Alcohol Units Calculator
Calculate alcohol units in drinks from volume and ABV. Convert across UK, US, Indian, Australian, and European standards with weekly limit check and charts.
About This Calculator
The Alcohol Units Calculator helps you track how many units of alcohol you are consuming. One UK unit equals 10ml (8g) of pure ethyl alcohol, a standard used since 1987 by the UK National Health Service (NHS) to provide clear drinking guidelines. This calculator is useful for anyone who wants to monitor their alcohol intake, compare serving sizes across different beverages, and understand their drinking habits relative to official health recommendations.
The calculation is based on the standard formula: (ABV × volume in ml) / 1000 = UK alcohol units. This works for any alcoholic beverage — beer, wine, spirits, cider, cocktails, or liqueurs. The result shows the total number of UK units, which is then converted to your selected country's standard unit definition. The density of pure ethanol (0.789 g/ml) is used to calculate the mass of pure alcohol consumed. The calculator also compares your intake against the UK NHS weekly guideline of 14 units, the US CDC recommendation of up to 14 standard drinks per week for men, and Australian guidelines of up to 10 standard drinks per week for women and 15 for men.
Regional Notes
India: India follows the UK unit definition (8g of pure alcohol per unit). The recommended limit is similar to UK guidelines. The legal drinking age varies by state from 18 to 25 years.
United States: The US uses "standard drinks" where one standard drink contains 14g (0.6 fl oz) of pure alcohol. The Dietary Guidelines for Americans recommend up to 2 standard drinks per day for men and up to 1 per day for women.
United Kingdom: The NHS advises both men and women not to regularly drink more than 14 units per week, spread over 3 or more days. One unit equals 8g of pure alcohol.
Frequently Asked Questions
How many units are in a standard drink?
A single UK unit of alcohol is 10ml (8g) of pure alcohol. A standard 25ml shot of 40% spirit is 1 unit, a 175ml glass of 12% wine is 2.1 units, and a 568ml pint of 5% beer is 2.8 units. Use the preset buttons in the calculator for quick estimates.
What is the recommended weekly alcohol limit?
The UK NHS recommends both men and women should not drink more than 14 units of alcohol per week, spread across at least 3 days. US guidelines suggest a maximum of 14 standard drinks per week for men and 7 for women. In Australia the limit is 10 standard drinks per week for women and 15 for men.
How do alcohol units differ between countries?
Different countries define a standard alcohol unit differently. The UK and India define 1 unit as 8g of pure alcohol. The US defines a standard drink as 14g. Australia uses 10g. European countries vary from 8g in Iceland to 20g in Austria. Our calculator converts between all these standards.
How accurate is this alcohol units calculator?
This calculator uses the standard formula: (ABV × volume in ml) / 1000 = UK units per drink. Results are accurate for the values you enter. Actual alcohol content may vary slightly between brands and batches. Always check the label on your drink for precise ABV.
Can I use this calculator for home brewing?
Yes. Enter the volume of your home-brewed beverage and its measured ABV. The calculator will give you the total alcohol units. For help determining ABV of homemade drinks, use our Alcohol by Volume (ABV) Calculator which converts original and final gravity readings.
How many units are in a bottle of wine?
A standard 750ml bottle of wine at 12% ABV contains approximately 9 UK units. At 13.5% ABV it would be about 10.1 units. A 14% ABV bottle contains around 10.5 units. This exceeds the weekly guideline of 14 units if consumed alone.
What does one unit of alcohol mean for my health?
The average healthy adult body can process about 1 unit of alcohol per hour. Regularly drinking above recommended limits increases risks of liver disease, certain cancers, high blood pressure, and mental health issues. Always drink responsibly and consult a healthcare professional for personalized advice.
How do I calculate alcohol units for cocktails?
For cocktails, add up the volume and ABV of each spirit and mixer separately. The formula is: (total ABV × total volume) / 1000. For example, a cocktail with 50ml of 40% vodka and 150ml of mixer at 0% ABV has ABV of (50×40 + 150×0)/(200) = 10%, giving 2 UK units.