Sabina Basnet Chuchhepati, Kathmandu It�s a common misconception that one glass of wine equals one �unit�. The unit in which alcohol is measured for those advocating healthy consumption is actually 10 millilitres of pure alcohol. So to work out how many units are in a glass requires you to know how much alcohol is in the wine, and how much wine is in the glass. For example, a �large glass� is commonly 250 millilitres. If it is a wine with 14% alcohol, it actually contains 3.5 units, not one: the formula is millilitres of liquid (250) x alcohol (14) divided by 1000.