http://seanterrill.com/2011/04/07/refractometer-fg-results/ Sean is interviewed on Basic Brewing Radio recently: http://www.basicbrewing.com/index.php?page=radio He compiled data and adjusted the equation to correct the post-fermentation Brix readings to be closer to the Specific Gravity reading. I am not claiming to fully understand all of this, but if any of you take such readings, maybe you want to give his new spreadsheet a try. I put in a few numbers I had on hand and it seems to be pretty accurate. I will be taking more refractometer readings after fermentation (something I don't normally do), along with hydrometer readings, and see how accurate it seems to be. cheers Don p.s. two posts from me in two days, a new personal record. ____________________________________________________________ Get Free Email with Video Mail & Video Chat! http://www.juno.com/freeemail?refcd=JUTAGOUT1FREM0210