Liters to Gallons Calculator
Convert liters to US gallons instantly.
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Enter your values and click Calculate
How It Works
The US liquid gallon is defined as exactly 3.785411784 liters. To convert liters to US gallons, the calculator divides by this value — or equivalently, multiplies by the reciprocal 0.264172. So for any volume V in liters: gallons = V × 0.264172. The conversion factor comes from the relationship 1 US gallon = 231 cubic inches, combined with the SI definition of 1 inch = 2.54 cm exactly. The UK imperial gallon is a different unit equal to 4.54609 liters, giving a smaller gallon-per-liter factor of approximately 0.2200. This calculator uses the US gallon only. Results are returned to four decimal places for precision.
Examples
Full Gas Tank
A car with a 50-liter fuel tank.
Result: 50 liters equals approximately 13.209 gallons.
Water Bottle
A standard 1-liter water bottle.
Result: 1 liter equals approximately 0.2642 gallons.
Large Container
Converting 100 liters to gallons.
Result: 100 liters equals approximately 26.417 gallons.
Frequently Asked Questions
How many gallons are in a liter?
One liter equals approximately 0.264172 US liquid gallons.
Is this US gallons or imperial gallons?
This calculator uses US liquid gallons. The US gallon is 3.78541 liters, while the imperial (UK) gallon is 4.54609 liters.
Why is this useful for fuel costs?
Fuel prices in metric countries are listed per liter, while US prices are per gallon. Converting lets you directly compare fuel costs when traveling internationally.