atm

What is a Atmosphere?

Definition

An atmosphere (atm) is a unit of pressure defined as 101,325 pascals, representing the average air pressure at sea level.

Popular Atmosphere Conversions

Most common conversions from Atmospheres

1 atm = 101,325 Pa Atmosphere to Pascals 1 atm = 101.325 kPa Atmosphere to Kilopascals 1 atm = 0.101325 MPa Atmosphere to Megapascals 1 atm = 1.0133 bar Atmosphere to Bars 1 atm = 1,013.25 mbar Atmosphere to Millibars 1 atm = 14.6959 psi Atmosphere to PSI

History

The atmosphere was originally defined as the pressure exerted by the weight of the atmosphere at sea level. It was standardized in 1954.

Common Uses

Scientific pressure reference
Scuba diving calculations
Chemistry (standard conditions)
Altitude calculations

Fun Facts

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At 10 meters underwater, pressure is 2 atmospheres

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The top of Mount Everest has about 0.33 atmospheres

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Standard Temperature and Pressure (STP) is 1 atm at 0°C

All Atmosphere Conversions

Atmospheres to Pascals atm → Pa Atmospheres to Kilopascals atm → kPa Atmospheres to Megapascals atm → MPa Atmospheres to Bars atm → bar Atmospheres to Millibars atm → mbar Atmospheres to PSI atm → psi Atmospheres to Torr atm → Torr Atmospheres to mmHg atm → mmHg