How to estimate ABV? - Home Brew Forums

 Home Brew Forums > How to estimate ABV?

10-01-2009, 10:15 PM   #1
SMOKEU
Recipes

May 2009
NZ
Posts: 240

I'm looking for a calculator so I can estimate the ABV before I even start a brew. For example, if I add X amount of LME into a 23L batch I will get X% ABV.

10-01-2009, 10:35 PM   #2
blowmax10
Recipes

Mar 2008
Posts: 364
Liked 1 Times on 1 Posts

you could use beer calculus

http://hopville.com/
__________________
The Joplin Homebrew club

10-02-2009, 01:41 AM   #3
sub-zero
Recipes

Jun 2009
Keokuk Iowa
Posts: 400

Og - Fg / 7.36 = Abv
__________________
Running down the hallways of life with shoes untied blind fold on and scissors in both hands
===============
===============
In the Bottle--
(1968)Warsaw Pact IPA
Primary--
Socialist Pig Pale Ale
Bullshivit RIS
Big Ivan IIPA
--
BULLSHIVIT BREWING CO.

Just Good Beer And No BULLSHI-VIT!!!!!

10-02-2009, 01:55 AM   #4
Kickass
Recipes

Jan 2009
Wichita, KS
Posts: 227
Liked 2 Times on 2 Posts

This was something i looked into during my first batch and was amazed at how many different ways people determine %ABV. I found a few that were middle of the road, took an average and that's what i use. I know, homebrewing and several different ways to do the same thing, go figure.

10-02-2009, 06:21 AM   #5
SMOKEU
Recipes

May 2009
NZ
Posts: 240

Quote:
 Originally Posted by sub-zero Og - Fg / 7.36 = Abv
I know that, what I want to know is how much malt extract I need for a certain ABV in a certain sized batch.

10-02-2009, 10:31 AM   #6
dantodd

Recipes

Oct 2006
San Carlos, CA
Posts: 1,173
Liked 11 Times on 9 Posts

36 points per gallon per pound of liquid extract
44 points per gallon per pound of dry extract

10-02-2009, 11:47 AM   #7
danielinva
Recipes

Jun 2008
Henrico, VA
Posts: 259
Liked 1 Times on 1 Posts

You'll also need to check the % attenuation of whatever yeast you end up using, along with aerating your wort sufficiently enough that the yeast can eat through all the sugar they are supposed to. Probably not as cut and dry as you would have liked, but I suppose if you just wanted to guesstimate the abv you could assume a FG of somewhere between 1.010 and 1.020 and do the calculations off of that.

10-02-2009, 11:54 AM   #8
Homercidal

Recipes

Feb 2008
Reed City, MI
Posts: 31,729
Liked 5106 Times on 3453 Posts

Beer smith can help you plan a recipe and will give you ABV, color, etc. It's an awsum tool.
__________________
Day after day, it reappears. Night after night my heartbeat shows the fear. Ghosts appear and fade away. Come back another day.

10-02-2009, 01:06 PM   #9
FishinDave07
Recipes

Oct 2007
South Florida
Posts: 1,364
Liked 2 Times on 2 Posts

I use BeerSmith and love it. Before that i used The Beer Recipator
__________________
Primary: Nothing
Secondary: DFH Punkin Ale
Bottled/Conditioning: Cigar City Jai Alai IPA Clone, Apple Jack 1.0, Apple Jack 2.0
Drinking: Yakima Blonde (Imperialized), Banana Wheat, Russian Imperial Stout, and anything i can get my hands on
On Deck: Watermelon Wheat, Red Panda Ale, Gluten Free Brown Ale, Mojito IPA, Smoked Pepper Stout