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How to Estimate Brick Quantity for Any Project
The universal clay brick estimation formula, with worked examples.
5 min read
·The universal formula
Clay brick quantity = (wall area in m²) × (bricks per m² for your wall thickness) × (1 + wastage %)
- •Single-leaf wall in our standard brick: ~64 bricks per m²
- •Double-leaf wall: ~128 bricks per m²
- •Triple-leaf wall (piers / columns): ~192 bricks per m²
- •Wastage allowance: 5% for simple layouts, 7–8% for patterns / decorative work
Example 1: Simple room
A 4m × 3m room with 3m-high double-leaf external walls, one door (0.9m × 2.1m), two windows (1.2m × 1.2m each):
- •Wall perimeter: 14m
- •Wall area: 14m × 3m = 42 m²
- •Subtract openings: 0.9×2.1 + 2×(1.2×1.2) = 1.89 + 2.88 = 4.77 m²
- •Net wall area: 42 − 4.77 = 37.23 m²
- •Bricks: 37.23 × 128 = 4,765 bricks
- •Add 5% wastage: 4,765 × 1.05 = 5,003 bricks → round to 5,000
Example 2: Boundary wall
60m × 1.8m-high single-leaf wall:
- •60 × 1.8 = 108 m²
- •108 × 64 = 6,912 bricks
- •Piers (one every 4m, 15 piers × ~50 extra bricks each): +750 bricks
- •Cap course: +350 bricks
- •Total: 8,012 bricks, add 5% = 8,413 → round to 8,500
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