Grams per gallon (UK) to grams per liter conversion calculator shown above calculates how many grams per liter are in 'X' grams per gallon (UK) (where 'X' is the number of grams per gallon (UK) to convert to grams per liter). In order to convert a value from grams per gallon (UK) to grams per liter (from g/gal to g/L) just type the number of g/gal to be converted to g/L and then click on the 'convert' button.