This post will show you **how to calculate materials for 3” brickwork**.

Most of the brick walls in residential buildings are **5”** and **10”** thick.

Yet we often need to use 3-inches thick brickwork as partition walls and some other finishing items.

So it’s essential to learn the technique to calculate materials for 3”-thick brick walls.

After discussing the technique, I’ll show you a quick tip to calculate the required materials.

So, let’s first see…

## How To Calculate The Quantity Of Brickwork In A 3-Inches Thick Wall?

Let’s say, you have a wall like this:

This is an example of a **3 inches thick** brick wall.

To calculate the brickwork quantity:

**First**, Calculate The Area Of The Wall.

The formula is,

= **Length × Height**

= 12’-4” × 10’-0”

= 123.33 square feet.

**Next**, Calculate The Area Of The Opening.

The formula is,

= **Length of the opening × Height of the opening**

= 3’-4” × 7’-0”

= 23.33 square feet.

**Finally**, Get The Quantity Of Brickwork.

And, the formula is,

= **Area of the wall – Area of the opening**

= 123.33 – 23.33

= **100 square feet**.

## How To Calculate The Number Of Bricks For 3” Brickwork?

For that:

**First**, Calculate The Volume Of The Brickwork.

The area of the brickwork is **100 **square feet (*we calculated this above*).

And, the thickness of the three-inches thick wall is actually **2¾″** (0.229′).

So, the volume of the brickwork will be,

= 100 × 0.229′

= 22.90 cubic feet.

**Next**, Calculate The Volume Of A Brick (*including mortar*).

We know, the standard size of a brick is **9½″×4½″×2¾″**.

Normally, half-inch thick mortar layer is used for bricklaying. So, the size of brick including mortar will be **10″×5″×2¾″**.

So, the volume will be,

= 10″ × 5″ × 2¾″

= 137.50 cubic inches.

Or, 0.08 cubic feet.

**Finally**, Calculate The Required Number Of Bricks.

And, the formula is,

**= Volume of the brickwork ÷ Volume of a brick (***including mortar***)**

= 22.90 ÷ 0.08

= 286 nos.

## How To Calculate The Quantity Of Mortar For 3” Brickwork?

For that:

**First**, Calculate The Volume Of A Brick.

That is,

= 9½″ × 4½″ × 2¾″

= 117.56 cubic inches.

Or, 0.068 cubic feet.

**Next**, calculate the total volume of the required number of bricks.

The formula is,

= **Required number of bricks × Volume of a brick**

= 286 × 0.068

= 19.44 cubic feet.

**Now**, Calculate The Required Volume Of Mortar.

The formula is,

= **Volume of brickwork – Volume of the required number of bricks**

= 22.90 – 19.44

= **3.46 cubic feet**.

## How To Calculate Required Cement Quantity For 3” Brickwork?

For that:

**First**, Calculate The Dry Volume Of Mortar.

The required mortar volume for our brickwork is 3.46 cubic feet (*We calculated this above*).

But that is the **wet volume of mortar**.

We need to calculate the dry volume of that.

And, the dry volume is,

= 3.46 × 1.33

= 4.60 cubic feet.

** Read More:** Dry Volume Of Cement Mortar: Everything You Need To Know

**Next**, Calculate The Volume Of Cement In The Mortar

The formula is,

= **(Dry volume of mortar ÷ Sum of ratio) × Cement ratio**

= (4.60 ÷ 5) × 1

= 0.92 cubic feet.

[*Note:**Most of the time, 1:4 cement-sand ratio is used to prepare mortar for brickwork*]

**Now**, Convert Cement Volume Into Bags.

The formula is,

= **Volume of the required cement ÷ Volume of one bag cement**.

= 0.92 ÷ 1.25 (*1 bag cement = 1.25 cubic feet*)

= 0.74 bag.

## How To Calculate Required Sand Quantity For 3” Brickwork?

The formula for calculating sand quantity is,

= **(Dry volume of mortar ÷ Sum of ratio) × Sand ratio**

= (4.60 ÷ 5) × 4

= **3.68 cubic feet**.

**Summary:**

So, the required materials for **100 **square feet **3”** thick brickwork are:

- Bricks = 286 nos

- Cement = 0.74 bags

- Sand = 3.68 cubic feet

Adding 5% wastage:

- Bricks = 300 nos

- Cement = 1 bag

- Sand = 4 cubic feet (
*Practically, for 1 bag of cement, the required sand is 5 cubic feet.*)

[*Note:**Round figure is taken*]

## A Quick Tip For Calculating Materials For 3” Brickwork

Now I’ll show you a quick tip. Applying this, you can calculate the required materials for any quantity of 3” brickwork.

As we know, for **100 **square feet of brickwork, the required materials are:

- Bricks = 300 nos

- Cement = 1 bag

- Sand = 5 cubic feet

So, for **one square feet** brickwork:

- Bricks = 300 ÷ 100 =
**3 Nos**

- Cement = 1 ÷ 100 =
**0.01 Bag**

- Sand = 5 ÷ 100 =
**0.05 Cubic feet**

Now, let’s say, you need to calculate materials for **500 **square feet of brickwork.

For that:

- Bricks = 3 nos × 500 = 1500 nos

- Cement = 0.01 bags × 500 = 5 bags

- Sand = 0.05 cubic feet × 500 = 25 cubic feet

So, the quick formula is,

**Required materials for 3” brickwork =** **Required material per square feet × Quantity of brickwork**

That’s it.

*You May Also Want To Learn:*

Jahan Uddin Ahmedvery good, very easiest tricks to learn the calculation process

Liton BiswasThank you, Jahan.