If a customer pays by quantity, measurement is part of the deal. The Act is the backbone for legal units of measurement, measuring instruments used for trade, packed articles and enforcement. It is especially relevant where small quantity errors repeat across many sales.
Main laws
Commonwealth Act
National Measurement Act 1960 (Cth)
The National Measurement Act affects legal units, trade measuring instruments, packed goods and quantity claims.
In forceCommonwealthPlain-English guide5 practical checks
Plain-English explainers, not legal advice. Check the linked official source before you rely on a specific section, and get advice for your situation.
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Quick read
- Measurement law matters whenever customers pay based on quantity.
- For small businesses, it affects scales, packed-article labels, short-measure risk, fuel or liquid measures, trade contracts and whether the business can prove quantities are...
Likely relevant if
- Retailers selling goods by weight, volume, length, area or count
- Food, beverage, cosmetics, produce, fuel and hardware businesses
- Businesses using scales, flowmeters, weighbridges or packed-article labels
Check first
- Use legal units of measurement in trade documents, labels and contracts.
- Use suitable and verified measuring instruments where the rules require it.
- Check packed goods for accurate net quantity and compliant labelling.
Start here
Key points
- Use Australian legal units of measurement in trade documents and labels.
- Check that scales, meters or weighbridges used for trade are suitable and verified where required.
- Review packed-article labels for net quantity and short-measure risk.
- Keep servicing, calibration, verification and supplier records.
High-risk places
Risk points
- Packing rooms where fill weight varies between batches.
- Retail counters using scales for meat, produce, bulk foods or jewellery.
- Fuel, liquid, gas or chemical dispensing points.
- Supplier invoices where quantity drives price and margin.
Plain-English glossary
- Legal unit of measurement
- A unit recognised under Australian measurement law for trade and legal purposes.
- Measuring instrument used for trade
- An instrument used to measure quantity where that measurement affects a transaction.
- Verification
- A process for confirming that a measuring instrument meets legal requirements for trade use.
Common questions
Does this only apply to big manufacturers?
No. It can matter for small retailers, food producers, market stalls, fuel sellers, jewellers, hardware suppliers and any business selling by measurement.
What is the first practical check?
Find every point where price depends on weight, volume, length, area or count, then check labels, instruments and records around those points.
Is this the same as consumer law?
It overlaps with consumer law, but measurement law has its own units, instruments, verification and inspector framework.