Atmosphere (unit)

The standard atmosphere (symbol: atm) is a unit of atmospheric pressure. It refers to the air pressure at sea level and is defined as equal to 101,325 Pa.BIPM Definition of the standard atmosphere

Since 1982, it has been replaced by the bar, which is exactly 105 Pa.IUPAC.org, Gold Book, Standard Pressure The use of either unit is discouraged.

 Related pages
Standard temperature and pressure
 References 

Category:Units of pressure