Spike Brewing Giveaway - New v3 Kettle

Home Brew Forums > Home Brewing Beer > General Beer Discussion > ABV conversion
Reply
 
Thread Tools
Old 07-07-2012, 04:25 AM   #1
meadsupporter
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2011
Location: nowhere, nevada
Posts: 81
Default ABV conversion

ABV conversion


I normally have a caculator that does the work for me but I guess today it will not let me enter the values, and I forget the conversion formula.


Long story short my OG was 1.051 and my FG was 1.014
can anyone tell me the approx alcohol by volume [ABV]?





* a bit off topic but i do not taste any 'buttery popcorn'; so I guess I did the diacetyl rest correctly


meadsupporter is offline
 
Reply With Quote
Old 07-07-2012, 04:29 AM   #2
passedpawn
Waste Allocation Load Lifter - Earth Class
HBT_ADMIN.png
Feedback Score: 1 reviews
 
passedpawn's Avatar
Recipes 
 
Join Date: Apr 2009
Location: ☼ Clearwater, FL ☼
Posts: 24,041
Liked 5934 Times on 3541 Posts
Likes Given: 5142

Default

(og - fg ) * 133

4.9%


__________________
- Andrew
passedpawn is offline
 
Reply With Quote
Old 07-07-2012, 04:37 AM   #3
homebrewdad
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
homebrewdad's Avatar
Recipes 
 
Join Date: Jan 2012
Location: Birmingham, AL
Posts: 3,269
Liked 382 Times on 278 Posts
Likes Given: 252

Default

I keep reading that the formula is (OG - FG) * ~131... and I have seen 131.25 several times as the more accurate number.

I've also seen a couple of references to 129.

Using my 131.25 gives you an ABV of 4.86%... which is close enough to passedpawn's number as to not matter one whit.
__________________
Check out the priming sugar calculator, yeast starter calculator, and the beer calorie calculator.
homebrewdad is offline
 
Reply With Quote
Old 07-07-2012, 04:41 AM   #4
passedpawn
Waste Allocation Load Lifter - Earth Class
HBT_ADMIN.png
Feedback Score: 1 reviews
 
passedpawn's Avatar
Recipes 
 
Join Date: Apr 2009
Location: ☼ Clearwater, FL ☼
Posts: 24,041
Liked 5934 Times on 3541 Posts
Likes Given: 5142

Default

Quote:
Originally Posted by homebrewdad View Post
I keep reading that the formula is (OG - FG) * ~131... and I have seen 131.25 several times as the more accurate number.

I've also seen a couple of references to 129.

Using my 131.25 gives you an ABV of 4.86%... which is close enough to passedpawn's number as to not matter one whit.
Maybe it's 131 That was from memory. In fact, I know I've done that exact thing before (wrong multiplier). Sorry.

You know, I always just look at the OG to know what the final ABV is going to be. I.e., this one should be about 5.1% (1.051). Mathematically, if you assume 76% attenutation, my shortcut works perfectly.
__________________
- Andrew
passedpawn is offline
 
Reply With Quote
Old 07-07-2012, 05:35 AM   #5
amandabab
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2012
Location: spokane, wa
Posts: 1,971
Liked 240 Times on 183 Posts
Likes Given: 446

Default

5 is a nice round #.
amandabab is offline
 
Reply With Quote
Old 07-07-2012, 05:40 AM   #6
homebrewdad
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
homebrewdad's Avatar
Recipes 
 
Join Date: Jan 2012
Location: Birmingham, AL
Posts: 3,269
Liked 382 Times on 278 Posts
Likes Given: 252

Default

Quote:
Originally Posted by passedpawn View Post
Maybe it's 131 That was from memory. In fact, I know I've done that exact thing before (wrong multiplier). Sorry.

You know, I always just look at the OG to know what the final ABV is going to be. I.e., this one should be about 5.1% (1.051). Mathematically, if you assume 76% attenutation, my shortcut works perfectly.
Very cool way to ballpark it.
__________________
Check out the priming sugar calculator, yeast starter calculator, and the beer calorie calculator.
homebrewdad is offline
 
Reply With Quote
Old 07-07-2012, 06:29 AM   #7
CBXBob
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
CBXBob's Avatar
Recipes 
 
Join Date: Mar 2012
Location: Grants Pass/ Nuevo, Or. / Ca.
Posts: 481
Liked 100 Times on 65 Posts
Likes Given: 198

Default

1.054 -1.014=0.04 x 131=5.24 That the way I'ver been figuring it. just checked the FG on my watermelon Wheat 1.010 (extra sugar added) Started at 1.062-1.010=0.052X131=6.812, not bad for a wheat, Just tasted the sample, a little thin, but the watermelon flavor is nice


CBXBob is offline
 
Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Keg Conversion Help friedpicklechips General Beer Discussion 4 06-17-2012 01:40 AM
Spice Conversion lx302 General Beer Discussion 6 10-27-2011 12:52 AM
hops conversion maxmarie90 General Beer Discussion 4 06-18-2011 06:52 PM
BMC friend conversion!!! JOHN51277 General Beer Discussion 20 05-09-2010 08:55 PM
Messed up on Conversion tfries General Beer Discussion 6 12-30-2008 05:12 PM


Forum Jump