Calculate UK alcohol units for any drink and check your weekly intake against NHS guidelines
This calculator is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.
Understanding how many units of alcohol you consume is essential for monitoring your health and staying within safe drinking guidelines. In the UK, alcohol is measured in units -- a standardised measure that accounts for both the volume of a drink and its alcohol by volume (ABV) percentage. One unit equals 10ml (or 8g) of pure alcohol, which is roughly the amount an average adult can process in one hour. The NHS recommends that both men and women should not regularly drink more than 14 units of alcohol per week. This guideline, established by the UK Chief Medical Officers in 2016, was based on evidence that the risk of developing a range of health conditions, including cancer, increases with any level of regular alcohol consumption. There is no "safe" level of drinking, but keeping within 14 units per week keeps health risks low. This calculator helps you determine how many UK alcohol units are in your drinks, estimate your weekly intake, and compare it against the NHS guideline. It also calculates the calorie content of your drinks, which is often overlooked -- alcohol contains 7 calories per gram, making it nearly as calorific as pure fat. Understanding both the unit and calorie content of your drinking habits can help you make informed decisions about your health.
To calculate your alcohol units: 1. Enter the volume of your drink in millilitres. Common serving sizes: a pint of beer is 568ml, a standard glass of wine is 175ml (large glass is 250ml), a single measure of spirits is 25ml, and a double is 50ml. Check your glass or bottle for the exact volume. 2. Enter the ABV (alcohol by volume) percentage. This is printed on every bottle and can label in the UK. Common ABV values: beer 3.5-5.5%, wine 11-14%, spirits 37.5-40%, cider 4-8%, alcopops 4-5.5%. 3. Enter the number of drinks if you had more than one of the same type. 4. Optionally enter how many of this drink you have per week. This enables the weekly risk assessment, comparing your intake against the NHS 14-unit guideline. 5. Review your results. The calculator shows units per drink, total units, weekly units (if applicable), your NHS risk level, calories per drink, weekly calories from alcohol, and how many drinks per week of this type would keep you within the NHS guideline.
UK alcohol units are calculated using a simple formula: Units = (Volume in ml x ABV%) / 1000 For example, a pint of beer (568ml at 4.5% ABV): 568 x 4.5 / 1000 = 2.6 units. A standard glass of wine (175ml at 12.5% ABV): 175 x 12.5 / 1000 = 2.2 units. A double measure of spirits (50ml at 40% ABV): 50 x 40 / 1000 = 2.0 units. Weekly units are calculated by multiplying units per drink by the number of that drink consumed per week. Risk categories based on NHS guidelines: Within guidelines (14 units or fewer per week), Above guidelines (14-35 units), High risk (35-50 units), Very high risk (more than 50 units). Calorie content is estimated using the relationship between units and pure alcohol: 1 unit = 8 grams of alcohol, and alcohol contains approximately 7 kilocalories per gram. So each unit contributes roughly 56 kilocalories. This does not include calories from sugar, carbohydrates, or other ingredients in the drink, so actual calorie content will typically be higher.
The 14-unit weekly guideline applies equally to men and women. If you do drink as much as 14 units per week, the NHS recommends spreading your drinking over three or more days rather than concentrating it in one or two sessions. Having several drink-free days per week is also recommended. Regularly exceeding the guidelines increases your risk of a range of health conditions, including liver disease, heart disease, stroke, pancreatitis, and several types of cancer (including mouth, throat, breast, and bowel cancer). The risk increases progressively with the amount consumed. If you are concerned about your drinking, you can speak to your GP in confidence or contact Drinkline (the national alcohol helpline) on 0300 123 1110. The NHS also provides an online alcohol self-assessment tool at nhs.uk/oneyou/drinking. Reference: NHS Alcohol units guidance (nhs.uk/live-well/alcohol-advice/calculating-alcohol-units), UK Chief Medical Officers' Low Risk Drinking Guidelines (2016), Drinkaware UK (drinkaware.co.uk).