Hello All, I see you want some calculators. I have built one in a Microsoft Excel spreadsheet to calculate CO2 concentrations based on two different formulas. One is based on the age old formula that all the charts use and the other is based on an updated calculation I found in an article by George Booth. Also is a exspanded chart in excel I created to show CO2 concentrations between the PH ranges that the old charts don't show, just to get a little more detailed. The article for the updated calculation is attached also. Had to zip all the files due to size and file extensions not supported in the forum. I assure no viruses in files. I hope this helps.
Enjoy
David
CO2 Calculator.zip
EXPANDED CO2 CHART.zip
New Updated CO2 Calculations.zip