Litres to US gallons converter
Type a number in either box to convert between litres and US gallons. It works both ways and nothing is sent anywhere.
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How many US gallons are in a litre?
To convert litres to US gallons, multiply by 0.26417205. One L is 0.26417205 US gal, and one US gal is 3.7854118 L, so to go the other way multiply US gallons by 3.7854118 or divide by 0.26417205. The factor is exact: the US liquid gallon is defined as 3.785411784 litres (231 cubic inches). Type a number in either box below and the other one updates at once.
How to convert litres and US gallons
1 L = 0.26417205 US gal, and 1 US gal = 3.7854118 L. The factor is exact: the US liquid gallon is defined as 3.785411784 litres (231 cubic inches).
One US gallon is exactly 3.785411784 litres, so a litre is 0.264172 US gallons. A quick check: four litres is a little over a US gallon. If your source is British or old Canadian, the gallon may be the imperial gallon of 4.54609 litres, which is about 20% larger.
It runs in your browser. Nothing you type is sent anywhere, and there is no sign-up.
Common values
These are the conversions people look up most often, worked out from the exact factor and rounded to six significant digits.
| Litres | equals | Us gallons | equals |
|---|---|---|---|
| 1 L | 0.264172 US gal | 1 US gal | 3.78541 L |
| 4 L | 1.05669 US gal | 4 US gal | 15.1416 L |
| 10 L | 2.64172 US gal | 10 US gal | 37.8541 L |
| 20 L | 5.28344 US gal | 20 US gal | 75.7082 L |
| 40 L | 10.5669 US gal | 40 US gal | 151.416 L |
| 50 L | 13.2086 US gal | 50 US gal | 189.271 L |
| 60 L | 15.8503 US gal | 60 US gal | 227.125 L |
| 100 L | 26.4172 US gal | 100 US gal | 378.541 L |
Where you meet it in Canada
Fuel in Canada is sold by the litre, but a US-built car's tank is listed in gallons, a US recipe or a pool product uses gallons, and a price of $3.50 a gallon in an American station is about $0.92 a litre. Check which gallon is meant: the US gallon is 3.785 L and the imperial gallon is 4.546 L. The US gallon is defined as 231 cubic inches, which gives the exact factor.
When to use it
- Comparing a US gas price per gallon with a Canadian price per litre
- Converting a fuel tank or paint quantity
- Reading a US recipe or a pool or garden product label
- Working out how much a US tank will hold in litres
Mistakes it helps you avoid
- Using the imperial gallon factor on a US figure, or the other way round.
- Comparing a US price per gallon with a Canadian price per litre without converting.
- Forgetting that a US quart is a quarter of a US gallon (0.946 L).
- Rounding 3.785 to 3.8 on large volumes.
The formula
One multiplication each way.
US gal = L × 0.26417205L = US gal × 3.7854118 (or US gal ÷ 0.26417205)
The factor is exact: the US liquid gallon is defined as 3.785411784 litres (231 cubic inches). The result is rounded for display only; the figure in the box keeps up to eight significant digits. Factors come from NIST SP 811 Appendix B.
Example: 50 L in US gallons
Convert 50 litres to US gallons.
- Factor1 L = 0.26417205 US gal
- Multiply50 × 0.26417205 = 13.2086
50 L = 13.2086 US gal
Check: 13.2086 ÷ 0.26417205 gives back 50.
Terms on this page
- US gallon
- A volume of 231 cubic inches, or exactly 3.785411784 litres.
- Litre
- One cubic decimetre, or 1,000 millilitres.
Common questions
How many US gallons are in one L?
One L is 0.26417205 US gal.
How many litres are in one US gal?
One US gal is 3.7854118 L.
Is the L to US gal factor exact?
The factor is exact: the US liquid gallon is defined as 3.785411784 litres (231 cubic inches).
Is a US gallon the same as a Canadian gallon?
No. A Canadian gallon was the imperial gallon (4.546 L). The US gallon is 3.785 L. Fuel in Canada is sold in litres.
How do I convert a US gas price per gallon to a price per litre?
Divide the price per gallon by 3.785. A price of $3.50 is $0.925 a litre.
Is anything I type sent to a server?
No. The conversion happens in your browser and nothing you enter leaves your device.
Where these numbers come from
- NIST — Guide for the Use of the International System of Units, Appendix B.8 (conversion factors) The exact definitions used here, such as 1 inch = 2.54 centimetres and 1 pound = 0.45359237 kilograms.
- Wikipedia — Gallon The US and imperial gallons and how they differ.
Last verified 2026-10-25 The method on this page is checked against the sources above at least once a year. Spotted something out of date? Tell us and we will fix it.
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