CDC - NIOSH Publications and Products - Conversion Calculator (2004-101)
The conversion equation is based on 25 ºC and 1 atmosphere: X ppm = (Y mg/m 3)(24.45)/(molecular weight) or Y mg/m 3 = (X ppm)(molecular weight)/24.45 Fill in either the "ppm" value (X) or the "mg/m 3" value (Y) AND the molecular weight of the ......