Formula
The gallon is tied to the cubic inch, and the inch is tied to the meter:
liters = US gallons × 3.785411784
The gallon is the US liquid gallon of 231 cubic inches, not the imperial gallon.
Assumptions
- The value can be zero and cannot be negative.
- The result is shown with up to six decimal places.
Worked example
1 US gallon equals 3.785412 liters.
Input definitions
- US gallons
- Liquid gallons of 231 cubic inches.
Limitations
A US dry gallon is a different volume and is not used here.
Questions
How many liters are in a gallon?
Exactly 3.785411784 liters for the US liquid gallon.
Is a UK gallon the same?
No. The imperial gallon is larger, about 4.55 liters.