Liters to Gallons
Convert liters to US or imperial gallons. The two gallons differ by about twenty percent, so this converter keeps them as separate units rather than guessing.
gal (US) = L ÷ 3.785412
NIST SP 811 (2008), Appendix B.8 — gallon (U.S.) (gal) to liter (L) = 3.785 412 E+00
There is no such thing as "the" gallon. A US gallon is 3.785412 liters while an imperial gallon, still used in the United Kingdom and Canada, is 4.54609 liters — about twenty percent larger. Quoting fuel economy or a recipe without saying which one you mean is the single most common mistake in this category, so both are offered here as distinct units.
How it is calculated
gal (US) = L ÷ 3.785412
The US gallon is defined as 231 cubic inches, which works out to the factor NIST publishes. The imperial gallon has an independent definition of exactly 4.54609 liters and is selectable in the unit list.
Source: NIST SP 811 (2008), Appendix B.8 — gallon (U.S.) (gal) to liter (L) = 3.785 412 E+00
Common values
| liters | US gallons |
|---|---|
| 1 | 0.26417204 |
| 2 | 0.52834407 |
| 5 | 1.3208602 |
| 10 | 2.6417204 |
| 20 | 5.2834407 |
| 40 | 10.566881 |
| 50 | 13.208602 |
| 60 | 15.850322 |
| 100 | 26.417204 |
| 200 | 52.834407 |
Questions people ask
- How different are US and imperial gallons?
- An imperial gallon is 4.54609 liters against 3.785412 for the US gallon, so it is about 20.1 percent larger. A car doing 30 miles per US gallon does 36 miles per imperial gallon without burning a drop less fuel.
- How many liters in a US gallon of fuel?
- 3.785412 liters. Filling a 15 gallon tank therefore takes 56.78 liters, which is the number that will appear on a European pump.
- Is a fluid ounce the same in both systems?
- No. A US fluid ounce is 29.57353 milliliters and there are 128 to the US gallon, while the imperial fluid ounce is about 28.41 milliliters with 160 to the imperial gallon. This converter uses the US fluid ounce.
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