Why do we include mortar in the calculation?

Mortar fills the joints between bricks, which in a typical wall occupies about 15–20% of the total wall volume. If you ignore mortar and divide wall volume by bare-brick volume, you over-estimate the brick count by that margin. Including a 10 mm mortar layer on the top and side of each brick gives a realistic count.

How much mortar do I need for a brick wall?

Mortar typically represents 20–25% of the wall volume. For a 1 m³ brick wall, you need about 0.25 m³ of mortar. A 1:5 cement-sand mortar ratio is common — that's roughly 1.5 bags of cement and 0.25 m³ of sand for every 0.25 m³ of mortar. Always mix fresh; used mortar cannot be re-hydrated.

How many bricks per square meter of wall?

For a single-brick wall (230 mm thick) using Pakistani standard bricks: approximately 55 bricks per square meter of wall surface. For a double-brick wall (460 mm thick): approximately 110 bricks per square meter. These are working estimates — always verify with this calculator using your specific dimensions and waste percentage.

What are brick costs in Pakistan in 2024?

Kiln-fired 'Awwal' grade bricks typically cost PKR 12–20 each depending on region, kiln reputation, and market conditions. Lower grades ('Do Number') are cheaper but weaker and should not be used for load-bearing walls. Always inspect a sample batch for sound ring, consistent color, and sharp edges before committing to a large order.

How much waste should I allow?

10% is standard for straight walls. 15% for walls with many window or door openings (more cuts), corners, or curved sections. Plan for slightly more if you're doing fair-face exposed brickwork, because only flawless bricks are used on the exposed face and imperfect ones go behind.

What is the difference between First-Class and Second-Class bricks?

First-Class ('Awwal') bricks are fully kiln-fired, have sharp edges, uniform color, a metallic ringing sound when struck, and a compressive strength of 14+ N/mm². Second-Class ('Do Number') bricks are underfired, softer, chip easily, and are suitable only for non-load-bearing internal partitions. Always insist on First-Class for structural walls.

Should I use bricks or concrete blocks?

Bricks are traditional, cheaper per unit, and easier for small sites. Concrete blocks are larger (so faster to lay), more consistent dimensionally, and often cheaper on a cost-per-m² basis. Bricks insulate slightly better; blocks are usually stronger. The choice depends on local material costs, labor skill, and architectural style.

Brick Calculator

Construction

Calculate the number of bricks needed for a wall with mortar allowance.

Construction

Brick Calculator

Generated on April 24, 2026

Wall (meters)

Length

Height

Thickness

Brick Size (meters) & Waste

Length

Height

Width

Waste %

Wall VolumeNaN m³

Bricks NeededNaN

Total with Waste

NaN bricks

Estimated mortar: NaN m³

Step-by-step calculation

Formula

Wall vol = L × H × T. Bricks = ⌈wall vol ÷ (brick vol with mortar)⌉.

1Wall volume = NaN × NaN × 0.23 = NaN m³
2Brick + 10 mm mortar joint = (0.23+0.01) × (0.114+0.01) × 0.076 = 0.00226 m³
3Base bricks = ⌈NaN ÷ 0.00226⌉ = NaN
4Add 10% waste: ⌈NaN × 1.10⌉ = NaN bricks
5Mortar volume ≈ wall vol − (bricks × brick solid vol) = NaN m³

?What is the Brick Calculator?

A brick calculator determines how many bricks you need to build a wall of given length, height, and thickness, factoring in mortar joints and a waste allowance for breakage and cutting. This is essential for homeowners planning a boundary wall, contractors preparing material quotes, and engineers sizing bulk-material purchases. It uses Pakistani standard brick dimensions (230 × 114 × 76 mm) by default but can be adjusted for modular or imperial bricks. The mortar allowance ensures you don't over-order by ignoring joint volume or under-order by treating bricks as exact-fit.

The Formula

Bricks = Wall Volume ÷ (Brick + Mortar Volume). Add waste percentage on top.

Each brick in a wall takes up slightly more than its own volume, because mortar fills the 10 mm joints between and above/below it. The 'effective brick + mortar' unit volume is larger than the bare-brick volume. Dividing the wall's total volume by this effective unit gives a realistic brick count. A 10% waste margin covers breakage during transport and on-site handling, plus the cuts needed at corners, window openings, and electrical-box locations.

Practical Examples

A 5 × 3 × 0.23 m wall (single-brick thickness) using standard Pakistani bricks with 10% waste needs approximately 520 bricks.

Single-brick walls (230 mm thick) are cheaper and faster but provide less insulation and strength than double-brick walls (460 mm thick).

Modular US bricks (203 × 92 × 57 mm) are smaller than Pakistani standard, so more bricks are needed for the same wall.

Mortar joints are typically 10 mm thick — thicker joints mean fewer bricks but more mortar.

A standard Pakistani single-brick wall requires about 55 bricks per square meter; a double-brick wall about 110 bricks per square meter.

For a 100-foot-long, 8-foot-high boundary wall (single brick thickness), plan for roughly 4,000 bricks including waste.

Frequently Asked Questions

230 × 114 × 76 mm (approximately 9 × 4.5 × 3 inches) is the most common kiln-fired brick (locally called 'Awwal' or 'first-class') used across most of Pakistan. Modular bricks are slightly smaller. The exact dimensions can vary by a few millimeters between kilns, which is one reason to include a waste margin.

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Brick Calculator

Brick Calculator

Wall (meters)

Brick Size (meters) & Waste

Step-by-step calculation

?What is the Brick Calculator?

The Formula

Practical Examples

Frequently Asked Questions

What is the standard brick size in Pakistan?

Why do we include mortar in the calculation?

How much mortar do I need for a brick wall?

How many bricks per square meter of wall?

What are brick costs in Pakistan in 2024?

How much waste should I allow?

What is the difference between First-Class and Second-Class bricks?

Should I use bricks or concrete blocks?

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