Brick Calculator

Estimate how many bricks a wall needs from its length, height and thickness, allowing for mortar joints and wastage.

Enter your numbers

Wall length (feet)

Example: 10

Wall height (feet)

Example: 10

Wall thickness (inch)

Example: 5

Mortar joint (inch)

Example: 0.4

Wastage percent

Example: 5

Result

Currency

Figures are computed on your device; nothing is sent anywhere.

Formula

effectiveBrick = (9.5 + mortarJoint) * (4.5 + mortarJoint) * (2.75 + mortarJoint); wallVolume = wallLength * 12 * wallHeight * 12 * wallThickness; bricks = Math.ceil(wallVolume / effectiveBrick); bricksWithWastage = Math.ceil(bricks * (1 + wastage / 100))

How the calculation works

The calculator builds the volume of the wall from its length, height and thickness, all measured in feet and inches.

It then divides that volume by the space one brick occupies once a mortar joint is added around it.

A wastage allowance is applied at the end so broken or cut bricks do not leave the wall short.

Common mistakes

Ignoring the mortar joint, which makes each brick occupy more space and reduces the true brick count.
Forgetting wastage, since bricks break during transport and cutting and a wall ordered to the exact figure often runs short.

When to use it

Masons and homeowners use it to order the right number of bricks before starting a wall.
It also helps compare the cost of a thin partition wall against a full brick wall.

Worked example

For a wall 10 feet long, 10 feet high and 5 inches thick with a 0.4 inch mortar joint, the wall volume is 72000 cubic inches, you need 472 bricks and 496 bricks with 5 percent wastage.

Wall volume (m³) 1.18

Bricks needed 124.00

Bricks with wastage 131.00

Common questions

What is the standard brick size in Bangladesh?

The common brick in Bangladesh is about 9.5 inches long, 4.5 inches wide and 2.75 inches high, and a mortar joint of roughly 0.4 inch is added around it.

Last updated: 2026-10-03