Estimate how many bricks you need for a wall, including mortar joints, waste allowance and approximate material quantities. Enter your wall dimensions and brick size to get a quick brick quantity estimate.
Calculate Bricks Needed
How the Brick Calculator Works
Brick quantity depends mainly on wall area, brick dimensions and the mortar joint between bricks. Larger bricks cover more wall area, while thicker mortar joints reduce the number of bricks needed per square meter.
The calculator first converts the wall dimensions and brick dimensions into meters. It then estimates the effective brick module by adding the mortar joint to the relevant brick dimensions.
Basic Wall Area
Wall area is calculated by multiplying wall length by wall height. Door and window openings are then subtracted.
Net Wall Area = Wall Length × Wall Height − Opening Area
Brick Module Area
The effective brick face includes the mortar joint. This gives a more practical estimate than calculating the brick face alone.
Effective Brick Area = (Brick Length + Mortar Joint) × (Brick Height + Mortar Joint)
Estimated Brick Quantity
The net wall area is divided by the effective brick module area. The selected waste allowance is then added.
Bricks = Net Wall Area ÷ Effective Brick Area
Common Brick Sizes
| Brick Type | Approximate Size | Common Use |
|---|---|---|
| Standard Metric Brick | 215 × 102.5 × 65 mm | General masonry |
| Modular Brick | 190 × 90 × 90 mm | General construction |
| Engineering Brick | 215 × 102.5 × 65 mm | High-strength masonry |
| Large Format Brick | Varies by manufacturer | Faster wall coverage |
Brick dimensions vary between countries and manufacturers. Always use the actual dimensions of the bricks being purchased for a project.
How Many Bricks Per Square Meter?
A common brick measuring approximately 215 × 65 mm with a 10 mm mortar joint requires roughly 60 to 65 bricks per square meter for a typical single-brick wall face. The exact quantity depends on the brick dimensions and joint size.
The calculator uses the actual dimensions entered instead of relying on a fixed bricks-per-square-meter assumption.
Why Mortar Joint Thickness Matters
Mortar occupies part of the wall surface. A 10 mm joint is common in many masonry applications, but actual joint requirements depend on the brick type, construction system and local practice.
Increasing the mortar joint increases the effective brick module and therefore reduces the estimated number of bricks required for the same wall area.
How Much Brick Waste Should You Allow?
Brick waste accounts for cutting, breakage, damaged units and handling. A 5% allowance is a useful starting estimate for straightforward layouts. More complex walls with many corners, openings or patterns often require a larger allowance.
- 0%: theoretical quantity only.
- 5%: common planning allowance for straightforward work.
- 10%: useful where cuts and breakage are more likely.
- 15% to 20%: useful for complex layouts or higher expected waste.
Brick Calculator FAQs
This calculator is intended for estimating and planning material quantities. Masonry design, structural requirements, wall ties, mortar specifications and local building requirements should be checked against applicable standards and professional guidance.