Brick calculator

Estimate bricks for a wall face using nominal brick-plus-joint modules, then apply your waste allowance.

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Wall width

Wall height

More inputs and assumptions

Brick length

Brick height

Joint width

Waste allowance (%)

Answer

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Estimate bricks for a wall face using nominal brick-plus-joint modules, then apply your waste allowance.

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Saved scenario

Save the current answer, then change an input to compare. This clears when you leave.

Formula and assumptions

All dimensions use one unit. Module area = (brick length + joint) × (brick height + joint). This is an area estimate, not an exact bond or cut layout. Subtract openings by calculating separate rectangular sections; cavity walls need each leaf counted.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-26

Using Brick calculator

Estimate bricks for a wall face using nominal brick-plus-joint modules, then apply your waste allowance.

Next: Block mortar calculator

A worked example

Example inputs: wall width = 10, wall height = 2, brick length = 0.2, brick height = 0.06, joint width = 0.01, waste allowance (%) = 10. Bricks before waste = 1361.

Before you use the result

Example results for wall width

These examples use Wall height: 2; Brick length: 0.2; Brick height: 0.06; Joint width: 0.01; Waste allowance (%): 10. They are reference calculations, not recommended settings.

Wall width	Bricks before waste
5	681
10	1361
20	2722

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