Thanks guys. I feel alot better. Johnny thanks for the fixing my math... i just transfered the yeast so im gonna do another stout with it. Also im but it in beersmith as a sweet stout looks like its gonna turn out good. Im also going to get a refractometer for final reading.
I hope you mean a hydrometer rather than refractometer for the final reading.
I have found that my refractometer is more accurate when measuring OG than a triple scale hydrometer for the beers that I brew regularly. With the hydrometer, I can get a reading accurate within 2 points. With the refractometer, I can get a reading that is accurate within 1 point, but this is using Beersmith or Promash to perform the Brix to SG conversions.
To detect when fermentation is complete, I still use the refractometer, taking a sample once every 4 - 7 days. When the Brix reading stays the same for two consecutive samples, fermentation is complete. I then use a finishing hydrometer (which reads from 0.990 to 1.020) to get the true FG.
I tried using Promash several years ago to convert Brix readings to SG after fermentation. The results were all over the place. I recently compared Sean Terrills calculator to Promash and the finishing hydrometer to get a FG reading.
The hydrometer showed a value of 1.01150
Promash translated the final Brix reading to 1.014 (2.5 points off)
Sean Terrills calculator translated the final Brix reading to 1.016 (4.5 points off).
If I want an accurate FG reading, I'll stick with the hydrometer.
-a.