Innovative Technology For Trace Organic Analysis
Seach
TEL: +44 (0)1443 230 935
Mobile Menu

How do I convert ppm to mg/m3 and ppb to µg/m3?

The two formulae used are:

Unit conversion

For more information on calculating atmospheric concentrations, refer to Application Note 025.

Note that the ppm and ppb concentrations in these formulae are by volume, and the molar volume at 1 atm and 25°C is 24.45 L.



Conversion Calculator



To convert units based on 25°C and 1 atm, fill in the ppm value (or the mg/m3 value) and the molecular mass, and click “Calculate”.
ppm:
mg/m3:
molecular mass:
      

ppm value
mg/m3 value
based on the molecular mass of


UK
UK
Markes International Ltd
Gwaun Elai Medi-Science Campus
Llantrisant
RCT
CF72 8XL, UK
Tel: +44 (0)1443 230935
Germany
Germany
Markes International GmbH
Schleussnerstrasse 42
D-63263 Neu-Isenburg
Frankfurt
Germany
Tel: +49 (0)6102 8825569
USA (West)
USA
Markes International, Inc
2355 Gold Meadow Way
Gold River
California 95670
USA
Tel: 866-483-5684 (toll-free)
Part of Schauenburg International
Top