Calculating brick quantity accurately prevents both shortage and excess purchasing. This guide provides formulas and quick-reference tables for common room sizes.
The Calculation Formula
- Total wall area = Room perimeter x Height
- Subtract openings = Doors + Windows area
- Net wall area = Total area - Openings
- Brick count = Net area x Bricks per sq ft
Bricks Per Square Foot
| Wall Thickness | Bricks/Sq Ft |
|---|---|
| 9 inch (one brick) | 13.5 |
| 4.5 inch (half brick) | 7 |
Based on standard brick size (9" x 4.5" x 3") with 10mm mortar joints.
Quick Reference by Room Size
| Room Size | All 9" Walls | Mixed (9" + 4.5") |
|---|---|---|
| 10x10 ft | ~4,900 | ~3,800 |
| 10x12 ft | ~5,500 | ~4,200 |
| 12x12 ft | ~5,900 | ~4,500 |
| 12x15 ft | ~6,600 | ~5,100 |
| 15x15 ft | ~7,800 | ~6,000 |
All figures assume 10 ft height, standard door and window openings, and 5% wastage. Use the Brick Calculator for precise figures.
Worked Example: 10x10 Ft Room
- Perimeter: 40 ft, Height: 10 ft
- Total wall area: 400 sq ft
- Openings (1 door + 1 window): 36 sq ft
- Net area: 364 sq ft
- With mixed walls (2 external at 9", 2 internal at 4.5"): approximately 3,800 bricks
Brick Cost (2026 Rates)
| Type | Rate/Piece | Per 1000 |
|---|---|---|
| Red Brick | ₹7–₹12 | ₹7,000–₹12,000 |
| Fly Ash Brick | ₹5–₹8 | ₹5,000–₹8,000 |
| AAC Block | ₹40–₹55 | ₹40,000–₹55,000 |
Fly ash bricks are 20–30% cheaper with more uniform sizing, meaning less mortar is needed.
Complete House Estimate
A 1000 sq ft (2BHK) house typically needs 8,000–12,000 bricks total, covering all rooms, kitchen, bathrooms, and boundary wall. At 2026 rates, brick cost alone is ₹56,000–₹1.4 lakh depending on brick type.
Mortar Materials Per 1000 Bricks
| Material | 9-inch Wall | 4.5-inch Wall |
|---|---|---|
| Cement (bags) | 2.5–3 | 1.2–1.5 |
| Sand (cu ft) | 9–11 | 4.5–5.5 |
Use the Cement Calculator alongside the Brick Calculator to plan your complete material list accurately.
Construction Management Expert
Senior Construction Consultant at Yojo
10+ years of experience
Reviewed on 11 April 2026
About Yojo Team
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