What Is a UK Alcohol Unit?
One UK alcohol unit equals 10 millilitres or 8 grams of pure alcohol. The number of units in a drink is calculated by multiplying the volume in millilitres by the ABV percentage and dividing by 1,000. A standard 175ml glass of 12 per cent wine contains 2.1 units. A pint of 4 per cent beer contains 2.3 units. A single 25ml measure of 40 per cent spirits contains 1 unit. These figures often surprise people, as a single large glass of wine or a strong craft beer can contain three or more units.
The 14-unit weekly limit recommended by the NHS applies equally to men and women. This equates to roughly six pints of average-strength beer, six 175ml glasses of average-strength wine or 14 single measures of spirits per week. The guidance also recommends having several drink-free days each week and avoiding binge drinking, defined as consuming more than six units in a single session.
Alcohol and Calories
Alcohol is calorie-dense, containing 7 calories per gram, almost as much as fat at 9 calories per gram. A pint of beer contains approximately 180 to 240 calories, a large glass of wine around 200 to 250 calories, and a gin and tonic about 120 to 170 calories depending on the mixer. Cocktails and alcopops can contain 200 to 400 or more calories each due to added sugars and fruit juices. Over a week, regular drinking can add a substantial number of empty calories to your diet, contributing to weight gain.
Choosing lower-calorie options can help if you want to drink moderately while managing your weight. Light beers, dry wines, spirits with low-calorie mixers and the growing range of low-alcohol and alcohol-free alternatives all provide options. Many UK pubs and bars now stock a good selection of alcohol-free beers and cocktails that have improved dramatically in quality in recent years.
Health Risks of Regular Drinking
Regular consumption above the recommended 14 units per week increases the risk of liver disease, heart disease, stroke, several types of cancer and mental health problems. The risks increase progressively with the amount consumed, and there is no completely safe level of alcohol consumption. If you are concerned about your drinking, the NHS provides free, confidential support through your GP, local alcohol services and the national Drinkline helpline.
Track your food spending alongside alcohol costs using our grocery budget calculator, or estimate meal costs with the meal cost calculator. For comprehensive NHS alcohol advice, visit NHS alcohol advice.
This calculator provides estimates for guidance only. Results are based on the figures you enter and typical UK averages. This is not professional, financial, medical or legal advice. Always consult a qualified professional for specific guidance.