Brick Calculator South Africa
How many bricks, cement bags and sand do you need? Enter your wall dimensions — doors and windows subtracted automatically.
Wall dimensions
1.9 × 0.9 m each
1.2 × 1.0 m each
10% is standard
Materials needed
Net wall area
19.9 m²
after openings
Bricks
1 138
incl. wastage
Cement (50 kg)
3 bags
1:4 mortar mix
Sand (40 kg)
9 bags
builder's bags
How this is calculated
Based on SANS 227 standard brick (222 × 106 × 73 mm work size) with 10 mm mortar joints. Single skin: ~52 bricks/m². Mortar: 1:4 cement:sand mix. Doors subtracted at 1.71 m² each, windows at 1.20 m².
Common questions
How many bricks per square metre in South Africa?
For a standard single-skin (110 mm) wall using SANS 227 bricks (222 × 106 × 73 mm) with a 10 mm mortar joint, you need approximately 52 bricks per square metre of wall face. A double-skin (230 mm) wall requires about 104 bricks per m².
What size is a standard South African brick?
The SA standard (SANS 227) brick has a work size of 222 × 106 × 73 mm. With a 10 mm mortar joint on all sides, the coordinating (grid) size is 232 × 116 × 83 mm.
What cement:sand ratio should I use for brick mortar?
A 1:4 cement:sand mix (one 50 kg bag of OPC to four builder's bags of sand) is standard for load-bearing walls. For non-structural garden walls or partitions, 1:6 is acceptable and more economical.
Should I add a wastage allowance?
Yes — always add at least 10% wastage for cuts, breakages, and on-site variations. For complex walls with many corners or curved sections, use 15%. The calculator adds your chosen wastage percentage automatically.
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