How to convert US gallons to liters
One US gallon equals 3.785412 liters. To convert, multiply the number of US gallons by 3.785412:
Mental-math shortcut: Multiply US gallons by 3.8 for a close estimate: 5 gal ≈ 19 L (exact: 18.93 L).
Example
Convert 5 US gallons to liters: 5 gal × 3.785412 = 18.9271 L.
Gallons to Liters conversion chart
| Gallons (gal) | Liters (L) |
|---|---|
| 0.25 | 0.946353 |
| 0.5 | 1.8927 |
| 1 | 3.7854 |
| 2 | 7.5708 |
| 3 | 11.3562 |
| 4 | 15.1416 |
| 5 | 18.9271 |
| 10 | 37.8541 |
| 12 | 45.4249 |
| 15 | 56.7812 |
| 20 | 75.7082 |
| 50 | 189.27 |
| 100 | 378.54 |
What is a US gallon?
The US gallon (gal) is 128 US fluid ounces, or exactly 3.785411784 liters. It is used for fuel, milk and paint in the United States. The imperial (UK) gallon is about 20% larger at 4.54609 liters; this converter uses the US gallon.
What is a liter?
A liter (L) is 1,000 milliliters, the volume of a cube 10 cm on each side. Liters are used for drinks, fuel and engine size around the world. One liter is about 1.057 US quarts, a little more than a quart.
Converting the other way? Use the Liters to Gallons converter.
Frequently asked questions
How many liters is one US gallon?
One US gallon is 3.785412 liters.
How do I convert US gallons to liters?
Multiply the value in US gallons by 3.785412. For example, 5 gal × 3.785412 = 18.9271 L.
What is 10 gal in liters?
10 gal is 37.8541 liters.
How do I convert liters to US gallons?
Multiply liters by 0.264172 (or divide by 3.785412). You can also use our Liters to Gallons converter.
Is a UK gallon the same as a US gallon?
No. An imperial (UK) gallon is 4.54609 liters, about 20% more than a US gallon (3.785 liters).
Conversions use the internationally agreed definitions of each unit (for example, 1 inch = 2.54 cm exactly) and are rounded for display. Volume converters use US customary units unless stated otherwise.
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