Marine CO2 Level Calculator

* Special thanks to Boomer from www.reefcentral.com for his help.

This calculator estimates the concentration of carbon dioxide (CO2) in a marine (saltwater) aquarium given a few relevant parameters.

Carbonate* Alkalinity:
 

pH:
 pH Units

Salinity:
 

Temperature:
 



CO2 Level:
 

* Carbonate alkalinity can be determined by subtracting borate alkalinity from the total alkalinity. If you cannot determine your borate alkalinity, you can report your total alkalinity here but the results will not be as accurate.