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Conversion Calculator “mg/m3 to ppm” or “ppm to mg/m3”

The conversion equation is based on 25 ºC and 1 atmosphere:

X ppm   =   (Y mg/m3)(24.45)/(molecular weight)
or
Y mg/m3   =   (X ppm)(molecular weight)/24.45


Fill in either the “ppm” value (X) or the “mg/m3” value (Y) AND the molecular weight of the compound. Then press the “Calculate” button.

ppm:

mg/m3:

molecular weight:

      

ppm value

mg/m3 value

based on the molecular weight of

Remember to consider significant digits in your use of the answer.

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