Answer: 12 Imperial gallons to liters = 54.55308 L. 12 US gallons to liters = 45.42494 liters. 12 US dry gallons to liters = 52.85878 L. In case of US liquid gallons, 12 gal to L = 45.42494 liters, and for UK gallons we get 12 gallon to liter = 54.55308 L. Finally, for US dry gallons, we note that twelve gallons to liter equal 52.85878 L.
