Standard atmosphere (unit)

Atmosphere
Atmosphere
Unit of	Pressure
Symbol	atm
Conversions
1 atm in ...	... is equal to ...
SI units	101.325 kPa
US customary units	14.69595 psi
other metric units	1.013250 bar

Aneroid barometer for household use from c. 1925

The standard atmosphere (symbol: atm) is a unit of pressure defined as 101325 Pa. It is sometimes used as a reference pressure or standard pressure. It is approximately equal to Earth's average atmospheric pressure at sea level.^[1]

^ "Water Pressures at Ocean Depths". NOAA Pacific Marine Environmental Laboratory. Retrieved 11 October 2022.

[1] "Water Pressures at Ocean Depths". NOAA Pacific Marine Environmental Laboratory. Retrieved 11 October 2022.

[1]