Please provide values below to convert gallon [gal] to liter [L], or vice versa.
Definition: A gallon is a unit of volume. This site uses the US liquid gallon (3.78541 liters); the UK imperial gallon (4.54609 liters) is a separate, larger unit.
History/origin: Historically, the gallon was based on the volume of wine or ale casks, with several competing regional definitions before standardization.
Current use: The gallon is used in the United States for fuel and liquid measurement, and in the United Kingdom for fuel-economy figures (miles per imperial gallon).
Definition: A liter is a metric unit of volume, equal to one cubic decimeter, or 0.001 cubic meters.
History/origin: The liter was introduced in France as part of the original metric system in the 1790s.
Current use: The liter is used worldwide for measuring liquids such as fuel, beverages, and cooking ingredients — everywhere except the United States, where gallons and cups dominate.
| Gallon [gal] | Liter [L] |
|---|---|
| 1 gal | 3.78541 L |
| 2 gal | 7.57082 L |
| 5 gal | 18.92705 L |
| 10 gal | 37.8541 L |
| 20 gal | 75.7082 L |
| 50 gal | 189.2705 L |