🧱 Brick Calculator
Calculate bricks, cement & sand for any wall — with cost estimate
Brick Calculator — Complete Guide
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A Brick Calculator is a free online tool that helps you estimate the exact number of bricks, cement bags, and sand required for building a wall. It also calculates the total material cost in Indian Rupees (₹).
- Total number of bricks needed
- Bags of cement required (50 kg per bag)
- Cubic feet of sand needed
- Total estimated material cost in ₹
- Wastage adjustment (5%–10% extra)
In India, the most commonly used brick size is the Modular Brick:
Nominal size: 9" × 4.5" × 3" (Length × Width × Height)
Actual size: 8.5" × 4" × 2.75" (with mortar joint: 0.5" all sides)
Other common sizes used in India:
- 9" × 4" × 3" — Old standard size (commonly used in many regions)
- 10" × 5" × 3" — Larger bricks used in some states
- 9" × 3" × 3" — Thin bricks for partition walls
- Custom size — Enter your own dimensions
The standard mortar joint thickness is 0.5 inch (12 mm) on all sides.
- 4.5 inch wall (Half Brick) — Partition walls, boundary walls, room dividers. Uses bricks laid flat (stretcher bond).
- 9 inch wall (Full Brick) — External walls, load-bearing walls, compound walls. Double the brick count of a 4.5" wall.
- 13.5 inch wall (1.5 Brick) — Very strong walls, basement walls, retaining walls.
The formula used in this calculator:
Step 2: Brick Volume = (brick L + mortar) × (brick H + mortar) × (brick W + mortar) in feet
Step 3: Number of Bricks = Wall Volume ÷ Brick Volume
Step 4: Add wastage (5%–15% extra)
Step 5: Mortar Volume = Wall Volume × 30% (approx mortar ratio)
Step 6: Cement bags and sand from mortar ratio (1:4, 1:5, 1:6)
Example: Wall 10ft × 10ft × 0.75ft (9 inch), Standard brick 9×4.5×3 inches
- Wall Volume = 10 × 10 × 0.75 = 75 cubic feet
- Brick Volume = (9.5×3.5×4.5) inches = 149.625 cubic inches = 0.0866 cubic feet
- Bricks needed = 75 ÷ 0.0866 = 866 bricks
- Add 10% wastage = 866 + 87 = 953 bricks
Brick prices vary by region, season, and quality. Approximate rates in India (2025):
- Red Clay Brick: ₹6 – ₹10 per brick (most common)
- Fly Ash Brick: ₹4 – ₹7 per brick (eco-friendly, lightweight)
- AAC Block (Aerocon): ₹35 – ₹60 per piece (large size)
- Wire Cut Brick: ₹8 – ₹14 per brick (machine-made, uniform)
Sand: ₹50 – ₹120 per cubic foot (varies by region)
Enter your local rates in the calculator for accurate cost estimation.
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Learn quantity estimation and material takeoff calculations practically.
| Item | Without Wastage | With Wastage |
|---|---|---|
| Calculate to see results | ||
- Brick count includes selected wastage percentage for breakage and cutting
- Cement and sand quantities are approximate based on mortar volume (30% of wall volume)
- Labour charges are NOT included in this estimate
- Prices vary by region — use your local market rates for accurate cost
How to Use This Brick Calculator
Step 1: Enter the wall length and height in feet. For example, a 10 ft × 10 ft wall.
Step 2: Select wall thickness — 4.5 inch (partition/half-brick), 9 inch (standard full-brick), or 13.5 inch (heavy wall).
Step 3: Select brick size. Standard Indian modular brick is 9×4.5×3 inches.
Step 4: Set mortar mix ratio and wastage percentage. 10% wastage is recommended for standard construction.
Step 5: Enter area of doors and windows to deduct from wall area (optional).
Step 6: Enter your local brick price, cement price per bag, and sand price per CFT.
Step 7: Click "Calculate Now" to get the complete material estimate with cost.
Brick Calculation Formula
Wall Volume = Length(ft) × Height(ft) × Thickness(ft)
// Step 2: Volume of 1 Brick with mortar
Brick Vol = (L+mortar) × (H+mortar) × (W+mortar) in inches → convert to ft³
// Step 3: Number of bricks
Bricks = Wall Volume ÷ Brick Volume
// Step 4: Add wastage
Final Bricks = Bricks × (1 + wastage%/100)
// Step 5: Mortar (approx 30% of wall volume)
Mortar Vol = Wall Volume × 0.30 × 1.3 (dry factor)
// Step 6: Cement & Sand (for 1:5 ratio)
Cement Vol = Mortar Vol ÷ (1+5) × 1 → convert to bags
Sand Vol = Mortar Vol ÷ (1+5) × 5 → in CFT
Disclaimer
This brick calculator provides approximate estimates for planning purposes only. Actual material requirements may vary based on brick quality, mason skill, mortar application, and site conditions. Always consult a qualified civil engineer or contractor before purchasing materials for construction. We are not responsible for any material over-purchase or under-purchase based on these calculations.
