Gallons (UK) to gills (US) converter above calculates how many gills (US) are in 'X' gallons (UK) (where 'X' is the number of gallons (UK) to convert to gills (US)). In order to convert a value from gallons (UK) to gills (US) simply type the number of gal to be converted to gills (US) and then click on the 'convert' button.