🧱 Brick Calculator
Updated June 2026 · Brick prices ₹7-12/pc by region · Cement ₹340-450/bag
A 4.5 inch wall needs 6 bricks per square foot; a 9 inch wall needs 12. A 40×10 ft wall (400 sqft) at 4.5 inches needs about 2,520 bricks and 6 cement bags, costing roughly ₹24,500 at ₹9/brick. Enter your wall dimensions below to get exact quantities.
Brick Estimate
The Brick Math (Worked for a 40×10 ft Wall)
Here is the exact computation the calculator runs, using a 40 ft × 10 ft wall at 4.5 inches with bricks at ₹9/piece:
- Wall area: 40 × 10 = 400 sqft
- Bricks per sqft: 4.5" wall = 6 bricks/sqft (standard brick 190×90×90mm laid with 10mm mortar joint)
- Base brick count: 400 × 6 = 2,400 bricks
- Add 5% wastage: 2,400 × 1.05 = 2,520 bricks
- Cement for mortar: 2,520 × 0.002 bags × 1.1 (wastage) = ~6 bags
- Brick cost: 2,520 × ₹9 = ₹22,680
- Cement cost: 6 × ₹400 = ₹2,400
- Total estimated cost: ₹25,080
Brick count per sqft: 6 for 4.5" (single brick width) and 12 for 9" (double brick width), based on standard Indian brick size of 190×90×90mm per IS 1077. Wastage factor of 5% accounts for breakage during transport and laying. Mortar consumption of ~0.002 bags/brick is based on 1:4 cement:sand mortar mix.
Brick Quantity by Wall Size
How many bricks you need for common wall sizes, both 4.5" and 9" thickness:
| Wall Size | Area | 4.5" Bricks | 9" Bricks | Cement (4.5") | Cement (9") |
|---|---|---|---|---|---|
| 10×10 ft | 100 sqft | 630 | 1,260 | 2 bags | 3 bags |
| 20×10 ft | 200 sqft | 1,260 | 2,520 | 3 bags | 6 bags |
| 40×10 ft | 400 sqft | 2,520 | 5,040 | 6 bags | 12 bags |
| 50×10 ft | 500 sqft | 3,150 | 6,300 | 7 bags | 14 bags |
| 100×10 ft | 1000 sqft | 6,300 | 12,600 | 14 bags | 28 bags |
All quantities include 5% wastage. A 9" wall uses exactly double the bricks of a 4.5" wall. Most Indian homes use 9" for exterior walls and 4.5" for interior partitions.
Red Bricks vs AAC Blocks vs Fly Ash Bricks
The calculator assumes traditional red clay bricks, but you have alternatives that change both the count and cost:
| Material | Size | Per sqft (4.5") | Price/unit | Per sqft cost |
|---|---|---|---|---|
| Red clay brick | 190×90×90mm | 6 bricks | ₹7-12 | ₹42-72 |
| Fly ash brick | 230×110×75mm | 5 bricks | ₹6-10 | ₹30-50 |
| AAC block | 600×200×75mm | 1.2 blocks | ₹40-60 | ₹48-72 |
Fly ash bricks are cheaper and more uniform (less mortar needed). AAC blocks are larger (fewer units to lay), lighter, and offer better insulation, but cost similar per sqft. For a 400 sqft wall, fly ash bricks can save ₹3,000-5,000 versus red bricks.
The Common Mistake: Ordering Exact Count
People order exactly the number of bricks the math shows — then run short because of breakage during transport (5-8%), cutting bricks for corners and openings (3-5%), and rejects (uneven or burnt bricks, 2-3%). Always add 5% to the calculated count. The calculator includes this 5% wastage automatically. If you're ordering for a full house, some suppliers allow returning unused bricks — ask before ordering.
Edge Case: Curved Walls and Arches
Curved walls, arches, and decorative brickwork require cutting more bricks at angles, increasing wastage to 10-15%. For these elements, add 15% wastage instead of the standard 5%, and budget extra time for the mason — curved brickwork takes 2-3x longer than straight walls.
Decision Framework: 4.5" vs 9" Walls
- Exterior walls: Use 9" (double brick) for structural strength, weather protection, and better thermal insulation. Most Indian building codes require 9" for exterior load-bearing walls.
- Interior partition walls: Use 4.5" (single brick) to save space and cost. Non-load-bearing partitions don't need double thickness.
- Budget constrained: Use 4.5" for all walls if non-load-bearing (small sheds, boundary walls under 6ft). Halves your brick cost.
- Sound insulation needed: Use 9" even for interior walls between bedrooms or near roads. The extra mass blocks significantly more sound.
The 2-Minute Self-Check
- Measure your wall: length × height in feet. Subtract door and window openings.
- Set the wall type: 4.5" for interior partitions, 9" for exterior walls.
- Enter your local brick price (check with 2-3 suppliers — prices vary ₹7-12/pc by region).
- Run the calculator. The result includes 5% wastage — don't add more unless you have curves or arches.
- Order in lots of 500-1000 bricks for better per-unit pricing from suppliers.
Your Next Steps
- Run the calculator for each wall in your project, or calculate total wall area and run it once.
- Check cement needs at the Cement Calculator for foundation and slab concrete.
- Estimate steel for your RCC frame at the Steel Calculator.
- See your total project cost at the House Cost Calculator.
- Check current material prices in your city at our city-wise material prices page.
Frequently Asked Questions
How many bricks are in 1 square foot of wall?
A 4.5 inch (single brick) wall uses about 6 bricks per square foot. A 9 inch (double brick) wall uses about 12 bricks per square foot. Add 5% for wastage and breakage.
How many cement bags do I need for 1000 bricks?
You need about 2-3 cement bags for mortar to lay 1000 bricks in a 4.5 inch wall, and about 4-5 bags for a 9 inch wall. Mortar ratio is typically 1:4 (cement:sand) for brickwork.
How much does a brick wall cost per square foot in India?
At ₹9/brick and ₹400/cement bag, a 4.5 inch wall costs about ₹62/sqft (6 bricks + mortar). A 9 inch wall costs about ₹120/sqft (12 bricks + mortar). Prices vary by city — check your local material rates.
Should I use red bricks or AAC blocks?
Red bricks cost ₹7-12/pc and need 6 per sqft. AAC blocks cost ₹40-60/pc but need only 1.2 per sqft. Per sqft, costs are similar (₹42-72). AAC blocks are lighter, faster to lay, and offer better insulation. Fly ash bricks are the cheapest option at ₹30-50/sqft.
Editor Note
Reviewed June 2026. Brick count per sqft (6 for 4.5 inch, 12 for 9 inch) is based on standard Indian brick size (190x90x90mm) per IS 1077. Mortar consumption assumes a 1:4 cement:sand mix. Wastage factor of 5% covers breakage and cutting. If you spot an outdated figure, please contact us.