Brick Quantity Calculator Australia 2026 | Free Online Tool
Australian Standards Compliant
Brick Quantity Calculator Australia
Professional-grade calculator for brick walls and construction projects
Accurate brick quantities, mortar volumes, and cost estimates for AS 3700 compliance. Free, instant calculations for residential and commercial projects.
AS 3700 Compliant
Instant Results
Free to Use
Mobile Friendly
🧱 Australian Brick Quantity Calculator
Professional brickwork calculations for residential and commercial projects
✓ Accurate Calculations
Calculate exact brick quantities for walls using Australian Standard AS 3700 specifications. Our calculator accounts for brick size, bond patterns, wastage factors, and mortar joints to ensure you order the right quantity every time.
✓ Cost Estimation
Get instant cost estimates based on 2026 Australian brick prices. Compare standard clay bricks versus concrete blocks, and understand delivery costs and material requirements for your specific project size.
✓ Professional Standards
Designed for builders, bricklayers, and owner-builders working on projects requiring compliance with AS 3700 masonry structures standards. Includes mortar calculations and joint sizing recommendations.
🧱 Calculate Brick Quantity
Select brick type and enter wall dimensions below
Wall Dimensions
Total wall length
Floor to ceiling height
Select construction type
Typical joint size as per AS 3700
Openings (Optional)
Combined window openings
Combined door openings
Accounts for cuts, breakage, and wastage
Total Bricks Required
0
Including wastage allowance
Quantity Breakdown
Base Quantity
0
Wastage Added
0
Wall Area
0 m²
Bricks per m²
0
💰 Cost Estimate (2026 Prices)
Brick Cost Range$0 - $0
Mortar Required0 m³
Mortar Bags (20kg)0 bags
Estimated Weight0 tonnes
Brick Wall Dimension Reference
Standard stretcher bond pattern commonly used in Australian construction
Understanding Brick Calculations in Australia
Brick quantity calculations determine how many bricks are needed for masonry walls, accounting for brick size, mortar joints, bond patterns, and wastage. In Australia, brickwork must comply with AS 3700 (Masonry Structures) and AS 4456 (Masonry Units), with specifications for dimensions, strength, and construction methods.
Standard Australian Brick Sizes
Standard Work Size: 230mm (L) × 110mm (W) × 76mm (H)
Modular Brick: 290mm × 90mm × 90mm
King Size: 230mm × 110mm × 73mm
Jumbo Brick: 290mm × 90mm × 110mm
Note: Work sizes include standard 10mm mortar joints on all sides
Bricks Per Square Metre
Standard Brick: Approximately 50 bricks/m² (single skin)
Modular Brick: Approximately 40 bricks/m² (single skin)
King Size: Approximately 52 bricks/m² (single skin)
Factors: Varies with mortar joint thickness and bond pattern
Cavity Walls: Double the quantity for two-skin cavity construction
Common Wall Types in Australia
Single Brick Wall: 110mm thick, one brick wythe, common for internal walls
Cavity Wall: Two brick skins with 50mm cavity, standard for external walls
Double Brick: 230mm thick, two wythes solid, traditional construction
Veneer: Single skin brick with timber or steel frame backing
Calculation Formulas Explained
Our brick calculator uses industry-standard formulas to compute quantity based on wall area, brick dimensions, and mortar joint sizing for Australian construction practices.
Basic Brick Quantity Formula
Gross Wall Area (m²) = Length (m) × Height (m)
Net Wall Area = Gross Area - Window Area - Door Area
Bricks Required = Net Area × Bricks per m² × Wall Type Multiplier
Example: For a 12m × 2.4m wall (28.8 m²) with standard bricks:
Why Needed: Covers broken bricks, cuts, and mismatches
Step 4: Review Results
Total Bricks: Complete quantity to order including wastage
Mortar Volume: Cement/sand mixture required for joints
Cost Estimate: Budget planning based on 2026 prices
Weight: Important for delivery logistics and site access
Australian Brick Types and Specifications
Australian Standard AS 4456 defines brick classifications, dimensions, and performance requirements. Understanding brick types helps select appropriate materials for climate, aesthetics, and structural requirements.
