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