Gallons to Liters Converter
Convert US gallons (gal) to liters (L). One US gallon equals 3.78541 liters, so multiply a value in US gallons by 3.78541 to get liters.
Formula: multiply the source value by 3.78541178
Quick Conversions
About this tool
The US liquid gallon is 231 cubic inches, exactly 3.785411784 liters. A liter is one cubic decimeter, or 1,000 cubic centimeters.
How to use it
- Type a value in US gallons in the first field. The unit menus start on gal → L.
- Read the result in liters. It updates as you type; use Precision to choose how many decimals are shown.
- Press the swap button, or open the Liters to Gallons converter, to convert liters back to US gallons.
L = gal × 3.785411784
gal = L ÷ 3.785411784
Examples
1 gal to L
1 gal × 3.78541 = 3.78541 L.
5 gal to L
5 gal × 3.78541 = 18.9271 L.
15 gal to L
15 gal × 3.78541 = 56.7812 L.
US gallons to liters conversion table
| US gallons (gal) | Liters (L) |
|---|---|
| 1 | 3.78541 |
| 2 | 7.57082 |
| 3 | 11.3562 |
| 4 | 15.1416 |
| 5 | 18.9271 |
| 10 | 37.8541 |
| 15 | 56.7812 |
| 20 | 75.7082 |
| 25 | 94.6353 |
| 50 | 189.271 |
| 100 | 378.541 |
| 250 | 946.353 |
| 500 | 1,892.71 |
| 1,000 | 3,785.41 |
Liters to US gallons (reverse)
| Liters (L) | US gallons (gal) |
|---|---|
| 1 | 0.264172 |
| 5 | 1.32086 |
| 10 | 2.64172 |
| 50 | 13.2086 |
| 100 | 26.4172 |
FAQ
How many liters are in one US gallon?
One US gallon is 3.78541 liters. The unrounded factor is 3.785411784.
How do I convert liters back to US gallons?
Divide by 3.78541, or multiply by 0.264172. For example, 10 L is 2.64172 gal.
How many liters are in an imperial gallon?
Exactly 4.54609 L. This converter uses the US gallon, so multiply by 4.54609 yourself if your figure is in UK gallons.
Is the conversion exact?
Yes, before rounding. The US gallon is defined as exactly 231 cubic inches (3.785411784 L), and the quart, pint, cup, and fluid ounce are exact fractions of it.