ATM Pressure Conversion Calculator

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Choose the unit you already know; enter its value below.
The pressure value in the unit selected above.
Atmospheres
1atm

Standard atmosphere (1 atm = 101,325 Pa)

Pascals101,325Pa
Kilopascals101.325kPa
Bar1.01325bar
Millibar1,013.25mbar
PSI14.6959psi
Torr760Torr
mmHg760mmHg
inHg29.9213inHg
atm1
bar1.01325
kPa101.325
PSI14.6959

1.0000 atm converted to all common pressure units.

  • This is exactly standard atmospheric pressure at sea level.
  • 1.0000 atm is equal to 14.70 PSI and 101.33 kPa.
  • The Torr and mmHg results are identical because 1 Torr is defined as exactly 1 mmHg in modern metrology.

Next stepFor blood-pressure readings use mmHg; for weather reports use mbar or inHg; for tyre pressure use PSI or bar.

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