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