alcohol

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What is a unit of alcohol?

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Answer ( 1 )

  1. One unit of alcohol is 10 ml (1 cl) by volume, or 8 g by weight, of pure alcohol. For example:
    One unit of alcohol is about equal to:
    Half a pint of ordinary strength beer, lager, or cider (3-4% alcohol by volume); or
    A small pub measure (25 ml) of spirits (40% alcohol by volume); or
    A standard pub measure (50 ml) of fortified wine such as sherry or port (20% alcohol by volume).
    There are one and a half units of alcohol in:
    A small glass (125 ml) of ordinary strength wine (12% alcohol by volume); or
    A standard pub measure (35 ml) of spirits (40% alcohol by volume).
    But remember, many wines and beers are stronger than the more traditional ordinary strengths. A more accurate way of calculating units is as follows. The percentage alcohol by volume (% abv) of a drink equals the number of units in one litre of that drink. For example:
    Strong beer at 6% abv has six units in one litre. If you drink half a litre (500 ml) – just under a pint – then you have had three units.
    Wine at 14% abv has 14 units in one litre. If you drink a quarter of a litre (250 ml) – two small glasses – then you have had three and a half units.
    Some other examples
    Three pints of beer, three times per week, is at least 18-20 units per week. That is nearly the upper weekly safe limit for a man. However, each drinking session of three pints is at least six units, which is more than the safe limit advised for any one day. Another example: a 750 ml bottle of 12% wine contains nine units. If you drink two bottles of 12% wine over a week, that is 18 units. This is above the upper safe limit

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