What Is a Gallons to Liters Converter?
A Gallons to Liters Converter converts a liquid volume measured in US gallons into liters. It is useful for fuel, water, storage tanks, liquid products, vehicle specifications and everyday volume conversions.
This calculator uses the US liquid gallon. One US liquid gallon is exactly 3.785411784 liters. Enter the number of gallons and the calculator automatically gives you the equivalent volume in liters.
Gallons to Liters Formula
Liters = US Gallons × 3.785411784
Because the US liquid gallon is defined as exactly 231 cubic inches and the inch is exactly 25.4 millimeters, the resulting conversion of 3.785411784 liters per US gallon is exact.
How to Convert Gallons to Liters
Enter Gallons
Enter the number of US gallons you want to convert.
Multiply
Multiply the gallon value by 3.785411784.
Get Liters
The result is the equivalent liquid volume in liters.
Gallons to Liters Conversion Example
Suppose you want to convert 5 US gallons into liters. Multiply 5 by 3.785411784.
Example: Convert 5 Gallons to Liters
Therefore, 5 US gallons = 18.92705892 liters.
Gallons to Liters Conversion Table
The following table provides quick conversions for common US gallon values.
| US Gallons (gal) | Liters (L) |
|---|---|
| 1 gal | 3.785411784 L |
| 2 gal | 7.570823568 L |
| 3 gal | 11.356235352 L |
| 5 gal | 18.92705892 L |
| 10 gal | 37.85411784 L |
| 20 gal | 75.70823568 L |
| 25 gal | 94.6352946 L |
| 50 gal | 189.2705892 L |
| 100 gal | 378.5411784 L |
| 500 gal | 1892.705892 L |
How Many Liters Are in One Gallon?
One US liquid gallon contains exactly 3.785411784 liters. For quick everyday estimates, this is often rounded to 3.785 liters or about 3.79 liters.
1 US Gallon
One US liquid gallon equals exactly 3.785411784 liters, or 231 cubic inches.
1 Liter
One liter equals approximately 0.264172052 US liquid gallons.
How to Convert Liters Back to Gallons
To convert liters to US gallons, divide the number of liters by 3.785411784.
US Gallons = Liters ÷ 3.785411784
For example, 10 liters is approximately 2.64172 US gallons.
US Gallons vs Imperial Gallons
The word “gallon” can refer to different units. This converter uses the US liquid gallon, which is not the same size as the Imperial gallon used in some contexts.
US Liquid Gallon
1 US liquid gallon equals exactly 3.785411784 liters.
Imperial Gallon
1 Imperial gallon equals exactly 4.54609 liters, so it is larger than a US liquid gallon.
Always check whether a source means US gallons or Imperial gallons. Using the wrong gallon type can create a significant difference in the converted liter value.
US Gallon and Imperial Gallon Comparison
| Measurement | Liters |
|---|---|
| 1 US Liquid Gallon | 3.785411784 L |
| 1 Imperial Gallon | 4.54609 L |
| 5 US Gallons | 18.92705892 L |
| 5 Imperial Gallons | 22.73045 L |
| 10 US Gallons | 37.85411784 L |
| 10 Imperial Gallons | 45.4609 L |
Common Uses for Gallons to Liters Conversion
Gallons-to-liters conversion is useful when comparing volume measurements from countries or products that use different measurement systems.
- Vehicle fuel tank capacity
- Fuel consumption calculations
- Water tanks and containers
- Aquariums and liquid storage
- Agriculture and irrigation
- Industrial liquid measurements
- Product specifications
- Travel and international comparisons
Common Gallons to Liters Conversion Mistakes
- Confusing US liquid gallons with Imperial gallons.
- Dividing instead of multiplying when converting US gallons to liters.
- Using an overly rounded conversion factor when precise results are required.
- Confusing gallons with quarts or other volume units.
- Forgetting to identify which gallon standard is being used.
Gallons to Liters Converter FAQs
To convert US liquid gallons to liters, multiply the number of gallons by 3.785411784.
One US liquid gallon is exactly equal to 3.785411784 liters.
Five US liquid gallons equals 18.92705892 liters.
Ten US liquid gallons equals 37.85411784 liters.
No. One US liquid gallon equals 3.785411784 liters, while one Imperial gallon equals 4.54609 liters.
Divide the number of liters by 3.785411784. For example, 10 liters is approximately 2.64172 US gallons.