Re: Brix to FG calculation I would say that mixed results would be a generous way of putting it. I generally just use the refractometer because pulling a 200mL sample for the hydrometer every day just wastes so much beer. The refractometer may not provide an exact correlation to a SG but it...

I use a refractometer to do all of my "specific gravity" fermentation measurements because it takes so little beer to do a measurement. The alcohol in solution makes the standard Brix to SG calcuation not work, as it changes the refraction index of the solution, but it is good enough to tell...