How Much Alcohol Is in a Fifth Cup?

A fifth of alcohol contains a bit more than 3 cups of alcohol. This implies that you are measuring the alcohol in a typical 8-ounce cup.

How many ounces are in a fifth of alcohol?

A fifth of alcohol has a volume of 750 millilitres. You must know that 1 millilitre is equivalent to 0.033814 ounces in order to convert this amount to ounces. Add 750 to 0.033814 to convert 750 millilitres to ounces. As a result, the ultimate result is 25.3605 ounces.

How to Convert Cups from Ounces

You can translate a fifth of alcohol into cups now that you know it contains 25.3605 ounces. It is calculated that there are 3.17 cups in a fifth of alcohol by dividing 25.3605 by 8 ounces.

The Definition of “Fifth” of Alcohol

Many people are confused as to why a “fifth” of alcohol, which contains 750 millilitres or 25 ounces, is referred to. The fact that the bottle is equal to a fifth of a gallon is indicated by the designation “fifth.”

A gallon has 128 ounces in it. The result of dividing 25.3605 by 128 is 0.1981 of a gallon. It is equivalent to a fifth of a gallon when you round the amount to 0.20. A fifth of alcohol is also equivalent to 1.5 pints or four fifths of a quart.

How to Choose the Number of Fifths to Buy

You might be unclear of how many fifths of alcohol you need to purchase if you’re organising an event or throwing a party. This depends on the type of alcohol you want to serve, the quantity you want to serve, and the number of guests attending your event.

Assume you’ll mostly be serving shots to your visitors. Each fifth of alcohol will yield 16.907 shots if you use a shot glass that is the usual size and weighs 1.5 ounces. Divide 25.3605 by the diameter of your shot glass to find the number of shots in a fifth of booze.

You’ll need 135 ounces of alcohol if you’re serving three 1.5-ounce shots to each of your 30 guests. 25.3605 divided by 135 results in 5.323 fifths of booze, as can be seen. Round this number to the nearest six.

For your celebration, you could wish to prepare an alcoholic punch. Consult your recipe for the proper denominations, then change them to fit the scale of your gathering. If a recipe asks for two cups of alcohol and it serves ten people, you only need one and a half cups of alcohol.

However, this means that you’ll need 6 cups of alcohol if there are 30 guests at your party. Given that each fifth contains three cups of alcohol, you will require two fifths of alcohol to serve all of the partygoers.

Options for sizes other than a fifth of alcohol

Although the fifth used to be the typical denomination for buying alcohol, there are several options available in the modern liquor industry. You could want to get a bottle known as a handle if you need to buy a lot of alcohol. A handle weighs 59.2 ounces or 1.75 litres.

You require a unit smaller than a fifth. Look for alcohol in the “pint” size. A pint of alcohol weighs 12.7 ounces or 375 millilitres.

Misha Khatri
Misha Khatri is an emeritus professor in the University of Notre Dame's Department of Chemistry and Biochemistry. He graduated from Northern Illinois University with a BSc in Chemistry and Mathematics and a PhD in Physical Analytical Chemistry from the University of Utah.


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