Donaldson R F Alcohol Units Calculator
Find out how many UK units are in your drinks and add up a typical week. Nothing you enter leaves your device.
For information only — not medical advice. This tool only does the arithmetic and compares it with the UK Chief Medical Officers’ low-risk guideline. It cannot tell you whether your drinking is safe for you. If you are pregnant or trying to conceive the advice is not to drink at all. If you are worried about your drinking, or someone else’s, talk to your GP or contact Drinkaware or NHS services.
What is a unit?
One UK unit is 10 ml (8 g) of pure alcohol. You can work it out as units = volume in ml × ABV% ÷ 1000: a pint (568 ml) of 4% beer is 2.3 units and a 175 ml glass of 12% wine is 2.1 units. Bars pour different sizes and drinks vary in strength, so check the label.
The UK guideline for both men and women is to drink no more than 14 units a week, spread over three or more days, with several alcohol-free days. That is a limit for lower risk, not a safe amount. Alcohol contains about 7 kcal per gram — roughly 55 kcal per unit before any mixers.