Type a number of liters and this converter shows the answer in US gallons instantly (1 L = 0.264172 gal). Below the converter you will find a ready-made L to gal table, and further down the formula with a worked example.
Fuel is sold by the liter in most countries and by the gallon in the United States. The conversion is used to compare petrol prices abroad, size a fuel tank (a 50 L tank holds 13.2 US gallons), work out aquarium or water heater capacity, and follow paint or garden chemical instructions. UK readers should note that the imperial gallon is bigger; open the To list to choose UK gallons.
How to use the Liters to Gallons tool
- Enter the value in liters in the Value box. Decimals such as 25.5 are fine.
- The result in US gallons appears straight away, rounded to six significant digits.
- Check the formula line under the result to see exactly how it was calculated.
- Press ⇄ to convert US gallons back to liters, or pick any other unit from the lists.
- Use Copy result, or look up common values in the conversion table.
Why use ToolOrca Liters to Gallons
- Exact factor: 1 L = 0.264172 gal
- Conversion table: L to gal
- Formula and worked example included
- Instant result as you type
- Converts to every other volume unit too
- Free, private and works offline
How to convert liters to US gallons
A liter is one cubic decimeter, or 1,000 cubic centimeters. One US liquid gallon is 231 cubic inches, which is exactly 3.785411784 liters. So 1 L = 0.264172052 gal, and 1 gal = 3.785411784 L exactly.
To convert liters to US gallons, divide the number of liters by 3.785411784. Multiplying by 0.264172 gives the same answer to six significant digits.
Worked example: 50 L ÷ 3.785411784 = 13.2086 gal.
Quick mental math for L to gal
Divide by 4 and add 5%: 40 L ÷ 4 = 10, plus 0.5 = 10.5 gal (exact 10.57 US gal). For UK gallons divide by 4.5 instead.
Need the opposite direction? Use the US gallons to liters converter, or switch units with the ⇄ button above.
Frequently asked questions
How many US gallons is 1 L?
1 L is 0.264172 gal (1 ÷ 3.785411784 = 0.264172).
How many US gallons is 20 L?
20 L is 5.28344 gal (20 ÷ 3.785411784 = 5.28344).
How many US gallons is 50 L?
50 L is 13.2086 gal (50 ÷ 3.785411784 = 13.2086).
What is the formula to convert liters to US gallons?
To convert liters to US gallons, divide the number of liters by 3.785411784. Multiplying by 0.264172 gives the same answer to six significant digits. To go the other way, use the US gallons to liters converter.