# How do I calculate how much sugar to add, for carbonation

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.

-

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!