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