We measure drinks to mix them, to know the alcohol content, to sell them, and to see how many calories are in them.

The metric system uses (milliliters or millitres) but anglosaxons often use fluid ounces (abbreviated oz). One US fluid is about 29.573 ml, and a typical can of soft drink contains 333ml.

		ml    ounces
shot 		29.5 	1
jigger 		44.5 	1 1/2
dash  	 	0.9  	 1/32
teaspoon 	3.7 	1/8
tablespoon 	11.1 	3/8
pony 		29.5 	1
splash 		3.7 	1/8
cup 		257 	8
measure / msr 	26.5 	0.9
wine glass 	119 	4
nip / miniature	59.2 	2
pint (US) 	472 	16
pint (UK) 	568 	19.3
fifth 		755.2 	25.6
quart 		944 	32
Imperial quart 	1137 	38.4
gallon (US) 	3789 	128

Alcohol content of products is usually measured as a percentage of the liquid volume, Alcohol by Volume or ABV. In the USA this is turned into a measure called “proof” which is twice the percentage, so a vodka with 40% alcohol by volume is 80 proof.

For health purposes a standard measure of “units” is used to see how much alcohol a person drinks in a day or week Different countries have different standard measures for this and recommend different “safe” levels of drinking.

Australia	12.7		
Italy		12.7
Canada		17.1		
Japan		25.0
New Zealand	12.7
France		15.2		
Portugal	17.7
Spain		12.7
UK		10.0
Ireland		12.7
USA		17.7

Blood Alcohol Content, or BAC, measures how many milligrams of alcohol per 100 ml of blood there are in a person’s bloodstream, giving an idea of how much their abilities will be affected by what they have drunk. Legal levels vary for driving after drinking.