Crack unit with these simple equations

23 August, 2007

As a wine educator, I am always conscious that I have a responsibility to promote safe and sensible drinking. I am sometimes asked about alcohol"units".

I was not surprised to read in Lulie Halstead's article (OLN, Aug 10) that so many men and women were unable to give the correct answer to the question: "How many units in a large glass (25cl) of wine?" If asked, I would have to say: "I cannot give an answer until you tell me the alcoholic strength (abv) of the wine."

The higher the abv, the more units per glass. The abv must also be known to calculate the units per bottle (75cl).

It is my understanding that in the UK, a unit is 1cl (10ml) or 8gm of alcohol. Based on this, there is a fairly simple way to calculate the units per bottle (75cl) or units per 25cl glass:

1 litre (100cl) of a wine will contain, in units, the same number as the abv.

Thus a litre (100cl) of 12 per cent abv wine will contain 12 units.

Therefore, a bottle (75cl or of a litre) will contain of this, ie x12 = nine units.

Since the 25cl glass is 1/3 of a bottle, this will contain 1/3x9 = three units of the 12 per cent abv wine.

Your readers may find this of help and, I suggest, will be surprised just how many units are contained in a glass (25cl) or bottle of high abv wine. Please do not let them go on thinking that it is only the glass or bottle size that decides the number of units.

Trevor Elliot

Wine educator

Gosport, Hants.




Bookmark this


Site Search

COMMENT

Lifting the spirits

I were to sum up alcohol sales over Christmas 2017 in one word, it would be “gin”. At Nielsen, we define the Christmas period as the 12 weeks to December 30 and in that time gin sales were £199.4 million, which means they increased by £55.4 million compared with Christmas 2016. There’s no sign the bubble is about to burst either. Growth at Christmas 2016 was £22.4 million, so gin has increased its value growth nearly two-and-a-half times in a year. The spirit added more value to
total a

Click for more »
Upcoming events

Polls

Is blended Scotch overshadowed by single malt in retailers?

  • Yes
  • No
  • Don't know

Facebook

Twitter