Brick Calculator

How it works

1. 1Enter your wall length and height in metres or feet using the Metric / Imperial toggle.
2. 2Select the brick size — each option includes a 10 mm mortar joint in its face area.
3. 3Set a waste percentage (5–10% is typical) and the calculator rounds up to the nearest whole brick.

Use cases

• Estimating materials before ordering bricks for a garden wall or boundary fence.
• Comparing how brick size affects total brick count and cost on a building project.
• Quick quantity take-off for a small extension or outbuilding wall.

Frequently asked questions

How many bricks are needed per square metre?

It depends on brick size and joint thickness. A UK standard brick (215 × 65 mm face) with a 10 mm joint covers about 0.0169 m², giving roughly 60 bricks per m². A Modular US brick gives about 67 per m², and a Jumbo about 33 per m².

Why should I add a waste percentage?

Bricks are cut at corners, openings, and edges, and some break during delivery or laying. Adding 5–10% covers these losses. For complex designs with many cuts, use 10–15%.

Does the calculator account for the mortar joint?

Yes — each brick size already includes a standard 10 mm mortar joint in its face area. The UK standard option uses (215 + 10) × (65 + 10) mm = 0.016875 m² per brick.