Update 7/2013 -
The calculator now displays the volumes of dissolved CO2
in the beer prior to adding priming sugar.
As the beer was fermenting it naturally retained some CO2
. The amount of dissolved CO2
is temperature dependent.
Don't Over Prime!
The amount of sugar the calculator tells you to add will take the beer from the current level of CO2
to the desired level.
When bottling I typically do 3.5 ounces of corn sugar (dextrose) by weight for 5 gallons. This yields about 2.1 volumes of carbonation,
which is plenty. Over carbonation leads to a lot of problems, like swollen caps, exploding bottles,
and a really annoying time trying to pour foamy beer.
See our article on home brew bottle bombs
Notes on Sugars:
Corn sugar and dextrose are the same thing.
Dextrose is the most popular priming sugar.
Table sugar can also be used, and it is assumed that corn sugar is 91% sugar,
while table sugar is 100% sugar.
Dry Malt Extract (DME) is another option.
This calculator uses 68% attenuation for DME.
Measuring Priming Sugar:
We recommend measuring priming sugar by weight. The values this calculator reports are by weight, not by volume.
Weight is the most reliable method. Use the same scale you use for hop additions.
Other sources will say add X cups of sugar. The problem we have with this is, there could be air pockets inside the scoop,
making it hard to tell just how much is in there. Yeah it will get you close most of the time, but it is not reliable or repeatable in
comparison with measuring by weight. An under primed batch of beer is a real bummer, don't let a measuring cup be the cause.
Legal Disclaimer: The Brewer's Priming Calculator is for entertainment purposes
and should not be used for professional brewing.
No warranty or guarantee of accuracy is provided on the information provided by this calculator.