Alcohol Units Calculator
Enter what you drank and find out the total alcohol units, calories, and roughly how long until you're sober. Useful for tracking a night out or understanding what those drinks actually add up to.
You've had 2.3 units, equivalent to 1 pint of regular beer. 11.7 units left within the weekly limit.
How to use
- Pick your drink from the list. The standard volume fills in automatically.
- Adjust the volume if your pour was bigger or smaller than standard.
- Set the quantity, then add rows for any other drinks.
- Add your weight for a rough blood alcohol estimate and time to sober up.
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A unit of alcohol in the UK and India-based guidelines is 10ml of pure ethanol. A pint of 5% beer contains about 2.3 units; a large glass of 14% wine around 3 units; a 25ml shot of 40% spirits exactly 1 unit. The calculator works it out from drink volume and ABV (alcohol by volume percentage) so you do not have to guess.
The NHS guidelines suggest staying under 14 units per week spread across several days. Practically, most people do not think in units while drinking - they think in glasses and bottles. Running a tally through this tool before or during a session gives you a concrete number rather than a vague sense of whether you have had too much.
Frequently Asked Questions
How is an alcohol unit calculated?
Units = (volume in ml x ABV%) / 1000. A 330ml bottle of 5% beer = (330 x 5) / 1000 = 1.65 units. The calculator handles this automatically when you enter drink size and ABV.
Why do the same drinks have different unit counts across countries?
A standard drink definition varies by country. In the UK and many other countries, 1 unit = 10ml pure alcohol. In the US, a standard drink is 14ml of pure alcohol. This calculator uses the 10ml definition.
How many calories are in a unit of alcohol?
Alcohol itself has 7 calories per gram (about 56 calories per unit). On top of that, drinks carry calories from sugar and other ingredients - a pint of beer has 180-250 calories, a glass of wine around 120-160. The tool shows an estimate alongside the unit count.