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How many units is that?
Pick a drink or enter its size and strength. See how much pure alcohol it contains in UK units, US standard drinks and grams.
Updated September 27, 2026
Alcohol unit and standard drink calculator
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Units and standard drinks measure pure alcohol. They are not a safe limit. For guidance where you live, see the official sources below.
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How units and standard drinks work
Both measure pure alcohol, not the number of glasses. One UK unit is 10 ml, or 8 grams, of pure alcohol. A US standard drink is 14 grams. That’s why a large glass of strong wine can be three units or more.
The formula: volume in ml × strength (% ABV) ÷ 1,000 = UK units.
What the guidelines say
The UK Chief Medical Officers advise not drinking more than 14 units a week on a regular basis, spread over three or more days, with several alcohol-free days a week. In the US, the 2025–2030 Dietary Guidelines no longer give daily limits; they advise drinking less for better overall health. The Dutch Health Council said in 2026 that there is no safe lower limit. Guidance differs by country, so check the official source for where you live.
Use it for a real week
Add up a typical week, including weekends. If the total surprises you, try a weekly plan with a few alcohol-free days. It’s easier to change what you can see.
Questions and answers
How many units are in a pint?
A pint of 4% lager is about 2.3 units. A pint of 5.2% beer is about 3 units.
How many units are in a glass of wine?
A 175 ml glass of 13% wine is about 2.3 units. A 250 ml glass is about 3.3 units.
Is this medical advice?
No. It measures alcohol content. If you’re worried about your drinking, talk to a doctor or a local support service.
