Brick Count
Brick dimensions plus a 10 mm mortar joint give the area one brick occupies. Divide the wall area by that and add 5% for breakage and cuts.
Your numbers
Bricks needed
1,129
Count
1,075
Area
14.4m²
Formula
Bricks needed = Length × Width × 10000 ÷ ((Brick length (cm) + 1) × (Brick height (cm) + 1))
A standard brick is 190 × 57 × 90 mm. A double-skin wall doubles the count, so settle the wall thickness first.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| Length (m)The measurement across, side to side. | 6 | 0 and up |
| Width (m)The measurement front to back. | 2.4 | 0 and up |
| Brick length (cm) (cm)The long side of one brick. | 19 | 1 and up |
| Brick height (cm) (cm)The height of one brick. | 5.7 | 1 and up |
Step by step
Quick reference table
Results when only Length (m) changes and everything else stays put.
| Length (m) | Bricks needed | Count | Area (m²) |
|---|---|---|---|
| 3 | 565 | 538 | 7.2 |
| 4.5 | 847 | 806 | 10.8 |
| 6 | 1,129 | 1,075 | 14.4 |
| 9 | 1,693 | 1,612 | 21.6 |
| 12 | 2,257 | 2,150 | 28.8 |
What each result means
| Result | At default values |
|---|---|
| Bricks neededBricks needed with mortar joints and waste counted. | 1,129 |
| CountA plain count of items; it often ends up as the denominator. | 1,075 |
| Area (m²)The space a shape covers — length squared. | 14.4 |
Common mistakes
A standard brick is 190 × 57 × 90 mm. A double-skin wall doubles the count, so settle the wall thickness first.
Glossary
- Length
- The measurement across, side to side.
- Width
- The measurement front to back.
- Brick length (cm)
- The long side of one brick.
- Brick height (cm)
- The height of one brick.
- Bricks needed
- Bricks needed with mortar joints and waste counted.
- Count
- A plain count of items; it often ends up as the denominator.
- Area
- The space a shape covers — length squared.
Frequently asked questions
Q. How is Brick Count calculated?
Bricks needed = Length × Width × 10000 ÷ ((Brick length (cm) + 1) × (Brick height (cm) + 1)) — Brick dimensions plus a 10 mm mortar joint give the area one brick occupies. Divide the wall area by that and add 5% for breakage and cuts.
Q. Can you walk through an example?
With Length 6m, Width 2.4m, Brick length (cm) 19cm, Brick height (cm) 5.7cm, the answer is Bricks needed 1,129.
Q. What do I need to enter?
Enter Length, Width, Brick length (cm), Brick height (cm). The result recalculates as you type, and an empty box counts as zero.
Q. How much does the answer move if I change a number?
Changing only Length (m) moves the answer to Length (m) 3 → Bricks needed 565 and Length (m) 12 → Bricks needed 2,257. The table below lays out five steps.
Q. How are the numbers rounded?
Money is shown to the nearest whole unit, percentages to one decimal place and everything else to two. What you see is rounded; the calculation itself carries the unrounded value forward.
Q. Anything to watch out for?
A standard brick is 190 × 57 × 90 mm. A double-skin wall doubles the count, so settle the wall thickness first.
Related calculators
Keep your length units consistent across inputs — mixing centimetres and metres throws results far off.