Gigapascals to atmospheres (standard) converter on this page calculates how many atmospheres (standard) are in 'X' gigapascals (where 'X' is the number of gigapascals to convert to atmospheres (standard)). In order to convert a value from gigapascals to atmospheres (standard) (from GPa to atm) just type the number of GPa to be converted to atm and then click on the 'convert' button.