Gallons to Liters ConverterRight in Your Browser
Convert US gallons (gal) to liters (L). The US gallon (gal) is the American unit for fuel, milk and large liquids — about 3.79 liters. The liter (L) is the metric volume unit used worldwide for bottles, fuel and engine sizes. Everything is calculated locally in your browser — no server, and it works offline.
3.78541 L
in liters (liter)
To convert US gallons to liters, multiply the US gallon value by 3.78541.
Switch to Liters to GallonsGallons to Liters Chart
| US gallons (gal) | Liters (L) |
|---|---|
| 1 | 3.78541 |
| 2 | 7.57082 |
| 3 | 11.3562 |
| 4 | 15.1416 |
| 5 | 18.9271 |
| 10 | 37.8541 |
| 20 | 75.7082 |
| 50 | 189.271 |
| 100 | 378.541 |
Frequently Asked Questions
How many liters are in a US gallon?
One US gallon equals 3.78541 liters (1 gal = 3.78541 L). So to go from US gallons to liters, multiply the US gallon value by 3.78541.
What is the formula to convert US gallons to liters?
To convert US gallons to liters, multiply the US gallon value by 3.78541. For example, 10 gal is 37.8541 L.
What is 15 US gallons in liters?
15 US gallons — a typical car fuel tank — is 56.7812 liters. The converter above works for any value, entirely in your browser.
Is the US gallon to liter conversion exact?
The factor used here is the defined value: 1 gal = 3.785411784 L. Results are rounded to six significant digits for readability, so for high-precision work use the full factor.