Free alcohol units calculator
How many alcohol units are in your drink?
Enter the serving size and ABV to calculate UK alcohol units, pure alcohol and U.S. standard-drink equivalents.
What the result means
A direct answer,
with the math visible.
An alcohol unit is a UK measure equal to 10 millilitres or about 8 grams of pure alcohol. Units make drinks of different sizes and strengths easier to compare.
One UK unit is 10 ml (about 8 g) of pure alcohol. The number of units changes with both the pour size and the drink’s strength.
Measurements are approximate because actual serving sizes and labelled ABV can vary. Use these results for education and personal tracking, not medical or legal decisions.
Worked examples
- 330 ml beer at 5% ABV = 1.65 units
- 175 ml wine at 12% ABV = 2.1 units
- 25 ml spirit at 40% ABV = 1 unit
Common questions
Before you use the result.
Does one glass always equal one unit?
No. The result depends on the actual serving size and ABV. A large wine pour or strong beer can contain several units.
Are UK units the same as U.S. standard drinks?
No. One UK unit contains about 8 grams of pure alcohol, while one U.S. standard drink contains about 14 grams.
Keep the full picture
One calculation helps. A pattern helps more.
Track drinks, units, dry days, cost and estimated BAC over time with Alcohol Tracker°.