PROOF GALLON CALCULATOR
What are %ABV and Proof?
Alcohol by volume (%ABV) and Proof are both measures of alcohol content of spirits. You calculate the proof of a spirits product is by multiplying the percent of alcohol by volume by two (2). For example, a spirits product that has a 40% alcohol content by volume is 80 proof [40 multiplied by 2 = 80].
Use either calculator below, depending on if you are measuring by ABV or Proof.