Standard Drinks Calculator
Work out how many standard drinks are in your beer, wine or spirits based on volume and alcohol percentage, free in your browser.
Enter Values
Minimum 0
How to use this calculator
- Enter the volume in millilitres and the alcohol percentage (ABV).
- Read the standard drinks.
How it works
Grams of pure alcohol = volume × ABV% × 0.789 (alcohol's density). One AU/NZ standard drink is 10 g; a US standard drink is 14 g.
Worked example
375 mL at 4.8%. ≈ 1.4 AU standard drinks.
Common mistakes
- Assuming a can or glass equals one drink — strength and size vary a lot.
- Using this to judge whether it's safe to drive — it isn't a blood-alcohol reading.
Frequently asked questions
What counts as one standard drink?
It is a fixed amount of pure alcohol — 10 g in Australia, 14 g in the US — regardless of glass size, so stronger drinks count as more.
How do I work out the standard drinks in a bottle?
Multiply the volume in litres by the alcohol percentage by 0.789 (alcohol’s density), then divide by your country’s grams per standard drink.
Is this how much I can drink and drive?
No — it only counts the alcohol in a drink. It is not a blood-alcohol estimate or medical/legal advice.
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Cite this tool
Zerdly. (2026). Standard Drinks Calculator. Retrieved from https://www.zerdly.com/tools/standard-drinks-calculator/
Tip: Enter any known values to calculate the remaining results.
Designed to run locally in your browser. Tool inputs are not intentionally stored by Zerdly unless stated otherwise.