# How to Calculate “Proof”

Our Stories June 26, 2012 12 Comments.

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Alcohol proof is a measure of how much alcohol (ethanol) is contained in an alcoholic beverage. In the United States, alcoholic proof is defined as twice the percentage of abv. So, 100-proof whiskey contains 50% alcohol by volume; 86-proof whiskey contains 43% alcohol.

In beer, alcohol content is 3-12% abv, but it is most often 4-6%. Conventional wines will have 9-16% abv, with most being between 12.5-14.5%. Fortifiied wines, such as port, madeira, marsala, sherry, and vermouth, have 15.5-20% abv. (The wine is “fortified” by adding a distilled spirit, usually brandy, to it.)
Stronger drinks, such as liquors, are distilled after fermentation to increase their alcohol content. These range from 20-95% abv.
Now you know.

## 12 thoughts on “How to Calculate “Proof””

1. W Leagans

Confused I have 128 ounces of apple cider. I have 16 ounces of 105 proof spirits What is the approximate proof of the cider?.

2. Math Whiz

@W Leagans:

What is the alcohol by volume (ABV) and proof of a mixed drink consisting of 128 oz apple cider and 16 oz spirit that is 105 proof?

1. Figure out the total alcohol by volume of the spirit:
105 proof = 52.5% alcohol by volume
52.5% = 0.525
16 oz spirit X 0.525 alcohol by volume = 8.4 alcohol by volume / oz
2. Now figure out the total volume of the drink:
128 oz apple cider + 16 oz spirit = 144 oz mixed drink
3. Now take alcohol by volume / oz multiply by total volume of drink to find ABV of the mixed drink:
8.4 alcohol by volume / oz X 144 oz mixed drink = 0.058 or 0.058 X 100 = 5.8% ABV = 11.6 proof.

That bowl of mixed drink you made has the alcoholic content equivalent of a 12 oz can of Natural Ice beer with 5.9% ABV.

If you drink the whole bowl you would have consumed exactly an equivalent of 12 cans of Natural Ice beer. ENJOY!!

3. Skiddboot

Why are we only seeing ABV for wine? Does the Proof formula breakdown w/ wine?

4. james dean

this does not tell you how to calculate the ABV from proof or vice versa.

5. Charlie

Trying to figure proof if I add 750ml 190 to a gallon of apple cider .what’s the equation

6. Zack

Of i have one gallon of 160 clear alcohol and add 2 gallon of apple cider and 2 gallons of apple juice what would beer my final proof. I have been having hard time here

7. William Forrest

I have 19% wine and it’s in a 5 gallon waterr-jug what is the alcohol proof?

8. Stephan Miller

Hello everyone with questions follow these steps to find the proof:

1. Multiply your percent alcohol by the total volume. So if you have 19% of 100% alcohol then do .19 * (five gallons) = .95 of the solution is alcohol. This tells you how much alcohol is in there. So you have .95 gallons of alcohol out of 5 gallons.

2. find the percentage of alcohol by dividing the two. So .95 gallons divided by 5 gallons = .19 = 19% alcohol

4. Then we know proof is just the percent alcohol times two. so 19% times two = 38 proof.

9. Carol Williams

I use grain alcohol to make my horses fly spray.
I use it to help solubilize the oils so they will mix with the distilled water.

What I want to know is:
If i mix 1.75 ML of 190 proof Ever clear
With 1.75 ML of 80 proof ever clear
Does the proof / percent go up or down.
Does the 190 proof dilute the 80 proof?
Speaking in terms of Ethanol content. 95 % plus 40% ABV. When mixed together, how do i calculate the total proof and the total ABV amount.?

Thank you so much!