Brick Quantity
Free Brick Quantity calculator with clear step-by-step results.
About Brick Quantity
Brickwork is ordered by count, and the count comes from the repeating module: the brick plus one mortar joint in each direction. A standard 215 × 65 mm brick on a 10 mm bed gives 225 × 75 mm, which is 0.0169 m² and works out at the familiar 60 bricks per square metre of single-skin wall. Multiply by the number of skins for a cavity or solid wall, then add 5% because bricks arrive chipped and every closer is a cut.
Formulas
Bricks per square metre
Bricks/m² = 1 ÷ ((brick length + joint) × (brick height + joint))
Order quantity
Bricks to order = ceil(wall area × bricks/m² × skins × 1.05)
Worked example
With the default values below, Brick Quantity returns Bricks to Order of 1,246. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Wall areaminimum 0 m²
- 20 m²
- Brick lengthminimum 1 mm
- 215 mm
- Brick heightminimum 1 mm
- 65 mm
- Mortar jointaccepts 0–25 mm
- 10 mm
- Number of skins (brick leaves)accepts 1–4
- 1
Results
- Bricks to Order
- 1,246 bricks
- Bricks Laid
- 1,186 bricks
- Bricks per m² per Skin
- 59.3
- Mortar Required
- 440 L
Step by step
- 1Values used
- 2Bricks per square metre
- 3Order quantity
- 4Bricks to Order= 1,246 bricks
- 5Bricks Laid= 1,186 bricks
- 6Bricks per m² per Skin= 59.3
- 7Mortar Required= 440 L
Assumptions and limits
- The result is derived only from the 5 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
- A material take-off is not a structural design. Wall construction, ties, movement joints and support over openings must be specified by a qualified professional and comply with your local building code.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
A material take-off is not a structural design. Wall construction, ties, movement joints and support over openings must be specified by a qualified professional and comply with your local building code.
Frequently Asked Questions
Why is the answer close to 60 bricks per square metre?
That is the arithmetic of the standard metric brick module. 1 ÷ (0.225 × 0.075) = 59.3, which the trade rounds to 60 per m² of half-brick (single-skin) wall.
How do I handle a cavity wall?
Set the number of skins to 2. A cavity wall has an outer and an inner leaf, so it needs roughly 120 bricks per square metre if both leaves are brick.
Is the mortar figure reliable?
It is a planning figure of about 22 litres of mixed mortar per square metre per skin. Actual use depends on joint thickness, brick frog and how much is wasted on the board.