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