This priming sugar calculator will help you to work out the approximate amount of sugar to add to you beer or cider in order to carbonate it to a particular level of CO2.

This calculator takes into account a couple of variables that will affect the final carbonation. There is a detailed guide to priming sugar here which details these variables further.

All you need to know is the temperature of the beer, the amount of beer and the volume of CO2 you want to achieve. Below is a chart detailing typical levels of CO2 in different beer styles.

Level of Carbonation accourding to different beer styles

 
To calculate how much priming sugar you’ll need in a batch of beer you first need to know a few things:

• How much beer you have made
• How much carbon dioxide is already in the beer (which is dependent on temperature)
• How much carbonation you want in the finished beer

The first point is easy, you know how much beer is in the fermenter. How do you know how much carbon dioxide is already in the beer though?

The level of CO2 already in the beer is affected by the temperature of the beer at the end of the fermentation. The colder the beer is, the higher the level of CO2 or residual carbonation.

This level of residual carbonation, and carbonation in general, is measured as “volumes of CO2”. The term volumes of CO2 is a way of measuring the level of carbonation in your home brew. What this means in basic terms is that for 1 volume of CO2, there is 1 litre of carbon dioxide is dissolved into 1 litre of liquid which in our case is beer.