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Gravity points for priming


read 546 times • 5 replies • posted 11/2/2012 10:17:46 AM

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sharpe1987 8:
How do you determine how many gravity points you need to add to your beer to prime to a certain carbonation level?

Ex. I had 3.5 gallons of beer, shooting for 2.4 volumes of CO2. I think I added 3 oz of cane sugar. Ended up going from 1.010 FG to 1.015 when going into the bottle.
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NobleSquirrel 3437:209
do you have any software? Iíd recommend getting beersmith... Also, sounds like you bottled way to soon on the other beer.
11/2/2012 11:42:07 AM

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DA 1
Here is an online calc: http://www.tastybrew.com/calculators/priming.html

I think itís something like .02 gravity points gives you 2 vols of CO2, which with the residual CO2 in solution (temp depending) should be around average (2.5 vol) carbonation.
11/2/2012 11:53:19 AM

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17thfloor 2430:18
my understanding is that each point of gravity is 0.5 VOC, and if you have still beer you can assume there is already 1 VOC

so if you want 2.5 VOC total you need to bump the gravity by 3 points

so a 5 point bump would put you around 3.5 VOC (1 at atmospheric pressure +2.5)
11/2/2012 12:00:15 PM

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17thfloor 2430:18
most bottles (12 or 22oz) are rated at 3 VOC but can handle about 3.8 (or more) as a safety that isnít advertised.
11/2/2012 12:01:19 PM

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bitbucket 2159:63
Originally posted by DA
Here is an online calc: http://www.tastybrew.com/calculators

+1

Iíve never cared about the effect on gravity, only the ratio of the weight of the sugar or DME to gallons of beer. I guess you could do it as a gravity calculation, but that feels like overthinking the problem.

And those numbers are ounces by weight, not volume.
11/2/2012 10:00:37 PM

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