Brick Calculation Formula
Total Bricks: Wall Area × 48 bricks per m²
Total Bricks (with wastage): Wall Area × 52 bricks per m² (includes 5% waste)
Sand Required: Total Bricks ÷ 1000 m³
Cement Required: (Total Bricks ÷ 1000) × 10 bags
Mortar Volume: Wall Area × (Mortar Thickness ÷ 1000) × 0.3 m³
Notes: Standard calculation uses 48 bricks per m² + 5% wastage = 52 total
Material Ratios: 1m³ sand per 1000 bricks, 10 bags cement per 1000 bricks
Brick Dimensions: Can be adjusted for custom brick sizes with mortar gaps
Related Resources
Brick Calculator Australia — How Many Bricks Do You Need?
Calculate the number of bricks required for walls, fences, and features. Accounts for standard Australian brick sizes including common (230x110x76mm) and modular formats.
Standard Australian Brick Sizes
| Type | Size (L x W x H) | Bricks per m² |
|---|---|---|
| Standard | 230 x 110 x 76mm | ~50 |
| Modular | 290 x 90 x 90mm | ~33 |
| Double Height | 230 x 110 x 162mm | ~28 |
Frequently Asked Questions
How many bricks do I need per square metre?
For standard Australian bricks (230x110x76mm) with 10mm mortar joints, you need approximately 50 bricks per square metre for a single-skin wall. For a double-brick cavity wall, double that to 100 per m².
How do I calculate bricks for a wall?
Multiply the wall area (length x height in metres) by 50 for single brick, or 100 for double brick. Add 5-10% for cuts and waste. Example: a 6m x 2.4m wall = 14.4m² x 50 = 720 bricks + 10% waste = 792 bricks.
How much mortar do I need per 1000 bricks?
For standard bricks with 10mm joints, you need approximately 0.5 cubic metres of mortar per 1000 bricks. That’s roughly 7-8 bags of pre-mixed mortar (20kg bags).
Need more than a calculator?
Built Simple does estimating, scheduling, time tracking, and team management — all in one app.