Use this free online gallons to liters converter to quickly convert gal to L. Simply enter the value in US gallons, and the tool will instantly display the equivalent volume in liters.
| US Gallons | Liters |
|---|
Uses the US liquid gallon (1 gal = 3.785412 L). UK Imperial gallons differ (1 gal = 4.546 L).
How to Convert Gallons to Liters
Gallons belong to the US customary system, while liters belong to the metric system. To convert a value from US gallons to liters, multiply the number of gallons by 3.785412.
Formula: L = gal × 3.785412
Example: Convert 5 gal to liters. 5 gal × 3.785412 = 18.927 L So, 5 US gallons is equal to approximately 18.93 liters.
What is a Gallon?
A gallon (gal) is a unit of volume used mainly in the United States. One US liquid gallon equals exactly 3.785411784 liters. Note that the UK (Imperial) gallon is different and larger, equal to about 4.546 liters — this converter uses the US gallon standard.
What is a Liter?
A liter (L) is a unit of volume in the metric system, equal to 1,000 cubic centimeters. It is widely used around the world to measure liquid volumes such as fuel, beverages, and cooking ingredients.
Gallon to Liter Relationship
1 US gal = 3.785412 L 1 L = 0.264172 US gal
Since gallon definitions differ by country, always check whether US or Imperial gallons are required for your conversion.
Gal to L Conversion Table
| US Gallons (gal) | Liters (L) |
|---|---|
| 1 gal | 3.785 L |
| 2 gal | 7.571 L |
| 5 gal | 18.927 L |
| 10 gal | 37.854 L |
| 20 gal | 75.708 L |
| 50 gal | 189.271 L |
| 100 gal | 378.541 L |
Solved Examples
Example 1: Convert 15 gal to liters. 15 × 3.785412 = 56.781 L
Example 2: Convert 8 gal to liters. 8 × 3.785412 = 30.283 L
Example 3: Which is more, 4 gallons or 10 liters? 4 gal = 15.14 L, so 4 gallons is more than 10 liters.
Frequently Asked Questions
There are approximately 3.785412 liters in 1 US gallon.
Multiply the gallon value by 3.785412 to get the equivalent volume in liters.
No, a US gallon (3.785 L) is smaller than a UK Imperial gallon (4.546 L). Always confirm which standard you need.
Gallons are mainly used in the United States for fuel, milk, and beverage volumes, while most of the world uses liters.