Calculate how many bricks you need for your wall or building project. Enter your wall measurements, brick dimensions and mortar joint thickness, then allow for openings and wastage to estimate your required quantity.
Use the calculator below to plan your brick order.
Construction calculator
Brick Calculator
Enter your project measurements for a planning estimate.
Method & assumptions
Openings are deducted before wastage. Quantities are estimates; check product dimensions and supplier coverage.
All applicable wastage percentages are added to the net quantity. Whole packs, bags and pieces are rounded up.
Planning estimate only. Confirm quantities, product specifications and rates with your supplier or contractor. This tool does not provide structural design or establish compliance with local building rules.
How to Use the Brick Calculator
Measure your wall. Enter its length and height using the units shown in the calculator.
Enter your brick dimensions. Use the actual dimensions supplied by your brick manufacturer.
Allow for mortar joints. Enter the planned joint thickness.
Deduct openings. Account for doors, windows and other areas that do not require brickwork.
Add wastage. Include an allowance for cutting, breakages and handling.
Check your estimate. Confirm the quantity with your supplier or contractor before ordering.
For several walls, calculate each wall separately and add the quantities together. Check whether the calculation covers a single layer of bricks or the full thickness required for your wall.
What Affects the Number of Bricks Needed?
Your brick quantity depends on the wall’s dimensions, brick size, mortar joints and construction method. A thicker wall may require additional layers of brickwork.
Decorative patterns, corners, piers and complex layouts can also affect quantities. Measure these separately where necessary and discuss any additional requirements with your contractor.
Frequently Asked Questions
How many bricks do I need per square metre?
The number depends on your brick dimensions, mortar joint thickness and wall construction. Enter the specifications for your chosen bricks rather than relying on a general estimate.
Should I subtract windows and doors?
Yes. Subtract their combined area from the total wall area. Additional brickwork around openings, including reveals and supporting details, may require a separate allowance.
How much wastage should I include?
The allowance depends on the brick type, cutting requirements, delivery conditions and design. Confirm an appropriate percentage with your supplier or bricklayer.
Can I use this calculator for a double-brick wall?
Check whether the calculator includes a wall thickness or brick-layer setting. If it estimates only one layer, you must account for the additional layer separately.
Does the brick estimate include mortar?
A brick quantity estimate does not automatically include mortar requirements. Use the Mortar Calculator to plan the mortar needed for your project.
Can this calculator tell me how to build a structural wall?
No. It estimates material quantities from the information entered. A qualified professional must determine structural requirements, foundations, reinforcement and suitable wall construction.
Explore our directory to find [building material suppliers](/suppliers/) and [contractors](/contractors/). Contact businesses directly to confirm brick specifications, prices, stock availability and delivery.
Calculator Disclaimer
Results are estimates for preliminary planning. Actual requirements may vary with brick dimensions, wall construction, site conditions, cuts and wastage. Confirm quantities and specifications with your supplier or contractor before purchasing materials.