Megapascals to atmospheres (technical) conversion calculator shown above calculates how many atmospheres (technical) are in 'X' megapascals (where 'X' is the number of megapascals to convert to atmospheres (technical)). In order to convert a value from megapascals to atmospheres (technical) (from MPa to at) just type the number of MPa to be converted to at and then click on the 'convert' button.