I thought I could make a quick little post with a simple accurate formula for getting a brews ABV so I can just plug in my numbers and not have to do math. But I cant seem to get a simple accurate formula, I have found multiple formulas. The question becomes witch to use.

The simplest formula I have found is ABV = (og – fg) * 131 but from what I have read isn't the 100% accurate. Below I'll outline all the formulas I found and apply them to the brew I just bottled.

My Brew is a Belgian farmhouse Ale with a OG: 1.072 and a FG: 1.013 the results range from 7.73% to 8.15 % alcohol, I guess a difference of 0.4% is a lot.