UtilityBaseCalculators
Gallons to Liters Converter
Convert US gallons to liters and back — edit either box, both update.
Updated July 10, 2026
How to use the gallons to liters converter
- 1Enter a value in US gallons.
- 2Read the equivalent in liters.
- 3Or type a liters value to convert the other way.
- 4Remember US gallons differ from imperial.
Common uses
- Converting fuel volume or economy
- Following a recipe in another unit
- Aquarium and tank volumes
- Comparing product sizes across regions
Frequently asked questions
How many liters is 1 gallon?
One US gallon is 3.785411784 liters. To convert US gallons to liters, multiply by 3.7854; to convert liters to gallons, divide by it. An imperial (UK) gallon is larger, about 4.546 liters.
What's the difference between US and imperial gallons?
A US gallon is 3.785 liters; an imperial (UK) gallon is about 4.546 liters, roughly 20% larger. This tool uses US gallons, which matters a lot for fuel economy comparisons between countries.
Is this for liquid or dry gallons?
The liquid US gallon, the common one for fuel, milk, and beverages. The rarely-used US dry gallon is different (about 4.405 liters) and isn't used here.
About this tool
The gallons to liters converter turns US gallons into liters and liters into US gallons instantly. One US gallon is 3.785411784 liters, so gallons convert to liters by multiplying by about 3.7854. Edit either field and the other updates live, with a quick-reference table. Note the key gotcha: a US gallon (3.785 L) is smaller than an imperial UK gallon (about 4.546 L), so use the right one for fuel economy and recipes. Everything is calculated in your browser.
Like most tools on UtilityBase, the gallons to liters converter runs entirely in your browser — nothing you enter is uploaded or stored on a server. It's free to use with no account required. Browse more calculators here.
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