Units of Alcohol A unit of alcohol is 10ml of pure alcohol. Counting units of alcohol can help us to keep track of the amount we're drinking. The list below shows the number of units of alcohol in common drinks:- A pint of ordinary strength lager (Carling Black Label, Fosters) - 2 units  A pint of strong lager (Stella Artois, Kronenbourg 1664) - 3 units  A pint of bitter (John Smith's, Boddingtons) - 2 units  A pint of ordinary strength cider (Dry Blackthorn, Strongbow) - 2 units  A 175ml glass of red or white wine - appx 2 units A pub measure of spirits - 1 unit  An alcopop (eg Smirnoff Ice, Bacardi Breezer, WKD, Reef) - appx 1.5 units Lagers and ciders sold in bottles are usually stronger than those sold on draught. The labels of some bottled drinks will tell you how many units of alcohol are in the bottle.