What is the proof of 28 percent alcohol?

To determine the proof of an alcoholic beverage, you need to know its alcohol content by volume (ABV). Proof is a measurement used in the United States and is defined as twice the ABV. Therefore, a 28 percent alcohol proof beverage would have an ABV of 14 percent.

This means that out of every 100 milliliters (mL) of that beverage, 14 mL is alcohol and the remaining 86 mL is made up of other components such as water, flavorings, and other ingredients.