Decibars to atmospheres (standard) converter above calculates how many atmospheres (standard) are in 'X' decibars (where 'X' is the number of decibars to convert to atmospheres (standard)). In order to convert a value from decibars to atmospheres (standard) (from dbar to atm) type the number of dbar to be converted to atm and then click on the 'convert' button.