NIST logo
*
Bookmark and Share

Unit Conversions

Pressure

Pa

mbar

Torr

psi

atmosphere

Pa

1

0.01

0.00750062

0.0001450377

0.00000986923

mbar

100

1

0.750062

0.01450377

0.000986923

Torr

133.3224

1.333224

1

0.01933678

0.001315789

psi

6894.757

68.94757

51.7149

1

0.0680460

atm

101325

1013.25

760

14.69595

1


For a additional pressure units, click here.


Gas Flow


atm cm3/s

atm cm3/min

micromol/s

atm L/min

atm cm3 /s

1

0.0166667

0.0123930

0.0000166667

atm cm3 /min

60

1

0.743583

0.001

 micromol /s

6894.76

1.34484

1

0.00134484

 atm L /min

60,000

1000

743.583

1


The volume flow units, which contain "atm", assume that the gas is:

  • ideal
  • at a pressure of 101325 Pa
  • at a temperature of 0 °C


Be aware that the unit "atm cm3/min", which is sometimes abbreviated "sccm" (standard cubic centimeter per minute), sometimes assumes a different temperature.

 



For approximating, remember that:

  • 1 micromol/s ≈ 1.34 sccm ≈ 1 sccm
  • 1 Torr ≈ 1.33 mbar ≈ 1 mbar

Contact

General Information:
Doug Olson
301-975-2956 Telephone
douglas.olson@nist.gov

100 Bureau Drive, M/S 8364
Gaithersburg, MD 20899-8364