Brick Type
Work Size (mm)
Bricks per m²
Average Cost
Standard Clay Brick
230 × 110 × 76
50
$0.80 - $2.50 each
Modular Brick
290 × 90 × 90
40
$1.20 - $3.00 each
King Size Brick
230 × 110 × 73
52
$0.90 - $2.70 each
Jumbo Brick
290 × 90 × 110
35
$1.50 - $3.50 each
Concrete Block
390 × 190 × 190
12.5
$2.50 - $4.00 each
Besser Block
390 × 190 × 190
12.5
$2.00 - $3.50 each
Standard Clay Brick
Work Size230×110×76mm
Per m²50 bricks
Cost Each$0.80 - $2.50
Modular Brick
Work Size290×90×90mm
Per m²40 bricks
Cost Each$1.20 - $3.00
King Size Brick
Work Size230×110×73mm
Per m²52 bricks
Cost Each$0.90 - $2.70
Jumbo Brick
Work Size290×90×110mm
Per m²35 bricks
Cost Each$1.50 - $3.50
Concrete Block
Work Size390×190×190mm
Per m²12.5 blocks
Cost Each$2.50 - $4.00
Material Specifications and Assumptions
This calculator uses industry-standard values and Australian construction practices. Understanding these assumptions helps with accurate planning and material ordering for your brickwork project.
Parameter
Value
Notes
Mortar Joint Thickness
10mm standard
AS 3700 typical specification
Brick Weight (Standard)
3.0 - 3.5 kg
Clay brick average
Mortar Volume
0.02 m³/m²
Approximate for standard joints
Mortar Mix Ratio
1:4 or 1:5
Cement:Sand (by volume)
Brick Cost Range (2026)
$0.80 - $3.50
Varies by type and supplier
Delivery Charges
$150 - $400
Distance and quantity dependent
Standard Bond Pattern
Stretcher bond
Most common Australian pattern
Bricklaying Rate
400-600/day
Experienced bricklayer average
Mortar Specifications
Joint Thickness10mm
Volume per m²0.02 m³
Mix Ratio1:4 or 1:5
Brick Properties
Standard Weight3.0 - 3.5 kg
Price Range$0.80 - $3.50
Year2026
Construction Rates
Bond PatternStretcher
Bricklaying Rate400-600/day
Delivery Cost$150 - $400
Construction Tips and Best Practices
Proper bricklaying technique ensures structural integrity, weather resistance, and compliance with Australian building standards. Follow these industry best practices for quality brickwork.
✅ Before Starting Brickwork:
Obtain building permits and engineering certifications from your local council
Verify brick delivery quantities match your order—count pallets on arrival
Store bricks on level ground, covered with tarp to prevent moisture absorption
Check mortar mix proportions comply with AS 3700 requirements
Establish string lines and ensure first course is perfectly level
Prepare damp-proof course (DPC) installation at base of walls
💡 During Bricklaying:
Maintain consistent 10mm mortar joints throughout the wall
Butter both ends of each brick before placement for solid vertical joints
Check plumb and level every 3-4 courses using spirit level
Tool joints when mortar is "thumbprint" firm for weather resistance
Clean excess mortar off face of bricks before it hardens
Use half-bricks and closers to maintain proper bond pattern
Install wall ties in cavity walls every 450mm horizontally and 600mm vertically
🔨 Quality Control:
Keep mortar joints consistent—variations weaken wall and look unprofessional
Ensure cavity walls have clean cavities—no mortar droppings blocking weepholes
Install weepholes every 1200mm in bottom course above DPC
Protect fresh brickwork from rain for 24-48 hours using plastic sheeting
Don't build more than 1.2m height per day in hot weather
Clean tools and equipment immediately after each work session
Schedule building inspector visits as required by council regulations
🌡️ Weather Considerations:
Avoid bricklaying when temperatures fall below 5°C or exceed 35°C
Hot weather: Keep bricks damp, use retarders in mortar, work in shade where possible
Cold weather: Protect walls from frost, don't lay if rain or frost predicted within 24 hours
Rainy conditions: Cover wall tops and fresh work immediately
Windy conditions: Protect mortar from rapid drying, adjust mix if necessary
Mortar Mixing and Specifications
Mortar quality directly affects brick wall strength, durability, and weather resistance. Australian Standard AS 3700 specifies mortar grades and mix proportions for different applications.
