VolumeUS Gallons to liters
1 US gallon = 3.7854 liters.
1 US gallon = 3.7854 liters. Multiply by 3.7854.
Common amounts
| gal | L |
|---|---|
| 1 gal | 3.7854 L |
| 2 gal | 7.5708 L |
| 5 gal | 18.9271 L |
| 10 gal | 37.8541 L |
| 20 gal | 75.7082 L |
How it works
How to convert US gallons to liters
L = gal × 3.7854.
Worked examples: 10 US gallons = 37.854 liters; 100 US gallons = 378.54 liters.
About US gallons and liters
The US liquid gallon is 231 cubic inches, exactly 3.785411784 L. The imperial gallon is larger, 4.54609 L. A liter is 1,000 cubic centimeters.
When you'd convert US gallons to liters
Fuel and milk jugs: 10 US gallons is about 37.9 L.
Common mistake: US, UK and metric cups and spoons differ. Use the US measures here only for US recipes.
To go the other way, use the liters to US gallons converter.
The converter on this page works out the answer in your browser as you type, and shows the factor so you can check it by hand.
Questions
How do I convert US gallons to liters?
1 US gallon = 3.7854 liters. Multiply by 3.7854.
What does the Converter : Units app add?
The same conversion, plus history, a constants library, and the rest of the unit categories on the phone.