convert gallons to liters
1 gal = 3.785 L 2 = 7.571 3 = 11.356 4 = 15.142 5 = 18.927 6 = 22.712 7 = 26.498 8 = 30.283 9 = 34.069 10 = 37.854. 1 gallon (gal) = 3.785411784 litres (L) = 231 cubic inches = 4 qt = 128 fl oz U.S. liquid gallon is defined as 231 cubic inches and is equal to 3.785411784 litres or about 0.13368 cubic feet. A liter) is defined as one cubic decimetre (1 L = 1 cubic dm). Hence 1 L = 0.001 cubic m. The word litre came from an older French unit, the litron, the name came from Greek via Latin. The metric system used litre as a volume unit.