Convert US Gallon to Liter
Convert US Gallon to Liter instantly. 1 gal = 3.785412 L. Formula, worked examples and a quick reference table.
Last updated
One us gallon equals 3.785412 liters. To convert any number of us gallons to liters, multiply by 3.78541178.
The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.
US Gallon to Liter formula
To go the other way, use us gallon = liter ÷ 3.78541178.
About these units
A US gallon is 231 cubic inches, about 3.785 litres. It is noticeably smaller than the imperial gallon, which is a frequent source of fuel-economy confusion.
A litre is exactly one cubic decimetre, or 1,000 cubic centimetres. One litre of water weighs almost exactly one kilogram, which is not a coincidence.
US Gallon to Liter conversion table
| US Gallon | Liter |
|---|---|
| 1 gal | 3.7854 L |
| 2 gal | 7.5708 L |
| 3 gal | 11.3562 L |
| 5 gal | 18.9271 L |
| 10 gal | 37.8541 L |
| 20 gal | 75.7082 L |
| 25 gal | 94.6353 L |
| 50 gal | 189.2706 L |
| 100 gal | 378.5412 L |
| 250 gal | 946.3529 L |
| 500 gal | 1,892.7059 L |
| 1,000 gal | 3,785.4118 L |
Frequently asked questions
How many liters are in a us gallon? +
There are 3.785412 liters in one us gallon.
What is 10 gal in L? +
10 gal equals 37.8541 L. Multiply 10 by 3.78541178.
How do I convert liter back to us gallon? +
Use us gallon = liter ÷ 3.78541178. The converter above handles both directions, or see our dedicated Liter to US Gallon page.