Liters to Gallons Converter
Convert liters to gallons instantly. Supports US and Imperial gallons in both directions, with the exact conversion factors, worked examples and a reference chart.
Updated 2026-06-14 · Free · No sign-up · Runs privately in your browser
Show the formula & steps
How the Liters to Gallons Converter Works
This converter switches between liters and gallons in both directions, and handles both the US gallon and the Imperial (UK) gallon. Enter a value, pick a direction, and the result updates instantly with the exact factor shown.
The Formula
The conversion depends entirely on which gallon you use:
US gallons = liters ÷ 3.785411784 Imperial gallons = liters ÷ 4.54609
To convert the other way, multiply instead of divide. A US gallon is defined as exactly 231 cubic inches, which works out to 3.785411784 liters. The Imperial gallon was historically defined by the volume of 10 pounds of water and equals 4.54609 liters.
Worked Example
Convert 10 liters to US gallons:
- 10 ÷ 3.785411784 = 2.642 US gallons
Convert 10 liters to Imperial gallons:
- 10 ÷ 4.54609 = 2.200 Imperial gallons
The same 10 liters reads differently depending on the gallon system, which is why mixing them up causes 20% errors.
US vs Imperial Gallons
| Liters | US gallons | Imperial gallons |
|---|---|---|
| 1 | 0.264 | 0.220 |
| 5 | 1.321 | 1.100 |
| 10 | 2.642 | 2.200 |
| 20 | 5.283 | 4.399 |
| 50 | 13.209 | 10.998 |
When to Use Each Gallon
Use the US gallon for fuel economy, recipes and product sizes in the United States. Use the Imperial gallon in the UK and some Commonwealth countries. Fuel-economy figures in particular look very different: 40 miles per US gallon is about 48 miles per Imperial gallon, even though nothing about the car changed.
Frequently asked questions
How many liters are in a gallon?+
A US gallon is exactly 3.785411784 liters, while an Imperial (UK) gallon is 4.54609 liters. The two differ by about 20%, so always confirm which gallon you mean before converting.
How do I convert liters to US gallons?+
Divide the number of liters by 3.785411784. For example, 10 liters ÷ 3.785411784 = 2.642 US gallons. To go the other way, multiply gallons by 3.785411784.
What is the difference between US and Imperial gallons?+
An Imperial gallon (4.546 L) is larger than a US gallon (3.785 L) by roughly 20%. The US gallon is used in the United States, while the Imperial gallon is used in the UK and some Commonwealth countries.
How many gallons is 5 liters?+
5 liters equals about 1.321 US gallons or 1.100 Imperial gallons. Divide 5 by 3.785411784 for US gallons, or by 4.54609 for Imperial gallons.
Is a liter bigger than a gallon?+
No, a gallon is bigger than a liter. One US gallon holds about 3.79 liters and one Imperial gallon holds about 4.55 liters, so a single liter is roughly a quarter of a gallon.