Brick Calculator – Plan Your Build With Precision
Whether you're building a retaining wall, patio, barbecue area, or renovating a feature wall, our free brick calculator helps you plan more accurately and avoid material shortages. Designed for both DIY enthusiasts and professional contractors, this tool simplifies your project planning and budgeting.
Why Use a Brick Calculator?
Calculating bricks manually can be time-consuming and prone to errors. By using our online brick calculator, you save time, reduce waste, and ensure cost efficiency. You can also factor in mortar thickness and a wastage percentage to get a precise total that covers cuts and breakage.
Key Features
- Switch between imperial (ft/in) and metric (m/cm) units
- Choose from standard brick sizes like Modular or Queen, or enter custom dimensions
- Include mortar joint thickness for more accurate results
- Add a wastage allowance to account for cuts, damage, and on-site loss
- Instant calculations with easy-to-understand results
How It Works
The tool calculates the number of bricks required by dividing the total surface area of your project by the area covered by each brick, including mortar spacing. You can adjust brick dimensions and joint gaps based on your materials. We then add a percentage buffer for wastage to ensure you order the right amount.
Common Brick Sizes
- Modular Brick: 7.5" × 2.25" (190 mm × 57 mm)
- Queen Brick: 7.625" × 2.75" (194 mm × 70 mm)
- Standard Brick (Australia): 230 mm × 76 mm
These are approximate sizes. Always measure your actual bricks or consult with your supplier before ordering.
Tips for Estimating Bricks
- Measure the area to be covered as accurately as possible (height × width)
- Always round up to the next full brick — it's better to have a few extra
- Add 5–10% extra bricks for wastage, especially for complex patterns or curved walls
- Consider hiring a professional if your project includes multiple surfaces or special design requirements
Related Masonry & Wall Calculators
Important Estimate Disclaimer
Results are provided for general planning purposes only and do not constitute engineering or structural design advice. Actual material quantities may vary based on site conditions, reinforcement design, slab thickness, and local building code requirements.
See our Methodology and Data Sources for calculation details.
Subgrade preparation, load-bearing requirements, expansion joints, and curing conditions can significantly affect final concrete volume. Structural or frost-exposed installations should be reviewed by a qualified professional.