Fluid ounces (US labeling) to fluid drachms conversion calculator shown above calculates how many fluid drachms are in 'X' fluid ounces (US labeling) (where 'X' is the number of fluid ounces (US labeling) to convert to fluid drachms). In order to convert a value from fluid ounces (US labeling) to fluid drachms (from fl oz to fl drc) type the number of fl oz to be converted to fl drc and then click on the 'convert' button.