See https://www3.epa.gov/ceampubl/learn2model/part-two/onsite/doc/Indoor%20Air%20Unit%20Conversions.pdf https://www3.epa.gov/ceampubl/learn2model/part-two/onsit

See https://www3.epa.gov/ceampubl/learn2model/part-two/onsite/doc/Indoor%20Air%20Unit%20Conversions.pdf https://www3.epa.gov/ceampubl/learn2model/part-two/onsite/do... (I just found this with a web search and wasn't familiar with it before). It looks like it also requires an adjustment based on molar mass of the particular substances involved.