The Air Products Gas Converter converts weight and volume measures for industrial gases like nitrogen, oxygen, argon, hydrogen, helium, and carbon dioxide, as well as liquefied natural gas (LNG/methane). Easily and quickly, right from your phone or tablet. And it's free! When converting between liquid and gaseous units, the converter accounts for the unique properties of each industrial gas, particularly molecular weight and density. For LNG, it converts flow rates, including Diesel Gallon E