Liters to Gallons Converter
Convert liters to gallons for fuel, recipes, and tanks. Enter liters to get US gallons, imperial (UK) gallons, quarts, and milliliters at once.
Example: with Liters 10 → US gallons: 2.6417 US gal.
- Imperial gallons2.1997 imp gal
- In US quarts10.567 US qt
- In milliliters10,000 mL
Computed by the calculator below using its default values. Change any input to see your own numbers.
1 US gallon = 3.785411784 L, so 1 liter is about 0.2642 US gallon. An imperial gallon is larger at 4.54609 L.
Liters to gallons
A liter is a metric volume; a gallon is US or imperial. Since a US gallon is 3.785411784 liters by definition, one liter is about 0.2642 US gallon, and you divide liters by 3.7854 to convert. Ten liters is about 2.64 US gallons; a 45-liter fuel tank is roughly 11.89 US gallons.
The reverse shortcut is handy too: multiply liters by 0.2642 for a quick US-gallon estimate, or by 0.22 for imperial gallons.
Two gallons to choose from
The US gallon (3.785 L) and the imperial (UK) gallon (4.546 L) are different sizes, so the same liters give different gallon counts. Ten liters is 2.64 US gallons but only 2.20 imperial gallons. This matters most for fuel economy and shipping, where a mislabeled gallon skews the math by about 20 percent.
Milliliters and quarts round out the picture: a liter is 1,000 mL and about 1.057 US quarts.
How it’s calculated
US gallons = liters ÷ 3.785411784. Imperial gallons = liters ÷ 4.54609. US quarts = liters ÷ 0.946352946. Milliliters = liters × 1000. Factors are NIST and UK standards.
Pure volume conversion; it does not account for temperature-driven expansion of the liquid.
Liters to US and imperial gallons
| Liters | US gallons | Imperial gallons |
|---|---|---|
| 1 | 0.2642 | 0.2200 |
| 5 | 1.3209 | 1.0998 |
| 10 | 2.6417 | 2.1997 |
| 20 | 5.2834 | 4.3994 |
| 45 | 11.8877 | 9.8986 |
| 50 | 13.2086 | 10.9985 |
1 US gallon = 3.785411784 L; 1 imperial gallon = 4.54609 L (NIST / UK).
Common mistakes
- Using imperial gallons where US gallons are meant, or the reverse — a 20 percent gap.
- Rounding 0.2642 to 0.25, which overstates US gallons by about 5 percent.
- Confusing liters with milliliters; a liter is 1,000 mL.
- Applying a liters-to-gallons factor to weight instead of volume.
Frequently asked questions
How many gallons is a liter?
About 0.2642 US gallon, or 0.22 imperial gallon. A US gallon is 3.785411784 liters, so one liter is that value divided into 1.
What is the formula for liters to gallons?
US gallons = liters ÷ 3.785411784. For imperial gallons, divide liters by 4.54609 instead.
How many gallons is 45 liters?
About 11.89 US gallons, or 9.90 imperial gallons. Divide 45 by 3.7854 for the US figure.
Why are US and imperial gallons different?
They are separate standards. The US gallon is 3.785 liters and the imperial gallon is 4.546 liters, so the imperial gallon is about 20 percent larger.