Dissolved CO2 and SG

[superstock]

How much does dissolved CO2 effect SG readings?

 

[elcarter]

Grab some beer measure the initial SG then shake it, pour from one glass to another couple of times and see if there's any difference?

Think I read somewhere carbed up beer would be a point or so lower but not much.

 

[Greg.L]

It isn't something you have to account for. Solubility is about 1.5 g/L,but it forms carbonic acid which is 1.5 times more dense than water.It may increase the sg slightly but not enough to be measurable with an ordinary hydrometer. Bubbles attached to the hydrometer will affect your reading.

Edit- most of the co2 doesn't form carbonic acid so stays as molecular co2 .