If you are assuming the typical "pint"-sized liquor (375 mL), then simple arithmetic would show that 2 pints = 1 "fifth" (750 mL). If we are talking a true pint of fluid (500 mL), then 1.5 pints = 1 "fifth".
A fifth is a common term for 750 ml of hard liquor, approximately 1/5 of a gallon.
About .75
a fifth of liquor is 750 mL, or 20 ounces. A real fifth though, is actually 755 mL. I am not sure why liquor uses 750 mL other than my theory of the possibility of 20 ounces being so common in The States.
Five of them.
0.79 quarts
A "fifth" is equal to one fifth of a gallon. Therefore, five fifths would be equal to one gallon. A "fifth" is now sold in 750 ml (where ml means milliliter) containers (although still called a "fifth") and 750 ml can be written as 0.75 L (where "L" means Liter) which is the same as 3/4 of a Liter. Therefore, five 750 ml (0.75 L) containers would be equal to 3.75 L. An equation for this could look like: One Fifth of Liquor ~ 750 ml = 0.75 L = 3/4 L, therefore, 5 x One Fifth of Liquor ~ 5 x 750 ml = 5 x 0.75 L = 5 x 3/4 L, therefore, One Gallon ~ 3,750 ml = 3.75 L = 3 & 3/4 L or more simply, 5 Fifths of Liquor is considered equal to 3 Liters & one Fifth... or a gallon if they sell your brand that way.
0.750 mL = about 0.025 fluid ounces.
Champagne is about 13% alcohol. A bottle is typically 750 mL, meaning 97.5 mL of that is pure alcohol. A shot of liquor is 44.36 mL, though a shot of whiskey, tequila, or vodka is typically only 40% pure alcohol. This means a shot is only 17.74 mL of pure alcohol. Thus a bottle of champagne is the equivalent of 5.5 shots of liquor. Since a fifth of liquor holds about 17 shots, a bottle of champagne is equivalent to a third of a fifth of liquor.
1000 ml = 1 liter
50 Ml
A "fifth" of liquor was 1/5 of a U.S. gallon (128 ounces) or 4/5 of a U.S. quart (32 ounces). So 128/5=25.6 ounces or (4/5)*32=25.6 ounces. The current bottles are 750 ml or 25.36 ounces.