How Many Liters in a Gallon?
There are 3.785 liters in a US gallon (exactly 3.785411784 L). A UK gallon is 4.546 L (exactly 4.54609 L). 1 liter = 0.264 US gallon.
Gallons to liters
| Gallons | Liters |
|---|---|
| ½ | 1.893 |
| 1 | 3.785 |
| 2 | 7.571 |
| 5 | 18.927 |
| 10 | 37.854 |
| Liters | US gallons |
|---|---|
| 1 | 0.264 |
| 2 | 0.528 |
| 4 | 1.057 |
| 20 | 5.283 |
US vs UK gallon in liters
The US gallon is defined as 231 cubic inches, which is exactly 3.785411784 liters. The UK gallon is defined in law as exactly 4.54609 litres, about 20% more, so the same "gallon" on a British recipe or fuel pump is 1.201 US gallons. One liter is about 1.057 US quarts, or 4.23 US cups.
Worked example: a 20-liter water jug
20 ÷ 3.785411784 = 5.283, so a 20-liter jug holds a little over 5 US gallons. In UK gallons it is 4.40. For cups and milliliters, use cups to ml.
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Frequently asked questions
Is a gallon bigger than 4 liters?
A US gallon (3.785 L) is smaller than 4 L; a UK gallon (4.546 L) is bigger.
How many liters in a half gallon?
1.893 L (US).
How many 1-liter bottles make a gallon?
About 3.8 (US), or 4.5 (UK).