how to convert bar to atm

To convert a measurement from bar (a metric unit of pressure) to a standard atmosphere (atm), you need to divide the pressure value in bar by the conversion factor. The relationship is that one bar is approximately equal to 0.986923 atmospheres. Therefore, to convert, multiply your pressure value in bar by 0.986923 to get the value in atm. For many general calculations, the difference is considered negligible, as 1 bar is very close to 1 atm.