A fifth of whiskey contains 25.6 fluid ounces. The bottle contains onefifth of a gallon, and a gallon contains 128 fluid ounces; onefifth of 128 equals 25.6.
Several states had ordinances that set the measurement of 1/5 gallon as the legal threshold for selling liquor by the bottle or by the drink, which indicated whether the whiskey could be sold at a dry goods store or at a licensed barroom.
In the metric system, a fifth of whiskey contains 757.08 milliliters or roughly threequarters of a liter. This is roughly equivalent to the size of a standard wine bottle, which is 750 milliliters.
There are 25.6 ounces in a fifth of whiskey. A fifth is 1/5 of a gallon.
http://wiki.answers.com/Q/How+many+grams+in+an+oun...

A fifth of whiskey is 26.5 fluid ounces, which is about 3 1/4 cups. Thanks
http://www.chacha.com/question/howmanyouncesare...

It is a fifth of a gallon. 1 Gallon [Fluid, US] = 128 Ounces [Fluid, US]
http://answers.yahoo.com/question/index?qid=201205...

There are 25.6 ounces
http://www.blurtit.com/q8851815.html
