For drinkers it is important to understand how to calculate a standard drink according to Australian standards in order to stay within drinking limits. Rather than counting glasses or bottles of alcohol drinkers can count standard drinks in order to keep track of how much alcohol they have consumed because it is a more reliable way of keeping track of alcohol already consumed.
 

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Counting glasses, bottles, or cans of alcohol can mislead drinkers because they contain different amounts of alcohol so it can be difficult to evaluate how much alcohol you have consumed and whether you are within legal limits.
 

A standard drink is a unit of measurement for measuring how much alcohol is contained in a drink. A standard drink by Australian standard is any drink containing 10 grams of alcohol. One standard drink always contains the same amount of alcohol regardless of the container size or alcohol type consumed. The number of standard drinks in an alcohol beverage is always shown on the label of the container.
 

How to calculate a standard drink by Oz standards:
 

Multiply the volume of the container in litres by the alcohol volume and multiply that by 0.789. Volume of container in litres X % alcohol by volume (ml/100ml) X 0.789*
 

=number of standard drinks