What Is a Standard Drink?
In Australia, a standard drink contains exactly 10 grams of pure alcohol. This is the benchmark used by health authorities, including the National Health and Medical Research Council (NHMRC), to measure alcohol consumption in a consistent and meaningful way.
The concept exists because not all drinks are equal. A pint of full-strength beer, a glass of wine, and a shot of spirits all contain different amounts of alcohol. Without a standardised unit, tracking how much you are actually consuming would be nearly impossible. Standard drinks give us a common language.
Here is the formula for calculating standard drinks:
Volume (litres) x Alcohol by Volume (%) x 0.789 = Standard Drinks
The 0.789 figure is the specific gravity of ethanol — the weight of one litre of pure alcohol in kilograms. Since a standard drink is 10 grams (0.01 kg), dividing the result by 0.01 gives you the number of standard drinks. In practice, the simplified formula above handles this automatically.
Understanding this calculation is useful, but you will not need to do maths every time you have a drink. Australian labelling laws require the number of standard drinks to be printed on most alcoholic beverages, and this guide will give you a practical sense of what a standard drink actually looks like in your glass.
Common Drinks and Their Standard Drink Equivalents
One of the most surprising things about standard drinks is how often our perception diverges from reality. What we think of as “one drink” is frequently more than one standard drink.
Beer
Beer is Australia’s most popular alcoholic beverage, but it comes in a wide range of strengths and serving sizes, which makes it one of the trickiest categories to navigate.
- Light beer (2.7% ABV): A 375 mL stubby contains approximately 0.8 standard drinks. A schooner (425 mL) is about 0.9.
- Mid-strength beer (3.5% ABV): A 375 mL stubby contains approximately 1.0 standard drink. A schooner is about 1.2.
- Full-strength beer (4.8% ABV): A 375 mL stubby contains approximately 1.4 standard drinks. A schooner is about 1.6.
- Craft beer (6-8% ABV): A 375 mL can of a 6.5% craft beer contains approximately 1.9 standard drinks. Some stronger craft beers can contain 2.5 or more standard drinks per can.
- Pint of full-strength (4.8% ABV, 570 mL): Approximately 2.1 standard drinks.
The key takeaway with beer is that a single full-strength pint is already more than two standard drinks. If you are having “just three pints” at the pub, you are actually consuming over six standard drinks — well above the NHMRC’s recommended maximum of four on any single occasion.
Craft beer deserves special attention. The trend toward higher-ABV brews means that a single tallboy (500 mL) of a strong IPA at 7.5% contains approximately 3.0 standard drinks. Many people drink these without realising they are consuming the equivalent of three standard drinks in one vessel.
Wine
Wine is another category where perception and reality frequently diverge.
- Standard glass of wine (150 mL at 13% ABV): Approximately 1.5 standard drinks.
- Large restaurant pour (200 mL at 13% ABV): Approximately 2.1 standard drinks.
- Bottle of wine (750 mL at 13% ABV): Approximately 7.7 standard drinks.
A critical detail is that many Australian wines — particularly reds like Shiraz and Cabernet — now commonly sit between 14% and 15.5% ABV. A 150 mL glass of 14.5% wine contains approximately 1.7 standard drinks. A bottle at that strength is about 8.6 standard drinks.
When people say they had “two glasses of wine with dinner,” they often mean two generously poured glasses. If each was 200 mL of 14% wine, that is approximately 4.4 standard drinks — already at the NHMRC’s recommended single-occasion limit.
Spirits
Spirits are relatively straightforward because they are typically served in measured quantities, but mixers and home pours can complicate things.
- Single nip of spirits (30 mL at 40% ABV): Approximately 0.9 standard drinks — very close to exactly one standard drink.
- Double shot (60 mL at 40% ABV): Approximately 1.9 standard drinks.
- Home pour: Research consistently shows that people free-pouring spirits at home serve 1.5 to 2 times the standard bar measure. If you are pouring your own gin and tonic without a jigger, you are very likely exceeding one standard drink per glass.
Cocktails
Cocktails are the most difficult category to track because they often contain multiple types of alcohol and vary enormously between venues.
- Standard Margarita: Approximately 1.5 to 2.0 standard drinks (tequila + triple sec).
- Espresso Martini: Approximately 1.5 to 2.5 standard drinks (vodka + coffee liqueur).
- Long Island Iced Tea: Approximately 3.5 to 5.0 standard drinks (vodka + gin + rum + tequila + triple sec).
- Negroni: Approximately 2.0 standard drinks (gin + vermouth + Campari).
The wide ranges reflect the reality that cocktail recipes differ between bars, and many establishments use generous pours to justify higher prices. A single Long Island Iced Tea can easily contain a full evening’s worth of standard drinks.
Ready-to-Drink (RTDs) and Pre-mixed Drinks
RTDs have become increasingly popular in Australia, particularly among younger drinkers. Their standard drink content varies widely.
- Standard RTD (275 mL at 5% ABV): Approximately 1.1 standard drinks.
- Full-size RTD (375 mL at 5% ABV): Approximately 1.5 standard drinks.
- Higher-strength RTD (375 mL at 8% ABV): Approximately 2.4 standard drinks.
- “Double” or “Extra Strength” RTD: Can contain 2.0 to 3.0 or more standard drinks per can.
Always check the label. The variation in this category is enormous, and the fruity flavours of many RTDs can mask the amount of alcohol present, making it easy to consume more than intended.
Cider and Seltzers
- Standard cider (330 mL at 4.5% ABV): Approximately 1.2 standard drinks.
- Strong cider (500 mL at 6% ABV): Approximately 2.4 standard drinks.
- Hard seltzer (330 mL at 4-5% ABV): Approximately 1.0 to 1.3 standard drinks.
