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