Bricks Quantity Calculator
Calculate bricks, cement, and sand for walls with custom brick sizes.
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What is a Bricks Quantity Calculator?
A Bricks Quantity Calculator estimates the number of bricks, cement bags, and sand needed for wall construction. It uses the Volume Method - dividing total wall volume by brick volume (including mortar) to get precise quantities.
Unlike simple rule-of-thumb calculators, this tool supports 5 brick types (Red Clay, Modular, Fly Ash, AAC Block, Concrete Block) and customizable mortar ratios for accurate material planning.
The calculator automatically computes cement bags and sand volume based on your selected mortar ratio, including dry volume conversion for procurement.
Multiple Brick Types
5 options: Red Clay, Modular, Fly Ash, AAC Block, and Concrete Block with correct dimensions.
Volume Method
Precise calculation using wall volume ÷ brick volume, works for any size or thickness.
Mortar Breakdown
Cement bags and sand volume calculated based on your mortar ratio (1:4, 1:5, 1:6).
Opening Deduction
Deduct door/window areas from calculation for accurate material quantities.
How to Calculate Bricks
Enter Wall Dimensions
Length × Height in feet, Thickness in inches. Deduct door/window areas.
Select Brick Type
Choose Red Clay for standard, AAC for lightweight, or Concrete Block for strength.
Configure Mortar
1:6 is standard. Use 1:4 for load-bearing. Adjust wastage (5% typical).
Get Material List
View bricks, cement bags, sand. Download or print for procurement.
Brick Types Comparison
| Brick Type | Size (inch) | Per 100 sq.ft | Best For |
|---|---|---|---|
| Red Clay Standard | 9×4.5×3 | ~500-550 | General construction |
| Modular Brick | 7.5×3.5×3.5 | ~650-700 | Uniform finish |
| Fly Ash Brick | 9×4×3 | ~550-600 | Eco-friendly builds |
| AAC Block | 24×8×8 | ~60-70 | High-rise, fast build |
| Concrete Block | 16×8×8 | ~90-100 | Load-bearing walls |
* Per 100 sq.ft counts are for 9-inch thick wall. 4.5-inch wall uses approximately half.
Mortar Mix Ratios
Load-bearing walls, damp areas. Uses more cement.
Exterior walls, exposure areas. Good balance.
Most common for general walls. Economical.
Volume Method Formula
Wall Volume = L × H × T
Brick Vol (with mortar) = (l+m) × (w+m) × (h+m)
Bricks = Wall Vol ÷ Brick Vol
Mortar Vol = Wall Vol − (Bricks × Brick Vol)
Where m = mortar thickness (0.5 inch typical)
Pro Tips for Brick Masonry
Soak bricks - Wet bricks before laying to prevent mortar water absorption.
Add 5-10% extra - Order extra for breakage and future repairs.
Check quality - Good bricks ring when struck, don't break easily.
Cure properly - Water-cure walls for 7-14 days for strength.
Uniform joints - Maintain 10-12mm mortar thickness throughout.
Plumb check - Verify wall verticality with plumb bob regularly.
Common Use Cases
Boundary Walls
Compound walls, property boundaries. 9-inch thick with pillars.
Room Construction
Load-bearing and partition walls for new rooms or extensions.
Contractor Verification
Verify material estimates from masons. Ensure accurate billing.
Frequently Asked Questions
How many bricks are needed for 100 sq ft wall?
For a 9-inch thick wall using standard bricks (9×4.5×3 inch): approximately 1000 bricks per 100 sq.ft. For 4.5-inch wall: about 500 bricks. Add 5-10% for wastage. Our calculator provides exact quantities based on your brick size.
What is the formula to calculate number of bricks?
Volume Method: Number of Bricks = Wall Volume ÷ (Brick Volume + Mortar). Wall Volume = Length × Height × Thickness. Brick Volume includes mortar thickness on all sides. This method works for any brick size or wall thickness.
How much cement is needed for 1000 bricks?
For 1:6 mortar ratio (standard): approximately 1.5-2 bags (75-100 kg) cement per 1000 bricks. For 1:4 ratio (stronger): about 2.5-3 bags. Actual quantity depends on brick size and mortar thickness.
What is the difference between modular and standard bricks?
Standard Indian brick: 9×4.5×3 inch (229×114×76 mm). Modular brick: 7.5×3.5×3.5 inch (190×90×90 mm). Modular bricks are smaller but more uniform. They require less mortar and are easier to handle. Both are red clay bricks.
Are AAC blocks better than red bricks?
AAC (Autoclaved Aerated Concrete) blocks are: 60% lighter, better thermal insulation, faster to lay (larger size), and more consistent. However, they cost more, need special adhesive, and are weaker for structural loads. Best for infill walls.
What is mortar ratio and which to use?
Mortar ratio is cement:sand proportion. 1:6 (standard): economical, for general walls. 1:5 (medium): exterior walls, damp areas. 1:4 (strong): load-bearing, high-moisture areas. Higher cement = stronger but more expensive.
How much sand is needed per cement bag?
Depends on mortar ratio. 1:6 ratio: 6 cu.ft sand per bag. 1:4 ratio: 4 cu.ft sand per bag. One cement bag = 1.25 cu.ft. Calculate total dry mortar volume and apply ratio.
Why add wastage percentage to brick calculation?
Wastage covers: breakage during transport (2-3%), cutting at corners/openings (2-3%), damaged bricks in delivery (1-2%), and extras for future repairs. 5% is standard, use 10% for complex walls with many openings.
What is the standard thickness for boundary walls?
9-inch (double brick) is standard for boundary/compound walls - provides strength and stability. 4.5-inch (single brick) only for internal partitions, low garden walls, or where pillars support the structure.
How to calculate bricks for walls with openings?
Calculate total wall area, then deduct door/window areas. Standard door: 21 sq.ft (7×3 ft). Standard window: 15 sq.ft (5×3 ft). Our calculator has a deduction field - enter total opening area in sq.ft.