Changes
From BrewWiki
added calculation
To calculate the approximate alcohol by volume, simply measure the [[Original Gravity]] and [[Final Gravity]] as a 3 digit [[specific gravity]] and apply this formula:
: '''ABV = (Orig_gravity - Final_gravity) * 131''' or to be a little more precise try:: '''ABV = ((1.05 * (Starting SG – Final SG)) / Final SG) / 0.79 * 100'''
==See Also==
