Units are a clever way to help you know just how strong your drink is.
One unit of alcohol is 10 ml or 8g of pure alcohol. This equals one 25ml measure of whiskey, a third of a pint of beer, or half a standard glass of red wine.
It takes an average adult one hour to process one unit of alcohol. But that time can differ depending on your height and weight.
Many people are very surprised by the number of calories in alcohol.
Alcoholic drinks are made by fermenting sugar before they are distilled. Being high in sugar means alcohol can contain lots of calories – as much as seven calories a gram.
How much is too much?
The government advises that people should not regularly drink more than the lower risk guidelines (14 units a week for men & women).