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