Atmospheres (technical) to megapascals converter on this page calculates how many megapascals are in 'X' atmospheres (technical) (where 'X' is the number of atmospheres (technical) to convert to megapascals). In order to convert a value from atmospheres (technical) to megapascals (from at to MPa) simply type the number of at to be converted to MPa and then click on the 'convert' button.