How to Read Alcohol Labels in Australia
Australian law requires the following information on alcoholic beverage labels:
- Number of standard drinks: This must be displayed on the label and is the quickest way to know exactly what you are consuming. Look for text that reads something like “Contains 1.4 standard drinks.”
- Alcohol by Volume (ABV): Expressed as a percentage (e.g., 4.8% for full-strength beer, 13% for wine). This tells you the proportion of the liquid that is pure alcohol.
- Volume: The total volume of the container in millilitres or litres.
For packaged drinks, the standard drink count on the label is your most reliable reference. For drinks poured at a venue — particularly wine and cocktails — you will need to estimate based on the ABV and approximate serving size.
A practical habit is to glance at the standard drinks label before you open a drink. Over time, this builds an intuitive sense of how different products compare and helps you make informed choices.
Why Standard Drinks Matter
Tracking your consumption in standard drinks is not about being joyless. It is about having accurate information so you can make choices that align with your intentions.
Health Risk Assessment
The NHMRC guidelines for reducing health risks from alcohol are expressed in standard drinks:
- Guideline 1: No more than 10 standard drinks per week to reduce the lifetime risk of harm from alcohol-related disease or injury.
- Guideline 2: No more than 4 standard drinks on any single occasion to reduce the risk of alcohol-related injury on that occasion.
Without understanding standard drinks, these guidelines are meaningless. If you think a pint of full-strength beer is “one drink” (it is actually 2.1 standard drinks), you might believe you are well within the guidelines when you are actually exceeding them.
Knowing Your Limits
Everyone’s response to alcohol is different, influenced by body weight, sex, genetics, food intake, hydration, and tolerance. But standard drinks give you a consistent unit to track against your own experience. If you know that more than five standard drinks reliably gives you a severe hangover, you can use that knowledge — but only if you are counting accurately.
Legal Awareness
Blood alcohol concentration (BAC) is directly related to the number of standard drinks consumed over a given period. While individual factors like body weight and metabolism affect the exact relationship, a rough guide is that one standard drink raises BAC by approximately 0.02% in an average-weight adult. The legal driving limit in all Australian states and territories is 0.05% for fully licenced drivers (0.00% for learner and provisional drivers).
Understanding standard drinks helps you make responsible decisions about driving, though the safest approach is always to separate drinking from driving entirely.
How Standard Drinks Vary by Country
Australia’s standard drink (10 grams of alcohol) is not universal. Different countries define their standard unit differently, which can cause confusion when reading international health advice.
| Country | Standard Drink (grams of alcohol) |
|---|---|
| Australia | 10 g |
| New Zealand | 10 g |
| United Kingdom | 8 g (one “unit”) |
| United States | 14 g |
| Canada | 13.6 g |
| Japan | 19.75 g |
| Austria | 20 g |
This means that when you read that US guidelines recommend “up to two drinks per day for men,” those are 14-gram drinks — equivalent to about 2.8 Australian standard drinks. International comparisons require careful conversion.
Practical Tips for Counting Standard Drinks
Turning knowledge into practice is the real challenge. Here are strategies that work.
1. Check the Label Before You Drink
Make it a habit. It takes two seconds and gives you the information you need upfront. Over time, you will build a mental library of how many standard drinks your favourite beverages contain.
2. Use a Measuring Jigger at Home
If you pour spirits at home, a simple 30 mL jigger keeps your serves consistent and honest. Research shows that even bartenders overestimate their pours without measuring equipment. The rest of us are no better.
3. Track as You Go
Various smartphone apps allow you to log drinks as you consume them. This is particularly useful at social events where it is easy to lose count. Even a simple note on your phone works.
4. Be Cautious with Top-ups
One of the biggest tracking pitfalls is having your glass topped up before it is empty. This is especially common with wine at dinner parties. You end up with no idea how many glasses you have actually consumed. Finish your drink before accepting a refill, so each glass is a countable unit.
5. Know Your Venue’s Serving Sizes
Pubs and restaurants vary in their pour sizes. Some serve generous 200 mL glasses of wine; others stick to a standard 150 mL. If you are unsure, it is perfectly reasonable to ask.
6. Account for Cocktails
If you are ordering cocktails, ask the bartender how many shots are in each drink. Most will tell you readily. Two shots of spirits means approximately two standard drinks before accounting for any liqueurs in the mix.
7. Apply the NHMRC Framework
Use the guidelines as a practical framework: no more than four standard drinks on any single occasion, and no more than ten across the week. Having a specific, measurable target makes it far easier to moderate than a vague intention to “not drink too much.”
Beyond the Numbers
Understanding standard drinks is a tool, not a destination. The goal is to give yourself accurate information so that your choices about drinking are genuinely informed. Many Australians are surprised to discover that their “moderate” drinking is actually well above the recommended guidelines — not because they are reckless, but because the gap between perceived and actual consumption is so wide.
Closing that gap does not require perfection. Even a rough awareness of standard drinks puts you in a significantly better position than having no awareness at all.
If you are concerned about your alcohol consumption or would like support in making changes, the following services are available:
- Alcohol and Drug Information Service (ADIS): 1800 250 015 — free, confidential advice
- Your GP: A non-judgemental conversation about drinking habits and health
- DrinkWise Australia: drinkwise.org.au — tools and resources for understanding your drinking
Health Disclaimer: This article is for general informational purposes only and does not constitute medical advice. It is not a substitute for professional medical diagnosis, treatment, or care. The standard drink calculations provided are approximations and may vary based on specific products and serving conditions. If you have concerns about your alcohol consumption, please consult a qualified healthcare professional. For free and confidential advice, contact the Alcohol and Drug Information Service on 1800 250 015.