[quote=“Bier brauer”]It’s getting the best of me.
From my notes: OG was 14.02 brix converted to 1.057. On 07/29 I took a FG brix reading of 8.6 or 1.033. On 07/31 I got a brix reading of 8.9. How did that happen? I don’t know. On 08/01 I got a brix of 7.6 or 1.030. I calibrated the refractometer on 08/04 and took a reading another FG reading. It read 9.7. The calibration ring on the refractometer was not loose so I don’t have any idea how it got out of calibration, unless it came from the factory that way. I never checked it to see.
I just plugged in the numbers from our hosts calculators.
Brix to gravity during and after fermentation converter: 14.02 OG Brix, 9.7 current Brix= 1.027 gravity.
Approx. ABV and original gravity from current Brix and gravity converter: current Brix 9.7, current gravity (I used the number from above) 1.027 calculated to 3.515 ABV, OG of 1.054 which is close.
What do ya think? I know these have to be off because of the refractometer being out of calibration. Plus, I didn’t use the hosts calculator when checking the FG. I used a conversion table I pulled from another site not taking into account the alcohol content of the beer.
Maybe it is not as bad as it seems.
When I plug those Brix numbers into my calculator, I get a starting gravity of 1.055. For your final gravity, I would use the 7.6 reading from 8/1, before you recalibrated, just to keep things consistent. 7.6 Brix with a starting gravity of 1.055 gives us a FG of 1.015. A few points higher than I would want my Kolsch, but still much better than you thought you were at.