Brick & block quantities
Estimate units from wall area, unit dimensions and mortar joints.
Quantity / scenario planning · Reviewed 7 October 2026Your inputs
Check all starting values against your project and product. Enter your own prices; keep costs on the same GST basis.
How to prepare your inputs
Measure each wall face and deduct genuine openings. Check actual unit dimensions, bond, leaves and joint specification.
How this calculation works
Units = net face area × leaves ÷ [(unit length + joint) × (unit height + joint) in metres], then add allowance and round up.
One square metre with 230 × 76 mm bricks and 10 mm joints uses about 48.45 units before allowance.
Assumptions & exclusions
Examples are editable geometry, not a specification. Excludes special shapes, corners, lintels, ties, reinforcement, core fill and mortar. Measure openings and check actual bond/coursing with a bricklayer.
Your next step
Ask your bricklayer to confirm special units, coursing, ties, lintels, core fill and mortar before ordering.
Further reading
- Cement Australia calculators
These resources provide background information. Confirm current product specifications and project requirements with your supplier or trade professional.
What if my shape or product is different?
Use dimensions and product data that match the stated method. For complex work, calculate separate sections or obtain a project-specific take-off. Do not apply simple geometry to structural or compliance decisions.
Why are quantities rounded up?
Whole bags, packs, sheets or cartridges round up to purchasable units. Decimal area or volume results are planning figures; confirm order increments with the supplier.
Are my entries saved?
No. Entries remain in the current browser page and clear on reload. Printing can save your results and inputs as a PDF on your device.
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