Mortar bag coverage

MEASURE FIRST

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

Bags = round up [wall area × (1 + allowance) ÷ product coverage].

Assumptions & exclusions

Coverage depends on unit size, joint thickness, bond and product. Enter a supplier-confirmed rate; this calculator does not infer mortar recipes or structural suitability.

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.