How many cups is in a fifth of alcohol?

A "fifth" is a colloquial term often used to refer to a standard-sized bottle of distilled spirits, typically containing 750 milliliters (mL) of liquid. To convert milliliters to cups, you need to divide the volume in milliliters by 236.588, which is the number of milliliters in one cup.

Therefore, a fifth of alcohol contains approximately 3.17 cups.