Millipascals to millibars converter on this page calculates how many millibars are in 'X' millipascals (where 'X' is the number of millipascals to convert to millibars). In order to convert a value from millipascals to millibars (from mPa to mbar) type the number of mPa to be converted to mbar and then click on the 'convert' button.