Standard Mortar Mixes
M3 Mix (General Purpose): 1:1:6 (cement:lime:sand) by volume
M2 Mix (Higher Strength): 1:0.5:4.5 ratio, used for structural walls
M4 Mix (Internal): 1:2:9 ratio, suitable for internal non-loadbearing walls
Water Content: Add water gradually until "wet mud" consistency achieved
Mortar Material Quantities
For 1m² Single Brick: Approximately 0.02 m³ mortar required
Cement Needed: 2-3 kg per m² of brickwork
Sand Needed: 0.02 m³ (20 litres) per m² approximately
Lime (If Used): 0.5-1 kg per m² depending on mix design
Mixing Time: Minimum 5 minutes in mechanical mixer for consistency
Mortar Working Properties
Workability Time: Use within 2 hours of mixing (1 hour in hot weather)
Joint Tooling: Tool when thumbprint firm (30-60 minutes after laying)
Curing: Keep moist for 72 hours in hot/dry weather
Strength: Reaches 80% strength in 7 days, full strength in 28 days
Retempering: Never add water to stiffened mortar—discard and mix fresh
About This Calculator
This Brick Quantity Calculator is specifically designed for Australian construction projects and complies with AS 3700 and AS 4456 standards. It provides accurate quantity calculations for the most common brick types used in Australian residential and commercial construction.
Calculator Features
Multiple Brick Types: Standard, modular, king size, and jumbo bricks
Accurate Formulas: Uses AS 3700 specifications with proper joint sizing
Wastage Factors: Adjustable allowances from 5% to 20% for different skill levels
Cost Estimates: Current 2026 Australian brick pricing ranges
Mortar Calculations: Volume and bag quantities for mortar mixing
Who Should Use This?
Professional Bricklayers: Quick material estimates and order quantities
Owner-Builders: Planning and budgeting for brickwork projects
Builders: Tender preparation and material scheduling
Architects: Preliminary quantity checks for design specifications
Estimators: Cost calculations for project quotations
Important Disclaimer
Estimate Only: This calculator provides quantity estimates—always verify with engineering drawings
Site-Specific: Actual requirements depend on wall complexity, openings, and design details
Professional Design: Structural brickwork requires engineering certification
Verify Orders: Always add appropriate wastage and verify quantities before final ordering
Interesting Facts About Brickmaking
Ancient Origins: Bricks have been used for over 10,000 years. The oldest discovered bricks date back to 7500 BC in what is now Turkey.
Australian Brick Industry: Australia produces over 1.2 billion bricks annually, with clay bricks remaining the most popular choice for residential construction.
Firing Temperature: Modern clay bricks are fired in kilns at temperatures between 900-1200°C, vitrifying the clay and creating their characteristic strength and durability.
Thermal Mass Benefits: Brick walls provide excellent thermal mass, absorbing heat during the day and releasing it at night, improving home energy efficiency by up to 20%.
Colour Variations: Brick colours come from different clay types and iron oxide content—red bricks have high iron, while yellow bricks contain limestone.
Longevity Champion: Properly maintained brick buildings can last centuries. Many Victorian-era brick homes in Melbourne and Sydney are still structurally sound after 150+ years.
Recycling Record: Bricks are one of the most recycled building materials. Cleaned recycled bricks sell for $0.80-1.50 each and are popular for feature walls and restoration projects.
Frequently Asked Questions
How many bricks do I need per square metre in Australia?
For standard Australian bricks (230mm × 76mm work size), you need approximately 50 bricks per square metre for a single-skin wall. This assumes 10mm mortar joints on all sides. Modular bricks require about 40 per m², king size bricks need 52 per m², and jumbo bricks use 35 per m². For cavity walls (double skin), double these quantities. The calculation accounts for both horizontal and vertical mortar joints as specified in AS 3700. Always add 5-15% wastage for cuts, breakage, and colour matching.
How much do bricks cost in Australia in 2026?
Standard clay brick prices in 2026 range from $0.80 to $2.50 each, depending on type, quality, and supplier location. Basic face bricks cost $0.80-1.20, while premium designer bricks can reach $2.00-3.50 each. Modular and jumbo bricks are typically more expensive at $1.20-3.00 per unit. Concrete blocks cost $2.00-4.00 each. These prices exclude delivery, which typically adds $150-400 depending on distance and quantity. Metropolitan areas generally have lower prices than regional locations. Bulk orders may qualify for discounts of 5-15%.
What is the standard brick size in Australia?
The standard Australian brick work size is 230mm (length) × 110mm (width) × 76mm (height), as defined in AS 4456. This is the "work size" which includes a 10mm mortar joint on all sides. The actual brick dimensions are typically 220mm × 100mm × 66mm. This standard size has been used in Australia for over 100 years and represents approximately 50 bricks per square metre in single-skin walls. Other common sizes include modular (290×90×90mm), king size (230×110×73mm), and jumbo (290×90×110mm), but standard bricks remain most popular for residential construction.
