Liters to Gallons: US vs Imperial, Explained
Volume conversions depend on which gallon is meant. One US liquid gallon is exactly 3.785411784 liters. The Imperial gallon used in the United Kingdom is a different, larger unit.
Worked example · Updated

Convert ten liters
Divide 10 by 3.785411784 to obtain about 2.64172052 US gallons. Rounded to five decimal places, that is 2.64172 US gal.
To convert US gallons to liters, multiply by 3.785411784. Keeping the direction visible helps avoid accidentally multiplying when you should divide.
US and Imperial gallons are different
One Imperial gallon is 4.54609 liters. A recipe, vehicle specification or container marked only ‘gallon’ can therefore be ambiguous when units cross regions. Look for US, Imperial or UK in the label.
A fluid ounce is also a volume unit; an ounce in a mass conversion is not interchangeable with it.
Convert a volume
The linked tool opens at 10 liters to US gallons. Confirm the selected unit label, change the value if necessary, then press Convert to reveal the result.
| Liters | US gallons |
|---|---|
| 1 | 0.264172 |
| 5 | 1.320860 |
| 10 | 2.641721 |
| 20 | 5.283441 |
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