Liters to gallons volume units conversion factors are listed below. To find out how many gallons in liters, multiply by the conversion factor or use the converter below. 1 Liter = 0.264172051 Gallon [Fluid, US]. Liter is volume unit which equals to 1 cubic decimeter. It is widely used in daily life to measure the fluids, gasoline, etc. 1 liter of water has a mass about 1 kilogram. The abbreviation is l. Gallon is an imperial and US customary unit.