This application help you to convert aviation fuel from and to any of this unit: Pounds, Us Gallon, Imperial Gallon, Liter, Kilograms. And also can help you to calculate your fuel consumption of your aircraft
Screen shot description:
First image = Main view
Second image = principal view for convert fuel
Third and fourth image = calculate your fuel consumption for a twin engine aircraft.
The last image = caculate you fuel consumption for a single engine aircraft.