Alcohol Units Calculator UK
Calculate units in any drink using the UK formula. Track your weekly total against the NHS 14-unit safe limit. Use quick presets or enter custom drinks.
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Quick Presets
What is one UK alcohol unit? One unit = 10ml (8g) of pure alcohol. A standard pint of 4% beer = 2.3 units. A 175ml glass of 13% wine = 2.3 units. A single 25ml spirit (40%) = 1 unit. The NHS recommends a maximum of 14 units per week for both men and women, spread over 3 or more days.
Complete UK Alcohol Units Reference Table
Use this table to quickly look up how many units are in common UK drinks. All figures are calculated using the standard formula: Units = (ABV% x Volume in ml) / 1,000.
| Drink | Volume | ABV | Units | % of Weekly Limit | Calories (approx) |
|---|---|---|---|---|---|
| Pint of lager | 568ml | 4% | 2.3 | 16% | 182 |
| Pint of strong lager | 568ml | 5.2% | 3.0 | 21% | 227 |
| Pint of premium lager | 568ml | 5% | 2.8 | 20% | 215 |
| Pint of craft IPA | 568ml | 6.5% | 3.7 | 26% | 284 |
| Small glass of wine | 125ml | 13% | 1.6 | 12% | 99 |
| Medium glass of wine | 175ml | 13% | 2.3 | 16% | 139 |
| Large glass of wine | 250ml | 13% | 3.3 | 23% | 198 |
| Bottle of wine | 750ml | 13% | 9.8 | 70% | 594 |
| Single spirit | 25ml | 40% | 1.0 | 7% | 55 |
| Double spirit | 50ml | 40% | 2.0 | 14% | 110 |
| Can of beer | 330ml | 5% | 1.7 | 12% | 125 |
| Can of cider | 440ml | 4.5% | 2.0 | 14% | 189 |
| Pint of cider | 568ml | 4.5% | 2.6 | 18% | 244 |
| Prosecco glass | 125ml | 11% | 1.4 | 10% | 80 |
| Bottle of prosecco | 750ml | 11% | 8.3 | 59% | 480 |
| Standard cocktail | 200ml | 15% | 3.0 | 21% | 200 |
| Alcopop bottle | 275ml | 4% | 1.1 | 8% | 170 |
Calorie values are approximate and vary by brand. Based on NHS and Drinkaware data.
NHS Health Risks by Alcohol Consumption Level
The NHS and UK Chief Medical Officers provide clear guidance on the health effects of different levels of alcohol consumption. There is no completely safe level of drinking, but the risks increase significantly above 14 units per week.
| Weekly Units | Risk Level | Health Effects |
|---|---|---|
| 0 units | No risk | No alcohol-related health risk. Lowest risk of all causes of death. |
| 1-14 units | Low risk | Within NHS guidelines. Spread over 3+ days with alcohol-free days. Equivalent to 6 pints of average beer or 6 medium glasses of wine per week. |
| 15-35 units | Increasing risk | Higher risk of liver disease, high blood pressure, stroke, and certain cancers (mouth, throat, breast). Risk of alcohol dependency begins to rise. |
| 36-50 units | Higher risk | Significantly increased risk of liver cirrhosis, pancreatitis, heart disease, depression, and anxiety. May experience alcohol tolerance and early dependency symptoms. |
| 50+ units | Highest risk | Severe risk of liver failure, multiple cancers, cardiovascular events, brain damage, and alcohol dependency. NHS strongly recommends seeking medical support. |
The NHS recommends several alcohol-free days per week. Binge drinking (8+ units for men, 6+ units for women in a single session) is particularly harmful even if total weekly units are within guidelines. If you are concerned about your drinking, contact your GP or call Drinkline on 0300 123 1110.
Understanding UK Alcohol Units
The alcohol unit system is a uniquely British measurement tool introduced in 1987 to help people understand how much alcohol they are actually consuming. One unit of alcohol equals 10ml or 8 grams of pure ethanol — regardless of what drink it comes from. This standardised system allows you to compare alcoholic drinks of different strengths and volumes fairly.
The formula is straightforward: Units = (ABV% × Volume in ml) ÷ 1000. So a 250ml glass of wine at 13% ABV contains: (13 × 250) ÷ 1000 = 3.25 units. This simple calculation is the basis of the UK's entire public health alcohol guidance.
NHS Recommended Weekly Limits
The Chief Medical Officers for the UK updated alcohol guidelines in 2016. The current recommendation is that both men and women should not regularly drink more than 14 units of alcohol per week. This represents a change from previous guidance that allowed men a higher limit — new evidence showed alcohol's cancer risk applies equally to both sexes.
Crucially, the NHS advises that these 14 units should be spread across three or more days. "Saving up" your weekly allowance and drinking it all in one or two sessions — known as binge drinking — significantly increases health risks even if the total weekly units are below 14.
