How many bricks per sq ft – 9 inch and 4.5 inch wall
Number of bricks, cement bags and sand for brick masonry in cement mortar 1:6, for standard modular and traditional Indian bricks.
1 cum = 35.31 cft
Bricks per cum, cft and sq ft of wall
| Brick size (mm) | per cum | per cft | 9 inch wall, per sq ft | 4.5 inch wall, per sq ft |
|---|---|---|---|---|
| Modular 190×90×90 (with 10 mm joints) | 500 | ≈ 14 | ≈ 10.5–11 | ≈ 5–5.5 |
| Traditional 230×115×75 (with 10 mm joints) | ≈ 390 | ≈ 11 | ≈ 8.5 | ≈ 4–4.5 |
Cement and sand for brickwork (mortar 1:6)
About 0.30 cum of dry mortar per cum of brickwork → ≈ 1.25 bags of cement (50 kg) and ≈ 9 cft of sand per cum of brickwork. For 1:4 mortar: ≈ 1.75 bags of cement per cum.
Example: 9 inch wall, 20 ft long, 10 ft high
20 × 10 × 0.75 ft = 150 cft = 4.25 cum → bricks 4.25 × 500 = 2,125, with 5% ≈ 2,230 modular bricks; cement ≈ 5.3 bags; sand ≈ 39 cft. Deduct openings (doors, windows) larger than about 0.1 sq m.
Calculate for your own measurements with AI Onin – freeAI Onin is a free AI assistant for construction: material quantities, BOQ, cost estimates and site photo analysis. Values are approximate (India, 2026); always follow your structural drawings, IS codes and the manufacturer's data. Structural design must be checked by a licensed structural engineer.