Liters to Gallons Converter

The converter above is already set to liters and gallons, so you only need to enter your number. The result updates as you type, and nothing is sent anywhere.

1. Type your value in the Value box, for example 10. Decimals and negative numbers are accepted.
2. Check that From shows liters and To shows gallons. Both menus can be changed if you need a different pair.
3. Read the answer in the large result box. The note under it shows the exact factor used for one liter.
4. Press Copy result to put the answer on your clipboard, or Swap units to convert in the opposite direction.
5. Look at In every unit on the right to see the same amount in all the other volume units.

One liter is about 0.264172 gallons, so the formula is gallons = liters x 0.264172. Going the other way, one gallon is about 3.78541 liters. A liter is 1,000 milliliters, the volume of a cube 10 centimeters on each side. A US gallon is exactly 3.785411784 liters, roughly 17 percent smaller than the imperial gallon of 4.546 liters.

Worked examples with the same factor:

• 10 liters: 10 x 0.264172 = 2.64172 gallons
• 25 liters: 25 x 0.264172 = 6.6043 gallons
• 100 liters: 100 x 0.264172 = 26.4172 gallons

Divide by 3.8: 40 liters is about 10.5 gallons.

To check the converter by hand, take 25 liters and apply the rule once: the result should be 6.6043 gallons. If you go back again with the reverse factor 3.78541 you land on 25 liters, which confirms that the two directions agree. Rounding the factor to fewer digits for mental math gives a result that is close but not identical, so use the tool when the last digits matter.

These reference values come from the same factor the converter uses, so they match what you see above. Use the table for common amounts, and the converter for anything else.

Volume units are the most confusing family because the same names mean different amounts in different countries. The US customary system and the British imperial system both use gallons, pints and fluid ounces, but they are not equal, and neither matches the metric cup used in many recipes. This converter uses US customary measures for gallons, cups, tablespoons, teaspoons and fluid ounces, and exact metric definitions for liters and milliliters.

Use the table as a sanity check rather than a substitute for the converter. A liter is a little more than a quart and a quarter of a US gallon, and a milliliter is a thousandth of a liter, so a result that is wildly different from those landmarks probably used the wrong unit. When a recipe matters, weigh the ingredient if the recipe gives a weight.

Fuel tank sizes, water tanks, aquariums and fuel economy figures compare liters with gallons.

Check which gallon, cup and ounce a source means. A US gallon is 3.785 liters and an imperial gallon is 4.546, and a fluid ounce is not the same as an ounce of weight. This converter uses US customary units for gallons, cups, tablespoons and teaspoons.

Related pages: Gallons to Liters Converter for the reverse direction, and the tablespoons to milliliters and milliliters to liters pages. For other volume units use the volume converter.

The page keeps no history, so each visit starts again from the defaults, 10 liters. Your numbers are processed by JavaScript in your own browser and are never sent to a server, which makes the converter safe for private figures such as medical, financial or work measurements.