Help?

[25518]

I'm asking for help with a simple fromula to get a finale reading on me red ale. The S.G was 1.050. My finale is 1.020. Can't remember fromula. Help?

 

[Double_D]

beginning SG-FG x131= approx abv

 

[Double_D]

1.050 - 1.020 = .030 X 131 = 3.9%. Was it an extract? Are you sure it's done fermenting? Did you mash at like 159?

 

[IPTVEng]

Well there is this generic calculator that may get you in the ballpark:
http://www.brewersfriend.com/abv-calculator/

or find a site that has a full recipe calculator where you enter your recipe and the you're OG and FG and it calculates it for you or brewing software like Beertools, Beersmith or Promash to name a few. And since I'm a MAC user I'll throw in Homebrew Formulator which is what I use.

Also check out this site from some formulas on figuring out gravities:
http://en.wikipedia.org/wiki/Gravity_(alcoholic_beverage)

 

[IPTVEng]

beginning SG-FG x131= approx abv

Yeah, what he said.

 

[25518]

1.050 - 1.020 = .030 X 131 = 3.9%. Was it an extract? Are you sure it's done fermenting? Did you mash at like 159?

150°ish.

 

[25518]

150°ish.

Not an extract.

 

[25518]

Not a extract. I may have pitched my yeast too soon. I did this vatch before reading about rehydrating yeast. That may have caused my low Abv. I'll let it ferment another week. This batch I'm brewing now, I'm more attuned too. A stout. I hope.

 

[Demus]

That's only 60% attenuation, are you sure it's done? Why not leave it alone for a week and check again?

 

[unionrdr]

Mashing around 150F should've given a very fermentable wort. It should get down around 1.010-1.012 FG. Anyway the Cooper's formula is (OG-FG) /7.46 + .5 = ABV%. The + .5 is allowing for the priming solution's addition while fermenting in the bottles to produce carbonation.