I have a brew, that I will need to bottle soon. But, how do I calculate, how much sugar to add, before bottling? I'll be adding table-sugar, but I am very worried about exploding bottles.

Are there some rules for calculating? I assume the type of beer you're making, also plays in. In my case, it's german wheat beer.

3 Answers 3


Rule of thumb to go by - 1oz sugar per 1gal Beer. That will get you a nice carbonation on most beers. I typically just add 5oz every batch and don't mess with any calculations unless I'm intentionally under-carbonating a stout or something.


Priming sugar amount depends on carbonation level, that is

Total carbonation = CO2 already in beer + CO2 from priming sugar
  • CO2 already in beer depends on the temperature you bottle at
  • CO2 from priming sugar is proportional to amount of sugar used
  • Total carbonation is expressed in volumes (Vol) and depends on beer style.

You can find all this taken care of in online calculator, such as this.

I experienced once a bottle bombing with a wheat beer (I used something like 4Vol ,taht is around 10-12g/l of sugar I guess). It was less dangerous than I thougt, but still potentially dangerous :)


Here is a great online carbonation calculator : http://hbd.org/cgi-bin/recipator/recipator/carbonation.html just type in the desired amount of Co2 and hey presto!

Hope this help you as much as it does for me.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.