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