Number of bricks for a wall
The number of bricks per m² depends on the size and the joint: with a 1 cm mortar joint, a 22 × 10.5 × 5.5 cm brick actually lays a module of 23 × 6.5 cm, i.e. about 67 bricks per m². The calculator applies this reasoning to the size you choose and adds breakage.
| 📐 Wall area | |
| 🧱 Bricks per m² (chosen size) | |
| 🧱 Bricks to order (incl. margin) | |
| 🪣 Estimated laying mortar |
Mortar is estimated at about 30 litres per m² for a one-brick-thick wall (≈ 10.5 cm). For the cement / sand / water breakdown of this mortar, use the mortar mix calculator. Tie bricks, lintels and sills are counted separately.
Reference: bricks per m² by size
| Brick size | Module incl. 1 cm joint | Bricks per m² |
|---|---|---|
| 22 × 10.5 × 5.5 cm | 23 × 6.5 cm | ≈ 67 |
| 21 × 10 × 6.5 cm (facing) | 22 × 7.5 cm | ≈ 61 |
| 25 × 12 × 6.5 cm | 26 × 7.5 cm | ≈ 52 |
Two mistakes come up again and again: counting the brick without the joint (you overestimate the need by 10 to 15%), and forgetting that bricks are often ordered by the pallet — round up to a full pallet, as returns are rarely accepted. To compare with concrete blocks, see also the block calculator.