Gallons to Liters Converter
Convert any volume from US gallons to liters using the exact conversion factor: 1 US gallon = 3.785411784 liters. This converter also displays milliliters, quarts, and cups for kitchen and everyday use.
The US gallon is a unit of volume in the United States customary system, while the liter is the standard metric unit for volume. The US liquid gallon is defined as exactly 231 cubic inches, which equals 3.785411784 liters. Note: the US gallon is different from the Imperial (UK) gallon, which is larger at 4.54609 liters.
Common Gallon to Liter Conversions:
| US Gallons | Liters | Context |
|---|---|---|
| 0.25 gal | 0.946 L | 1 quart |
| 0.5 gal | 1.893 L | Half gallon |
| 1 gal | 3.785 L | Base conversion |
| 2 gal | 7.571 L | Large jug |
| 5 gal | 18.927 L | Water cooler bottle |
| 10 gal | 37.854 L | Fish tank |
| 15 gal | 56.781 L | Car fuel tank (small) |
| 20 gal | 75.708 L | Car fuel tank (large) |
US vs Imperial Gallons: A US gallon (3.785 L) is about 83% of an Imperial gallon (4.546 L). This difference matters when reading fuel economy figures from different countries. A car rated at 30 mpg (US) would be rated at about 36 mpg (Imperial).