Should I use single brick or cavity wall construction?
Cavity walls are the Australian standard for external walls and are required by the Building Code of Australia (BCA) in most climate zones. Cavity walls consist of two brick skins separated by a 50mm air gap, providing superior weather protection, thermal insulation, and moisture control. Single brick walls (110mm) are suitable only for internal walls or in dry climates with proper weather protection. Double brick walls (230mm solid) are traditional but less common now due to moisture bridging issues. The cavity allows water drainage, prevents moisture penetration, and improves energy efficiency. Always follow NCC requirements and engineering specifications for your specific location.
How much wastage should I allow when ordering bricks?
Standard industry practice recommends 10% wastage for most brickwork projects. This accounts for broken bricks during delivery and handling (2-3%), cuts around windows and doors (3-5%), and colour/size variations requiring replacements (2-3%). Experienced bricklayers on simple, straight walls may only need 5% wastage. Complex designs with arches, curves, or feature work should allow 15-20% wastage. Inexperienced owner-builders should budget 15-20% to avoid running short. It's better to have a few extra bricks than to run short mid-project, as matching colours and batches can be difficult. Leftover bricks can be returned to some suppliers or saved for future repairs.
What mortar mix should I use for brickwork in Australia?
For general residential brickwork, use M3 mortar specified in AS 3700, which is a 1:1:6 mix (cement:lime:sand) by volume. For higher strength requirements or structural walls, use M2 mortar (1:0.5:4.5 ratio). Lime improves workability and flexibility but can be omitted for a simpler 1:5 cement:sand mix for general work. Add water gradually until achieving "wet mud" consistency—mortar should hold its shape but spread easily. Mix for at least 5 minutes in a mechanical mixer for consistency. Use within 2 hours (1 hour in hot weather) and never re-temper stiffened mortar. For coastal areas, use sulfate-resistant cement to prevent salt degradation.
How long does it take to lay 1000 bricks?
An experienced bricklayer typically lays 400-600 bricks per day in standard residential construction, meaning 1000 bricks takes approximately 1.5-2.5 days. Factors affecting speed include wall complexity, scaffolding requirements, mortar mixing arrangements, and weather conditions. Simple straight walls can be faster (700+ bricks/day for skilled workers), while walls with many openings, corners, or feature work are slower (300-400 bricks/day). Apprentices and owner-builders should expect 150-300 bricks per day initially. Complex bond patterns like Flemish or English bond take 20-30% longer than stretcher bond. Professional rates include time for mixing mortar, setting up, and cleaning.
Do I need a structural engineer for brick walls?
Yes, structural engineering is required for all load-bearing brick walls in Australia. AS 3700 mandates that masonry structures be designed by a qualified structural engineer, with certification submitted for building approval. Even simple residential brick walls carry roof and floor loads that must be properly calculated. Engineers specify wall thickness, reinforcement requirements, foundation size, and connection details. Non-structural brick veneers still require engineering for wind loading, wall ties, and lintel sizing. Owner-builders cannot design structural brickwork themselves—council approval requires engineering certification. Expect to pay $800-2,500 for residential brick wall engineering depending on project complexity. This investment prevents structural failure and insurance issues.
Can I use this calculator for concrete blocks or besser blocks?
While this calculator focuses on brick quantities, the principles apply to concrete blocks with adjusted values. Standard concrete blocks (390mm × 190mm) require approximately 12.5 blocks per m² compared to 50 bricks per m². Simply divide the brick quantity by 4 to estimate concrete blocks (1 block ≈ 4 bricks approximately). However, concrete block construction has different mortar requirements—blocks need more mortar due to their hollow cores and larger size (approximately 0.03-0.04 m³ per m²). Blocks are typically heavier (12-15 kg each versus 3-4 kg for bricks) affecting delivery and handling. For accurate concrete block calculations, use a dedicated block calculator or consult your engineer's specifications.
Should I buy extra bricks for future repairs and maintenance?
Yes, always purchase 50-100 extra bricks beyond your calculated quantity plus wastage. Brick batches vary in colour, texture, and exact size even from the same manufacturer, making future matching difficult or impossible. Store extras in a dry location wrapped in plastic for future repairs, additions, or damage replacement. This is especially important for designer or custom-coloured bricks, which may be discontinued. Extra bricks add minimal cost ($40-150 typically) but provide peace of mind for decades. Many builders recommend keeping extras for at least 2-5 years post-construction. Take photos of brick pallets showing batch numbers for future reference if you need to order matching bricks years later.
