Use this brick calculator in feet to calculate bricks required for wall construction. It helps estimate bricks, cement, sand, and mortar required for 100 sq.ft. Walls with wastage allowance.
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Standard Brick: 230×115×75 mm (9×4.5×3 in)
Bricks per m³: 500-550 with mortar
Mortar per m³: 0.25-0.3 m³ for brickwork
Mortar Ratio: 1:4 cement:sand for walls
Brick Wastage: 3-8% for cutting & breakage
Dry Volume: Wet mortar × 1.33 (33% extra for shrinkage)
Number of Bricks:
Volume ÷ (Brick Volume + Mortar Volume)
Brick Volume:
Length × Width × Height
Mortar Volume:
Total Volume - (Bricks × Brick Volume)
Dry Mortar Volume:
Wet Mortar Volume × 1.33 (for shrinkage)
Cement Required:
(Dry Mortar Volume × Cement Ratio × 1440) ÷ 50
Sand Required:
Dry Mortar Volume × Sand Ratio
Standard Brick:
• 230×115×75 mm (9×4.5×3 in)
• Weight: 3-3.5 kg
Modular Brick:
• 190×90×90 mm (7.5×3.5×3.5 in)
• Weight: 2.5-3 kg
Engineering Brick:
• 200×100×100 mm (8×4×4 in)
• Weight: 3.5-4 kg
Jumbo Brick:
• 250×125×100 mm (10×5×4 in)
• Weight: 4-4.5 kg
1:3 Ratio:
• Rich mortar for high strength
• 1 bag cement : 3 ft³ sand
1:4 Ratio:
• Standard for brickwork
• 1 bag cement : 4 ft³ sand
1:5 Ratio:
• Lean mortar for foundations
• 1 bag cement : 5 ft³ sand
Dry Volume Note:
• Dry mortar = Wet mortar × 1.33
• Accounts for 25% shrinkage
• Always use dry volume for material calculations
Scenario: 20×10 ft wall, 9 inch thick
Wall volume: 20 × 10 × (9/12) = 150 ft³
Brick volume: (9×4.5×3)/1728 = 0.0703 ft³
Bricks needed: 150 ÷ 0.0703 = 2134 bricks
Wet mortar: 150 × 0.25 = 37.5 ft³
Dry mortar: 37.5 × 1.33 = 49.9 ft³
Cement (1:4): (49.9/5) ÷ 1.25 = 7.98 bags
Sand (1:4): (49.9/5) × 4 = 39.9 ft³
Scenario: 30×1.5×2 ft foundation
Volume: 30 × 1.5 × 2 = 90 ft³
Bricks per ft³: 13.5 (with mortar)
Bricks needed: 90 × 13.5 = 1215 bricks
Wet mortar: 90 × 0.3 = 27 ft³
Dry mortar: 27 × 1.33 = 35.9 ft³
Cement (1:5): (35.9/6) ÷ 1.25 = 4.78 bags
Sand (1:5): (35.9/6) × 5 = 29.9 ft³
Scenario: 12×12×10 in column (4 columns)
Volume per column: 1×1×10 = 10 ft³
Total volume: 10 × 4 = 40 ft³
Bricks needed: 40 × 13.5 = 540 bricks
Wet mortar: 40 × 0.28 = 11.2 ft³
Dry mortar: 11.2 × 1.33 = 14.9 ft³
Cement (1:4): (14.9/5) ÷ 1.25 = 2.38 bags
Sand (1:4): (14.9/5) × 4 = 11.9 ft³