Convert US gallons to liters
Enter a value in US gallons to convert it to liters.
US gallons to liters reference
| US gallons | liters |
|---|---|
| 1 gal | 3.7854 l |
| 2 gal | 7.5708 l |
| 5 gal | 18.9271 l |
| 10 gal | 37.8541 l |
| 25 gal | 94.6353 l |
| 50 gal | 189.2705 l |
| 100 gal | 378.541 l |
The conversion factor
One US gallon is 3.78541 liters. So to convert, multiply your figure in US gallons by 3.78541. To go the other way, multiply liters by 0.26417218, or use the liters to US gallons converter.
Doing it in your head
For a quick estimate, round the factor: roughly "times 4". Use the exact converter above when the number matters.
Where this conversion comes up
Cooking and baking (especially US vs metric recipes), fuel, and container sizes.
See the common unit conversions cheat sheet for the factors worth memorising.
Related tools
Frequently asked questions
How many liters are in a US gallon?
1 US gallon = 3.78541 liters.
What is the formula to convert US gallons to liters?
Multiply the number of US gallons by 3.78541. To go back the other way, multiply liters by 0.26417218.
What is 10 US gallons in liters?
10 US gallons = 37.8541 liters. The reference table below lists more common values.
Is this converter accurate?
It uses the internationally defined conversion factors and computes at full floating-point precision, then rounds only the displayed result. For everyday purposes it is exact; for legal, engineering or scientific work, confirm the required number of significant figures.
Does it work offline?
Yes. The conversion runs in your browser with no server call, so it keeps working with no connection, and nothing you enter is uploaded.
Last reviewed: September 2026. Figures and formulas are checked against their published sources; see the site's data notes.