Brick Calculator South Africa - How Many Bricks Do I Need?
Use this free brick calculator to work out how many bricks you need for your building project. Supports standard, maxi, and stock bricks used in South Africa. Calculates the number of bricks, mortar (cement and sand), and gives you a cost estimate. Add multiple walls and account for doors and windows.
Wall Dimensions
Quick Reference: Common Structures
Standard brick, half-brick wall, 10% wastage, no openings. For full-brick walls, double the brick count.
| Structure | Wall Area | Bricks (half) | Cement Bags |
|---|---|---|---|
| Single garage (3m x 6m) | 43.2 m² | 2 376 | 11 |
| Double garage (6m x 6m) | 57.6 m² | 3 168 | 15 |
| Bedroom (4m x 4m) | 38.4 m² | 2 112 | 10 |
| Bathroom (2.5m x 2.5m) | 24.0 m² | 1 320 | 6 |
| Boundary wall (20m long) | 36.0 m² | 1 981 | 9 |
| Boundary wall (40m long) | 72.0 m² | 3 961 | 18 |
* These are estimates for standard bricks (222 x 106 x 73mm) with 10mm mortar joints. Actual quantities may vary. Perimeter walls (e.g., garage, bedroom) use total perimeter as length.
Brick Sizes in South Africa
South Africa uses several standard brick sizes. The most common are:
| Brick Type | Dimensions (L x W x H) | Bricks/m² (half) | Bricks/m² (full) |
|---|---|---|---|
| Standard | 222 x 106 x 73mm | 50 | 100 |
| Maxi | 290 x 140 x 90mm | 28 | 56 |
| Stock | 222 x 106 x 73mm | 50 | 100 |
The standard brick (also known as an imperial brick) is the most widely used brick in South Africa at 222mm x 106mm x 73mm. Maxi bricks are larger (290mm x 140mm x 90mm), which means fewer bricks per square metre and faster laying, but each brick costs more. Stock bricks are the same size as standard bricks and are the most affordable option for building walls that will be plastered.
How to Order Bricks
When ordering bricks, keep these tips in mind:
- Always add wastage: Add 5–10% extra to your calculated quantity to account for breakage, cutting, and transport damage. For DIY projects, add 15%.
- Order in bulk: Bricks are cheaper when ordered by the thousand or by the pallet. A standard pallet holds approximately 500 stock bricks.
- Check delivery costs: Delivery is usually charged separately and depends on the distance from the brickyard. Some suppliers offer free delivery above a minimum order.
- Order from one batch: Bricks from different batches may have slight colour variations. For face brick walls, order all bricks from the same production batch.
- Store properly: Stack bricks on a level surface and cover them to protect from rain. Wet bricks are harder to lay and affect mortar adhesion.
Mortar Mix Ratios
The standard mortar mix for brickwork in South Africa is 1:6 (1 part cement to 6 parts building sand) by volume. This produces a Class II mortar suitable for most residential construction. For load-bearing walls or walls exposed to severe weather, use a stronger 1:4 mix.
A standard 10mm mortar joint is used between bricks. This calculator uses 10mm joints for all calculations. Thicker joints will increase mortar consumption but reduce the number of bricks needed per square metre.
Frequently Asked Questions
How many bricks per square metre in South Africa?
For a standard South African brick (222mm x 106mm x 73mm) with a 10mm mortar joint, you need approximately 50 bricks per square metre for a half-brick (single skin) wall and 100 bricks per square metre for a full-brick (double skin) wall. For maxi bricks (290mm x 140mm x 90mm), you need approximately 28 bricks per square metre for a half-brick wall and 56 per square metre for a full-brick wall.
How much do bricks cost in South Africa?
Standard bricks in South Africa typically cost between R2 and R4 each, depending on the supplier, region, and quantity ordered. Maxi bricks cost between R5 and R8 each. Face bricks (decorative bricks that do not need plastering) cost more, typically R6 to R15 each. Buying in bulk (per 1,000 or per pallet) usually gives a better price. Delivery costs vary based on distance and are often charged separately.
How much wastage should I allow for bricks?
The standard wastage allowance for bricks is 5-10%. Allow 5% if you have an experienced bricklayer doing the work. Allow 10% for standard building projects. For DIY projects or if you are a first-time builder, allow up to 15%. Wastage occurs from breakage during transport, cutting bricks to fit around corners and openings, and general handling damage.
What is the difference between a half-brick and full-brick wall?
A half-brick wall (single skin) is one brick thick - the wall thickness equals the width of the brick (approximately 106mm for a standard brick). A full-brick wall (double skin) is two bricks thick (approximately 222mm including mortar). Full-brick walls are stronger and provide better insulation and soundproofing but use twice as many bricks. External walls of houses are typically full-brick, while internal partition walls and boundary walls are often half-brick.
How do I calculate mortar for brickwork?
For a standard mortar mix ratio of 1:6 (1 part cement to 6 parts building sand), you need approximately 0.25 bags of 50kg cement per square metre of half-brick wall, or 0.50 bags per square metre of full-brick wall. For sand, allow approximately 0.012 cubic metres per square metre of half-brick wall, or 0.024 cubic metres for full-brick. These are approximate figures - actual consumption depends on the bricklayer, joint thickness, and brick absorption rate.
What is a stock brick vs a face brick?
A stock brick (also called a common brick) is a standard building brick that is not finished on the surface. Stock bricks are cheaper and are intended to be plastered over, so their surface finish does not matter. A face brick is a higher-quality brick with an attractive finished surface that is designed to be left exposed (unplastered). Face bricks come in various colours and textures and cost significantly more than stock bricks. Most residential construction in South Africa uses stock bricks with plaster and paint.
Disclaimer: This calculator provides estimates based on standard South African brick sizes and mortar mix ratios. Actual quantities may vary depending on brick quality, bricklayer skill, mortar joint thickness, and site conditions. Cost estimates are approximate and vary by region and supplier. Always get quotes from local suppliers for accurate pricing.
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