What Does 14 Units Actually Look Like?
Many people underestimate how quickly units accumulate. Here are common drinking scenarios and their unit counts:
- A Friday evening: 3 pints of 5% beer = 8.5 units
- Saturday night out: 4 glasses of 13% wine (175ml each) = 9.1 units
- Two social occasions like the above = 17.6 units — already 26% over the weekly limit
This demonstrates why tracking units is valuable — social drinking can quickly exceed safe levels without feeling excessive.
Common Drink Units Reference Table
| Drink | Size | ABV | Units | % of Weekly Limit |
|---|---|---|---|---|
| Beer / Lager (pint) | 568ml | 4% | 2.3 | 16% |
| Strong Beer (pint) | 568ml | 5% | 2.8 | 20% |
| Wine (small glass) | 125ml | 13% | 1.6 | 11% |
| Wine (medium glass) | 175ml | 13% | 2.3 | 16% |
| Wine (large glass) | 250ml | 13% | 3.25 | 23% |
| Bottle of wine | 750ml | 13% | 9.75 | 70% |
| Single spirit | 25ml | 40% | 1.0 | 7% |
| Double spirit | 50ml | 40% | 2.0 | 14% |
| Prosecco | 125ml | 11% | 1.4 | 10% |
| Champagne | 125ml | 12% | 1.5 | 11% |
| Alcopop | 275ml | 4% | 1.1 | 8% |
| Craft IPA (pint) | 568ml | 6.5% | 3.7 | 26% |
Health Risks of Exceeding the Weekly Limit
The NHS states there is no completely safe level of alcohol consumption. However, drinking above 14 units per week on a regular basis increases the risk of a wide range of serious health conditions. These include liver cirrhosis and liver cancer, breast cancer (alcohol is a known carcinogen for breast tissue), bowel cancer, mouth and throat cancers, heart disease and stroke, high blood pressure, and pancreatitis.
Mental health is also significantly affected. Regular heavy drinking is linked to anxiety, depression, sleep disorders, and dependency. Alcohol use disorder affects over 600,000 people in England alone, according to NHS data. Alcohol is involved in around 1 in 5 emergency hospital admissions in the UK.
Understanding Alcohol Metabolism
Your liver can process approximately 1 unit of alcohol per hour, though this varies between individuals based on age, sex, body weight, liver health, and whether you have eaten. Women generally metabolise alcohol more slowly than men due to lower body water content and different enzyme levels. There is no way to speed up alcohol metabolism — time is the only solution.
Blood Alcohol Concentration (BAC) determines how alcohol affects you. In the UK, the drink-drive limit is 80mg of alcohol per 100ml of blood in England and Wales (35 micrograms per 100ml of breath). Scotland has a lower limit of 50mg per 100ml of blood. Even one unit can impair reaction time and judgement — never drink and drive.
Tips for Reducing Alcohol Intake
If you want to reduce your weekly units, practical strategies include: choosing lower-ABV drinks, alternating alcoholic drinks with water, setting a units budget before going out, having alcohol-free days each week (the NHS recommends this), opting for smaller measures, and using an alcohol unit tracker like this calculator to stay aware of your consumption.
If you are concerned about your drinking, the NHS advises speaking to your GP. Free resources include Drinkline (0300 123 1110), Alcoholics Anonymous, and the FRANK alcohol information service. These services provide confidential support without judgement.
How the Alcohol Units Calculator Works
This calculator uses established health formulas and UK-specific reference ranges to provide useful estimates. While online calculators are helpful for general guidance, they should not replace professional medical advice. Always consult your GP or a qualified health professional for personalised health assessments.
UK health guidelines are published by the NHS, Public Health England, and NICE (National Institute for Health and Care Excellence). This tool aligns with these official guidelines where applicable, providing results relevant to the UK population.
Key Information
The NHS recommends at least 150 minutes of moderate-intensity activity per week for adults, or 75 minutes of vigorous activity. A healthy BMI range for adults is 18.5 to 24.9. The UK Chief Medical Officers advise that both men and women should not regularly drink more than 14 units of alcohol per week. Calorie guidance suggests approximately 2,000 kcal per day for women and 2,500 kcal for men, though individual needs vary.
Example Calculation
A 30-year-old female who is 165cm tall and weighs 65kg would have a BMI of 23.9, which falls within the healthy range. Her estimated Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation would be approximately 1,387 kcal per day, rising to around 1,910 kcal with moderate activity.
Source: Based on NHS and Public Health England guidelines. Last updated March 2026.
Frequently Asked Questions
Content reviewed by Mustafa Bilgic (MB) | Last updated: March 2026 | Sources: NHS UK, Chief Medical Officers UK, Drinkaware