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