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Alcohol Units Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Alcohol units
2.50
- Grams of pure alcohol
- 19.7
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Alcohol Units Calculator
The Alcohol Units Calculator works out your alcohol units, along with 1 related figure in an instant. Enter drink volume, alcohol by volume (abv) and number of drinks and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the drink volume.
- Enter the alcohol by volume (abv).
- Enter the number of drinks.
- Read off your alcohol units, together with grams of pure alcohol — the calculator updates automatically, with no button to press.
Formula
The Alcohol Units Calculator uses the formula:
Alcohol units = Drink volume × Alcohol by volume (ABV) ÷ 1000 × Number of drinks
Worked example
For example, with drink volume of 500 ml, alcohol by volume (abv) of 5% and number of drinks of 1, the alcohol units is 2.50.
| Drink volume | 500 ml |
|---|---|
| Alcohol by volume (ABV) | 5% |
| Number of drinks | 1 |
| Alcohol units | 2.50 |
|---|---|
| Grams of pure alcohol | 19.7 |
Results are estimates for educational use, not professional advice.
Key terms explained
- Volume
- The amount of three-dimensional space an object occupies, measured in cubic units.
Frequently asked questions
Units equal volume in ml times ABV, divided by 1000. A 500 ml drink at 5% ABV is 2.5 units.
One UK unit is 10 ml (about 8 grams) of pure alcohol — roughly the amount in a small glass of wine or half a pint of regular-strength beer.
UK guidance suggests no more than 14 units a week, spread over several days with drink-free days. Limits vary by country, so check local advice.
Stronger drinks pack more alcohol into the same volume. A large glass of strong wine can be several units, far more than it appears.
The Alcohol Units Calculator uses the formula: Alcohol units = Drink volume × Alcohol by volume (ABV) ÷ 1000 × Number of drinks. For example, with drink volume of 500 ml, alcohol by volume (abv) of 5% and number of drinks of 1, the alcohol units is 2.50.
Enter the drink volume. Enter the alcohol by volume (abv). Enter the number of drinks. Read off your alcohol units, together with grams of pure alcohol — the calculator updates automatically, with no button to press.
Related guides
Alcohol Units Table: Alcohol units by Drink volume
Reference table of alcohol units for Alcohol Units across a range of drink volume values — exact, engine-computed figures you can read off at a glance.
How to Calculate Alcohol Units: Formula, Steps & Examples
Learn how to calculate Alcohol Units — the formula explained step by step, with worked examples and a free calculator to check your answer.