Millibars to kips per square inch converter on this page calculates how many kips per square inch are in 'X' millibars (where 'X' is the number of millibars to convert to kips per square inch). In order to convert a value from millibars to kips per square inch (from mbar to ksi) simply type the number of mbar to be converted to ksi and then click on the 'convert' button.