1 Gallons =
(rounded to 6 decimal places)
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A U.S. gallon is equal to 128 U.S. fluid ounces, or about 3.785 liters. It should not be confused with the imperial gallon used in the United Kingdom.
A liter is a metric system unit of volume. A liter is defined as the volume of a cube that is 10 centimeters on a side.
There are about 3.785 liters in a U.S. gallon.