Alcohol Units Calculator - UK Units and US Standard Drinks per Week
Alcohol Units Calculator
How much alcohol you drink in a typical week
Common Drinks Built In
Pints, cans, glasses of wine and shots fill in their size and strength for you.
UK and US Measures
See UK units (8 g) and US standard drinks (14 g) side by side.
Hidden Calories
Alcohol has about 7 kcal per gram, before any sugar in the drink.
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Counting Units
A UK unit is 10 mL of pure alcohol. Multiply the volume in millilitres by the ABV and divide by 1,000: a pint (568 mL) of 4% beer is 2.3 units and a 175 mL glass of 12% wine is 2.1 units. A US standard drink contains 14 g of alcohol, about 1.8 UK units. Example: four pints of 4% beer and three medium glasses of 12% wine a week add up to 15.4 units, slightly over the guideline.
The UK Chief Medical Officers advise not regularly drinking more than 14 units a week, spread over three or more days with some drink-free days. That is a low-risk level, not a safe one: health risks rise with any amount, and many health bodies now say that drinking less is better. Standard drink sizes differ between countries, so check local guidance.
Key Takeaways
- Volume × ABV: mL × ABV ÷ 1000 gives UK units.
- 14 units a week: The UK low-risk guideline for men and women.
- Strength matters: A strong craft beer can have twice the units of a standard lager.