📊 How many pieces per m² (by type, 10 mm joint)
Reference for a half-brick (single-leaf) wall with a 10 mm mortar joint:
| Piece |
Size (cm) |
Pieces/m² |
| Standard brick 24×11.5×7.1 | 24×11.5×7.1 | ~49 |
| Modular brick 19×9×9 | 19×9×9 | ~50 |
| Common brick 29×14×7.1 | 29×14×7.1 | ~41 |
| Hollow brick 33×16×11 | 33×16×11 | ~17 |
| Concrete block 39×19×19 | 39×19×19 | ~12.5 |
📐 Formula
Pieces = area ÷ ((length+joint) × (height+joint)). Mortar = wall volume − pieces volume; dry mortar = wet × 1.30. Cement and sand are split from the dry mortar by the mix ratio 1:n; cement bags = cement kg ÷ bag size.
🌍 Naming around the world
Brick = ladrillo = Ziegel / Mauerstein · Block = bloque = (Hohl)block · Mortar = mortero / pega = Mörtel · Joint = junta = Fuge · Stretcher (half-brick wall) = soga / media asta = Läuferverband.
❓ Frequently Asked Questions
How many bricks are there per m²?
It depends on the piece size. A standard 24×7.1 cm brick face with a 10 mm joint gives about 49 pieces per m² in a half-brick wall; a modular 19×9 cm brick gives 50/m²; a 39×19 cm concrete block gives about 12.5/m².
How much mortar, cement and sand do I need?
The mortar fills the joints and the wall thickness. We compute it as the gross wall volume minus the net volume of the pieces, then add a 30% dry factor and split it into cement and sand by the mix ratio (e.g. 1:4). A half-brick wall in standard brick uses roughly 0.02–0.03 m³ of mortar per m².
What is a half-brick wall vs a full-brick wall?
A half-brick (stretcher) wall is one piece wide — its thickness equals the brick width. A full-brick wall is two pieces wide, so it is thicker and load-bearing, and needs about twice the bricks and mortar.