Brick Calculator
This brick calculator works out how many bricks you need for a wall. Enter the wall size and a waste allowance, and the brick calculator gives the brick quantity, bricks per m2, and the mortar to go with it. It is a fast brick calculator for a wall of any size.
Results
The Brick Calculator is part of our Materials Estimating collection. Browse more materials estimating to size, convert, and check your work alongside this tool.
What the brick calculator does
The brick calculator turns a wall's dimensions into a brick quantity, with mortar joints and waste built in. Order bricks by eye and you either run short mid-job or end up with a spare pallet, so this brick calculator for a wall counts them properly. It also reports bricks per m2, the figure the brickwork calculation for a wall depends on.
Brickwork calculation formula
The brick calculator divides the wall area by the space one brick takes up including its mortar joint. A standard brick face is 215 by 65 mm, and with a 10 mm joint each brick claims 225 by 75 mm:
That bricks calculation formula gives about 60 bricks per m2 for a single-thickness wall, which is why the brick calculator reports bricks per sq meter alongside the total.
Brick calculator example
A wall 10 m long and 3 m high, with 5 percent waste, runs the brickwork calculation for the wall:
At roughly 60 bricks per m2, that matches the brick calculator quantity for a wall this size.
How to use the brick calculator
Enter the wall length and height in meters and a waste percentage. Five percent covers normal breakage; go higher for a wall with many openings. The brick calculator returns the number of bricks to order. Behind the result is a standard brickwork calculation for the wall using the brick face plus its mortar joint.
Reading the brick calculator result
This brick calculator counts a single-thickness wall, the common garden and partition build. A double-thickness wall needs roughly twice the bricks. Order the full brick quantity including waste, and keep a few spares back for repairs so you are not hunting a matching batch years later. The bricks per m2 figure lets you scale the brickwork calculation to any wall fast.
When to use the brick calculator
- Working out how many bricks you need for a wall
- Getting bricks per m2 for a brickwork calculation
- Estimating a brick and mortar order together
- Budgeting a build with a brickwork quantity calculator
Common brick calculation mistakes
- Forgetting the mortar joint. Bricks claim more space than their bare size; the brick calculator counts the joint.
- Missing the wall thickness. A double wall needs about 120 bricks per m2, not 60.
- Ordering zero spares. Keep extra from the same batch for future repairs and colour matching.
Tips for accurate brick results
- Around 60 bricks per m2 is a fast single-wall check against the brick calculator.
- Add more waste for walls with lots of cuts and openings.
- Order brick and mortar together from the same brickwork calculation.
Why the brick calculator builds in the mortar joint
The mortar joint is what separates a real brick calculation from a rough guess. A brick measures 215 by 65 mm on its face, but you never lay bricks touching. The 10 mm bed of mortar around them means each brick occupies a 225 by 75 mm slot, and that difference, multiplied across a wall, changes the brick quantity noticeably. The brick calculator bakes the joint into the bricks calculation formula, which is why its bricks per m2 figure matches what you order rather than a bare face count.
Single versus double wall in the brickwork calculation
Wall thickness is the other decision that doubles or halves a brick order. A half-brick wall, one brick thick, is what most garden walls and internal partitions use, and it drives the standard 60 bricks per m2 the brick calculator assumes. A one-brick wall, bonded front to back for strength, needs about 120 bricks per m2 and a wider footing to carry the weight. Before you trust any brick calculator for a wall, be clear which you are building, because the two look alike on a plan yet differ by a full pallet on a decent brickwork calculation.
Reference Table
| Wall type | Bricks per m2 |
|---|---|
| Half-brick (single) | ~60 |
| One-brick (double) | ~120 |
Brick Calculator FAQ
How many bricks do I need for a wall?
Multiply the wall area by about 60 bricks per m2 for a single-thickness wall, then add waste. The brick calculator for a wall does this brickwork calculation and gives the exact brick quantity.
How many bricks are in a square meter?
About 60 bricks per m2 for a standard single wall once the mortar joints are counted, or roughly 120 per m2 for a double wall. The brick calculator reports bricks per sq meter with the total.
What is the bricks calculation formula?
Divide the wall area by the brick face plus its mortar joint (0.225 × 0.075 m), then add waste. That is the bricks calculation formula the brick calculator uses for the brickwork calculation for a wall.
Should I add extra for waste?
Yes. Add 5 to 10 percent to the brick quantity for breakage and cuts, more for walls with many openings. Keep a few spares from the same batch for repairs.