Alcohol Unit Calculator

Enter your drink type, volume, and ABV (alcohol by volume %) to find out exactly how many alcohol units you consumed. You can also enter the number of drinks to see your total intake compared to recommended weekly limits. Also try the Serum Osmolality Calculator.

Disclaimer: This tool is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making any health-related decisions.

Select a common drink to auto-fill volume and ABV, or choose Custom to enter your own values.

mL

Enter the size of your drink in millilitres. 1 pint ≈ 568 mL, 1 fl oz ≈ 29.6 mL.

%

ABV (Alcohol By Volume) is printed on most drink labels. Enter just the number, e.g. 5 for 5%.

How many of this drink did you have?

Choose which health guideline to compare your intake against.

Results

Total Alcohol Units

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Units Per Single Drink

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US Standard Drinks (14g alcohol each)

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Weekly Guideline Limit

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% of Weekly Limit Consumed

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Pure Alcohol Consumed

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Approximate Calories

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Frequently Asked Questions

What is one unit of alcohol?

One unit of alcohol equals 10 mL (or 8 g) of pure alcohol. This is roughly the amount an average adult can process in one hour. Units are calculated using the formula: Volume (mL) × ABV (%) ÷ 1000. See also our calculate Nicotine Clearance.

How is an alcohol unit different from a US standard drink?

A UK alcohol unit contains 8 g of pure alcohol, while a US standard drink contains 14 g of pure alcohol — nearly twice as much. This means one US standard drink equals approximately 1.75 UK units. This calculator shows both so you can compare against guidelines from either country.

What are the recommended weekly alcohol limits?

In the UK, the NHS advises both men and women not to drink more than 14 units per week, spread over at least 3 days, with some alcohol-free days. In the USA, the NIAAA recommends no more than 14 standard drinks per week for men and 7 for women.

How many units are in a pint of beer?

A pint (568 mL) of standard 4% lager contains approximately 2.3 units. A stronger 5% pint contains around 2.8 units. Higher-strength craft beers at 6–7% ABV can contain 3.4–4 units per pint. You might also find our use the Blood Type Compatibility Calculator useful.

How many units are in a glass of wine?

A small 125 mL glass of 12% wine contains 1.5 units. A medium 175 mL glass has 2.1 units, and a large 250 mL glass contains 3 units. A standard 750 mL bottle of 12% wine contains 9 units in total.

How do I convert proof to ABV percentage?

In the USA, proof is simply double the ABV percentage. So 80-proof spirits = 40% ABV, and 100-proof spirits = 50% ABV. In the UK, the proof system is no longer used — just look for the ABV % on the label.

How many calories are in alcohol?

Alcohol contains approximately 7 calories (kcal) per gram of pure alcohol. This calculator estimates calories from alcohol alone — mixers, sugar, and other drink ingredients add additional calories not included here.

How long does it take to process one unit of alcohol?

On average, the liver processes roughly one UK unit (8 g of pure alcohol) per hour. However, this varies based on body weight, sex, age, food intake, and individual metabolism. Nothing speeds up this process — not coffee, water, or fresh air.