Standard atmosphere (atm)

A unit of pressure.

Symbol: atm
System: metric
Category: Pressure
Exact?: Yes

Definition source: 1 atm = 101 325 Pa exact (BIPM).

Also written as: atm, atmosphere, atmospheres

Common conversions from atm

1 atm = 101,325 Pa

Standard atmosphere → Pascal

1 atm = 101.325 kPa

Standard atmosphere → Kilopascal

1 atm = 0.101325 MPa

Standard atmosphere → Megapascal

1 atm = 1,013.25 hPa

Standard atmosphere → Hectopascal

1 atm = 1.0133 bar

Standard atmosphere → Bar

1 atm = 1,013.25 mbar

Standard atmosphere → Millibar

1 atm = 14.6959 psi

Standard atmosphere → Pound per square inch

1 atm = 0.014696 ksi

Standard atmosphere → Kilopound per square inch

1 atm = 760 Torr

Standard atmosphere → Torr

1 atm = 759.9999 mmHg

Standard atmosphere → Millimeter of mercury

1 atm = 29.9213 inHg

Standard atmosphere → Inch of mercury

1 atm = 407.1894 inH₂O

Standard atmosphere → Inch of water (60 °F)