needed. Measure the total area of these openings and subtract their volume from the total wall volume before calculating bricks.

For example, if the wall has a window 2 meters wide and 1.5 meters high:

```

Window area = 2 m × 1.5 m = 3 square meters

Window volume = 3 m² × thickness (0.23 m) = 0.69 cubic meters

```

Subtract this from the total volume:

```

Adjusted volume = 6.9 m³ - 0.69 m³ = 6.21 m³

```

Then calculate bricks based on this adjusted volume.

Summary of Steps

• Measure wall length, height, and thickness

• Calculate total brickwork volume

• Find volume of one brick including mortar

• Divide total volume by brick volume to get brick count

• Add 5-10% for waste

• Subtract volume of openings like windows and doors

  
  

This method keeps calculations clear and manageable, helping you plan brick purchases accurately.