How much mortar do I need?

Roughly 25–30 kg dry mortar mix per m² of single-brick wall — use a dedicated mortar calculator for large jobs.

Does orientation matter?

Enter the face dimensions you see on the wall (length × height per brick), not the stretcher depth into the wall.

Brick count for a wall with mortar joints.

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bricks = ceil(wall area ÷ ((L + joint) × (H + joint)) × (1 + waste%))

Wall area divided by the effective face area of one brick including mortar joints (converted to metres), plus waste for breakage and cuts.

A 5 m × 2.4 m wall (12 m²) with standard 19×9 cm bricks and 10 mm joints needs roughly 570 bricks before 5% waste — about 598 to order.

Openings (doors, windows) must be subtracted from wall area manually.
Single vs double wythe walls double the count — this is one face only.
Metric modular bricks differ from imperial sizes — enter actual brick dimensions.

: Roughly 25–30 kg dry mortar mix per m² of single-brick wall — use a dedicated mortar calculator for large jobs.