All countries have different units of measure. Check this link [url]http://www.cleavebooks.co.uk/scol/ccalcoh3.htm[url] It gives you a drop down list of countries to select and you can see how the units vary from place to place. Frankly, I find the whole counting rather hard to keep track of and sometimes I go with 4 units of wine for 1 750 ml bottle because that is how many glasses it pours for me

and sometimes I actually record the 5 units that the U.S. says it is. So, for me it's not a fine art of keeping track but the ballpark lets me know where I am. Really, if I have 40 drinks vs. 43 I know that I am still drinking too much. The cure isn't going to show up with these kinds of numbers!! I'll know I'm making progress when I count in single digits.