Foot-poundals to millijoules conversion calculator above calculates how many millijoules are in 'X' foot-poundals (where 'X' is the number of foot-poundals to convert to millijoules). In order to convert a value from foot-poundals to millijoules (from ft pdl to mJ) simply type the number of ft pdl to be converted to mJ and then click on the 'convert' button.