How many fluid ounces are in a fifth of liquor?

1 Answer
Jun 17, 2017

A fifth of liquor now contains #25.4# US fluid oz.

Explanation:

The name comes from the measurement originally being one fifth of a US gallon of #128# fluid oz.

#(128oz)/5=25 3/5oz = 25.6oz#

And: #25 3/5oz = 757ml#

Then metrification came along in 1979, and the fifth was reduced to #750ml#.

#750ml= 25.4# US fluid oz