Bricks per m² Calculator
How many bricks fit in one square metre or square foot of wall? Enter the size of your brick and the thickness of the mortar joint to get the exact count per m², per ft² and per cubic metre of brickwork, for single and double skin walls.
Bricks per square metre
Bricks per m² formula
Every brick in a wall “owns” its face plus half of the mortar joint around it, which works out the same as adding one full joint to the length and one to the height.
Per square metre (one skin)
Bricks/m² = 1 ÷ [(L + j) × (H + j)]With L, H and j in metres. Multiply by 2 for a double-skin (one-brick) wall.
Per cubic metre of brickwork
Bricks/m³ = 1 ÷ [(L + j) × (H + j) × (D + j)]Used for solid walls estimated by volume, such as a 9 in wall in Pakistan and India.
Mortar per square metre
Mortar = bricks/m² × [(L + j) × j + H × j] × DOne bed joint and one perp joint per brick, through the full brick depth. Add 15–25% for droppings on site.
Bricks per m² for common sizes
| Brick | Joint | Per m² | Per ft² | Per m³ |
|---|---|---|---|---|
| UK 215 × 102.5 × 65 mm | 10 mm | 59.3 | 5.51 | 527 |
| Euro 240 × 115 × 71 mm (NF) | 10 mm | 49.4 | 4.59 | 395 |
| 9 × 4½ × 3 in (228 × 114 × 76 mm) | 10 mm | 48.9 | 4.54 | 394 |
| Modular 190 × 90 × 90 mm | 10 mm | 50.0 | 4.65 | 500 |
| US modular 7⅝ × 3⅝ × 2¼ in | ⅜ in | 73.8 | 6.86 | — |
| US standard 8 × 3⅝ × 2¼ in | ⅜ in | 70.5 | 6.55 | — |
US modular brick is often quoted at 6.75 per ft² because it is laid to modular coursing (three courses per 8 in), which makes the effective joint slightly thicker than ⅜ in.
Worked example: UK brick with 10 mm joints
- Brick + joint = 0.225 m × 0.075 m = 0.016875 m²
- Bricks per m² = 1 ÷ 0.016875 = 59.26 (order 60)
- Double skin = 118.5 per m²
- Mortar = 59.26 × (0.225 × 0.01 + 0.065 × 0.01) × 0.1025 = 0.0176 m³ per m²
Frequently asked questions
How many bricks per square metre UK?
60 is the figure most builders use: 59.26 standard 215 × 65 mm bricks per m² with 10 mm joints, in a single skin.
How many bricks per cubic metre?
About 500–530 UK bricks or roughly 400 bricks of 9 × 4½ × 3 in per cubic metre of solid brickwork, including joints.
Does a thicker joint mean fewer bricks?
Yes. Each brick covers more area as the joint grows. A UK brick with 12 mm joints drops to about 57 per m².
Related calculators
Results are theoretical counts. Add 5–10% for breakage and cutting when ordering.