Cubic millimeters to fluid drachms conversion calculator shown above calculates how many fluid drachms are in 'X' cubic millimeters (where 'X' is the number of cubic millimeters to convert to fluid drachms). In order to convert a value from cubic millimeters to fluid drachms (from mm³ to fl drc) simply type the number of mm³ to be converted to fl drc and then click on the 'convert' button.