How many liters are in one US gallon?
One US gallon is 3.785 l.
US Gallons to Liters
Type a value to convert it from US gallons to liters. One gal equals 3.785 l.
Result
US gallons and liters, side by side
One US gallon is 3.785 l. In the other direction, one liter is 0.2642 gal.
The factor is exact rather than rounded: imperial and US units have been defined from the metric ones since 1959, so the conversion introduces no error of its own. What you see below is arithmetic, not an approximation.
The US gallon is exactly 231 cubic inches, about 3.785 liters, and prices gas and milk in the United States. The imperial gallon used in the United Kingdom is larger, about 4.546 liters, so a gallon is not the same on both sides of the Atlantic.
The liter is the volume of a cube 10 centimeters on each side, one cubic decimeter. Drinks, fuel and engine size are measured in liters in most of the world, and a liter of water weighs about one kilogram.
| Gallon (US) | Liter |
|---|---|
| 1 | 3.78541 |
| 2 | 7.57082 |
| 5 | 18.9271 |
| 10 | 37.8541 |
| 20 | 75.7082 |
| 50 | 189.271 |
Frequently asked questions
How do I convert liters back to US gallons?
One liter is 0.2642 gal. The tool above converts in both directions.
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