Brick Calculator

How to Calculate Bricks for a Wall

Estimating brick quantities accurately saves money and prevents project delays. The calculation involves three factors: wall area, brick size (including mortar joints), and a waste factor for cuts and breakage.

The basic formula: Bricks = Wall Area (sq ft) × Bricks per Square Foot. For standard US bricks with 3/8-inch mortar joints, the rate is approximately 6.75 bricks per square foot for a single-wythe (one brick thick) wall.

The Brick Formula

Wall Area = Length × Height (minus openings)
Brick Face Area = (Brick Length + Joint) × (Brick Height + Joint)
Bricks per Sq Ft = 144 ÷ Brick Face Area (in sq inches)
Total Bricks= Wall Area × Bricks per Sq Ft × 1.10 (waste factor)

Brick Sizes and Types

Brick dimensions vary by type and region. In the US, the most common sizes are:

• Standard: 8 × 2¼ × 3⅝ inches. The traditional US brick size, requiring about 6.75 bricks per sq ft.
• Modular: 7⅝ × 2¼ × 3⅝ inches. Designed to create 8-inch modules with mortar, the most commonly used size in modern construction.
• Queen: 7⅝ × 2¾ × 3⅝ inches. Taller than standard, requiring fewer courses for the same wall height.
• King: 9⅝ × 2⅝ × 3⅝ inches. Larger face area, used for decorative and commercial applications.

Mortar Types and Quantities

Mortar selection depends on the application and structural requirements per ACI 530/TMS 402:

• Type N: General-purpose mortar for above-grade exterior walls. 750 PSI compressive strength. Most common for residential brickwork.
• Type S: Higher strength (1,800 PSI) for below-grade walls, retaining walls, and high-wind zones. Required in seismic zones per building code.
• Type M: Maximum strength (2,500 PSI) for foundations, retaining walls, and heavy load-bearing applications.
• Type O: Low strength (350 PSI) for interior non-load-bearing walls and repointing old brickwork.

Pre-mixed mortar comes in 60–80 lb bags. Budget approximately 7 bags per 1,000 standard bricks with 3/8-inch joints. Thicker joints or larger bricks require more mortar.

Brick Wall Construction Best Practices

Following masonry best practices ensures structural integrity and long-lasting walls:

• Maintain consistent mortar joint thickness (3/8 inch is standard per ASTM C270)
• Stagger joints between courses (running bond pattern) for structural strength
• Install wall ties every 16 inches vertically and 24 inches horizontally for brick veneer per IRC R703.8
• Include weep holes at the base of veneer walls every 24–33 inches for drainage
• Leave 1-inch air space between veneer and sheathing for moisture management
• Use flashing at the base, above windows, and above doors to redirect water

Cost Factors for Brick Projects

Material costs are just part of the total project budget. A complete cost breakdown includes:

• Bricks: $0.50–$1.00 for common brick; $1.50–$5.00+ for face brick, depending on color, texture, and manufacturer
• Mortar: $8–$15 per 60-lb bag, or $8–$12 per cubic foot for site-mixed
• Labor: $8–$15 per square foot for professional installation. An experienced mason lays 300–500 bricks per day
• Scaffolding: $0.50–$1.50 per sq ft for walls over 4 feet high
• Lintels: $50–$200 each for steel angle lintels above openings

Frequently Asked Questions

How many bricks do I need per square foot?

For standard bricks (8 × 2¼ inches) with 3/8-inch mortar joints, you need approximately 6.75 bricks per square foot for a single-wythe wall. Modular bricks require about 6.86 per square foot. Always add 10% for cuts and breakage.

How much mortar do I need for 1000 bricks?

Approximately 7 bags (70 lbs each) of pre-mixed mortar per 1,000 standard bricks with 3/8-inch joints. For thicker 1/2-inch joints, increase to about 9 bags. Site-mixed mortar requires about 21 cubic feet per 1,000 bricks.

How much does a brick cost?

Standard clay bricks cost $0.50–$1.00 each at building supply stores. Specialty face bricks, handmade bricks, and imported varieties range from $1.50 to $5.00+. Buying full pallets (typically 500 bricks) gives the best unit price.

What is the standard brick size?

The US standard brick is 8 × 2¼ × 3⅝ inches (L × H × D). With mortar joints, the modular dimension is nominally 8 × 2⅔ inches per course. International sizes differ — UK standard is 215 × 102.5 × 65 mm.

How do I account for doors and windows?

Subtract the opening area from total wall area before calculating brick count. A standard door is about 21 sq ft (3×7 ft), a standard window about 12 sq ft (3×4 ft). The 10% waste factor in our calculator partially compensates for small openings.

What mortar type should I use?

Type N for above-grade exterior and interior load-bearing walls. Type S for below-grade, retaining walls, and high-wind areas. Type M for foundations. Type O for interior non-load-bearing walls and repointing. Always check local building codes.

Related Calculators

• Concrete Block Calculator — CMU blocks for walls
• Retaining Wall Calculator — blocks and backfill for retaining walls
• Concrete Calculator — for footings and foundations

Estimates are for planning purposes only. Brick dimensions and mortar coverage vary by manufacturer. Consult a licensed mason and check local building codes (IRC Chapter 6, ACI 530) for structural requirements.