UK alcohol units calculator
Add what you drink in a typical week. See units, how you compare to the 14-unit UK guideline, and calories from alcohol.
Weekly total
0.0 units
≈ 0 kcal from alcohol
vs 14-unit UK guideline
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Add some drinks to see your total.
All maths runs in your browser.
Common questions
What is a UK unit of alcohol?▾
One UK unit is 10ml (8g) of pure ethanol. The formula is: (ABV% × volume in ml) ÷ 1000. A pint of 4% beer is about 2.3 units. A 175ml glass of 12% wine is about 2.1 units.
How many units a week is safe?▾
The UK Chief Medical Officer's guidance is under 14 units a week for both men and women, spread over three or more days, with several drink-free days. There is no completely safe level of alcohol.
How many calories in alcohol?▾
Alcohol has 7 kcal per gram of pure ethanol — nearly as calorie-dense as fat (9 kcal/g). A single UK unit contains around 56 kcal from alcohol alone, before mixers or sugars. A large glass of wine can hit 200+ kcal.
Is this calculator accurate?▾
Unit maths is exact — it uses the official UK formula. Calorie estimates are for the alcohol content only; sugars and mixers can add significantly more.
Related
If you drink heavily every day, don't stop suddenly — supervised detox is safer.