Alcohol Calculator
Alcohol affects the measured index of refraction, so we need to correct for that post-fermentation using the original brix measurement.

Information

This tool allows you to convert between brix and gravity and calculates alcohol by volume (ABV) as well as alcohol by weight (ABV).

Formula:
ABV = (OG - FG) × 131
ABW = ABV × 0.79336 
GRAVITY = BRIX ÷ (258.6 - (BRIX ÷ 258.2 × 227.1))) + 1 
BRIX = (((182.4601 × GRAVITY - 775.6821) × GRAVITY + 1262.7794) × GRAVITY - 669.5622)