US Gallons to Liters
One US gallon equals 3.785412 liters.
Liters = US gallons × 3.785411784
By Piero Nanni · Last checked
US Gallons to Liters Calculator
1 US Gallons = 3.785411784 Liters
How to Convert US Gallons to Liters
Formula:
Liters = US gallons × 3.785411784
Worked example:
20 US gallons × 3.785411784 = 75.7082 liters
US Gallons to Liters Conversion Table
| gal | l |
|---|---|
| 1 | 3.7854 |
| 1.5 | 5.6781 |
| 2 | 7.5708 |
| 2.5 | 9.4635 |
| 3 | 11.3562 |
| 4 | 15.1416 |
| 5 | 18.9271 |
| 6 | 22.7125 |
| 7 | 26.4979 |
| 7.5 | 28.3906 |
| 8 | 30.2833 |
| 9 | 34.0687 |
| 10 | 37.8541 |
| 12 | 45.4249 |
| 15 | 56.7812 |
| 20 | 75.7082 |
| 25 | 94.6353 |
| 30 | 113.5624 |
| 40 | 151.4165 |
| 50 | 189.2706 |
| 60 | 227.1247 |
| 70 | 264.9788 |
| 75 | 283.9059 |
| 80 | 302.8329 |
| 90 | 340.6871 |
| 100 | 378.5412 |
| 150 | 567.8118 |
| 200 | 757.0824 |
| 250 | 946.3529 |
About This Conversion
US gallons to liters is needed for fuel economy, tank capacities and bulk liquids in any specification written for the American market. One US gallon is exactly 3.785411784 liters, a value that descends from the old English wine gallon of 231 cubic inches.
The imperial gallon still used in the UK for some purposes is a different unit at 4.54609 L, about 20 percent larger. That gap is why US and UK miles-per-gallon figures for the same car differ noticeably even though both are quoted as "mpg".
Frequently Asked Questions
How many liters are in a US gallon?
Exactly 3.785411784 liters, normally quoted as 3.785 L.
How many liters is 15 US gallons?
15 US gallons is 56.78 liters, a typical car fuel tank.
Is a UK gallon the same as a US gallon?
No. An imperial gallon is 4.546 L against the US gallon at 3.785 L, roughly 20 percent larger.
Why are US and UK mpg figures different?
Because the gallon differs. The same car scores about 20 percent higher mpg when measured in imperial gallons.