What is 750ml equal to?
It's close to a "fifth"Before the adoption of metric units, booze in the U.S. was most commonly bottled in quarts and "fifths." A quart is one quarter of a gallon, and a fifth is -- you guessed it -- a fifth of a gallon. Now, liquor comes in one-liter and 750-ml bottles, which are about the same size as the quart and fifth, respectively.A 750-ml bottle -- the most common size for wine -- is 0.750 liter. In other words, it's three quarters of a liter (because 3/4 = 0.75).One fifth of a US gallon is 25.6 ounces, and 0.75 liter equals 25.4 ounces, so a 750-ml bottle is very close to a fifth.