The number of bricks per m² depends on the brick format and the joint width. Here's how to work it out yourself instead of looking up a figure.
Introduction
Many people look for a single figure for 'bricks per m²', but it does not exist. The number depends on the brick's visible dimensions and on how wide the joints you lay with are. The only robust approach is to calculate it from the actual measurements.
The formula
The idea is that each brick in the surface occupies its own visible face plus one joint in each direction: the neighbours' half-joints add up to a whole one. The area per brick therefore becomes (L+joint)·(H+joint), and the number per m² is the reciprocal of that value.
Example
A Danish standard brick laid as a stretcher has a visible face of approx. 228 mm × 54 mm. With 12 mm joints: (0.228+0.012)·(0.054+0.012) = 0.240·0.066 = 0.01584 m² per brick, i.e. n = 1/0.01584 ≈ 63 bricks/m².
| Joint | Face area per brick | Pavers/m² |
|---|---|---|
| 10 mm | 0,238 · 0,064 = 0,01523 m² | ≈ 66 |
| 12 mm | 0,240 · 0,066 = 0,01584 m² | ≈ 63 |
| 15 mm | 0,243 · 0,069 = 0,01677 m² | ≈ 60 |
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