Standard atmosphere (unit)

"Atmospheres" redirects here. For the television series on the Weather Channel, see Atmospheres (TV series). For the album by Justin Jarvis, see Atmospheres (album).
Atmosphere
Unit ofPressure
Symbolatm
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]

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