Foot-pounds force to millijoules converter on this page calculates how many millijoules are in 'X' foot-pounds force (where 'X' is the number of foot-pounds force to convert to millijoules). In order to convert a value from foot-pounds force to millijoules (from ft lbf to mJ) simply type the number of ft lbf to be converted to mJ and then click on the 'convert' button.