I did a convertion a little while ago. It's at 20 C and 1 atm. It converted CFM to g/sec CFM * 0.56 = g/sec So multiply 0.56 by 60 sec/min and divide by 454 g/Lbs. The bottme line is CFM * 0.074 = Lbs/min For different temps, multiply by the ratio by 528/(New temp) (This is in Farenheit) From the Ideal Gas Law Good Hunting, Mike