Apologies up front if there is already a thread addressing this, but I can't find it if there is. What formula can I use to calculate ABV in my home brews? The Joy of Home Brewing provides the following formula:
For purposes of comparison, lets let OSG = 1.080 and FSG = 1.020
This formula yields a ABV of 6.3%
Another formula I've run across is:
This formula yields an ABV of 7.8%
That seems like a pretty large difference between two formulas that are supposed to be calculating the same thing. Is there any consensus out there about a good formula to use (that does not require an advanced degree in mathematics)?