Gills (US) to gills (UK) conversion calculator shown above calculates how many gills (UK) are in 'X' gills (US) (where 'X' is the number of gills (US) to convert to gills (UK)). In order to convert a value from gills (US) to gills (UK) just type the number of gills (US) to be converted to gills (UK) and then click on the 'convert' button.