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Free Liters to Gallons Converter

Convert liters to US gallons and back. Type in either box for an instant result. This tool uses US gallons — imperial gallons are larger.

1 L = 0.2642 gal

Pick any units and edit either box — it converts instantly in your browser.

Quick answer

To convert liters to US gallons, divide the number of liters by 3.785411784 (or multiply by 0.264172), because one US gallon is 3.785411784 liters. For example, 10 L ≈ 2.64 US gallons. A UK (imperial) gallon is larger, about 4.546 liters.

Formula & method

US gallons = liters ÷ 3.785411784
  • liters — volume in litres
  • 3.785411784 — litres in one US gallon

For imperial (UK) gallons, divide by 4.54609 instead.

Common liters to US gallons

Liters (L)US Gallons (gal)
1 L0.26 gal
3.785 L1.00 gal
5 L1.32 gal
10 L2.64 gal
20 L5.28 gal
50 L13.21 gal
100 L26.42 gal

Examples

Example 1: 1 liter
Input
1 L
Result
0.2642 US gal
Why
1 ÷ 3.785411784 = 0.264172.
Example 2: About one US gallon
Input
3.7854 L
Result
≈ 1 US gal
Why
3.785411784 L is exactly one US gallon.
Example 3: A 50-liter tank
Input
50 L
Result
13.209 US gal
Why
50 ÷ 3.785411784 = 13.209.

When to use this tool

  • Converting fuel volumes when driving or comparing economy figures.
  • Reading a recipe or container size in the other unit.
  • Sizing tanks, aquariums, or water usage.

Common mistakes

  • Mixing up US and imperial gallons. A US gallon is 3.785 L; a UK gallon is 4.546 L.
  • Using 4 liters per gallon as a shortcut — it’s close to the US gallon but off by about 5%.
  • Confusing dry and liquid gallons in the US system; this tool uses the liquid gallon.

Frequently asked questions

How do I convert liters to gallons?

Divide the liters by 3.785411784 for US gallons, or by 4.54609 for imperial (UK) gallons.

What’s the difference between US and imperial gallons?

A US gallon is about 3.785 liters, while an imperial (UK) gallon is about 4.546 liters — roughly 20% larger.

How many liters are in a US gallon?

Exactly 3.785411784 liters.

How do I convert gallons back to liters?

Multiply US gallons by 3.785411784, or type a value into the gallons box here.

Which gallon does this tool use?

The US liquid gallon. If you need imperial gallons, divide your liters by 4.54609 instead.

How do I compare fuel economy between liters per 100 km and miles per gallon?

They measure opposite things. MPG (higher is better) and L/100 km (lower is better) are inversely related. A vehicle with 25 mpg uses about 9.4 L/100 km.

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  • ✓ Formula and method shown above
Last updated: How we calculateReport a correctionDisclaimer

Provided “as is” for general information only — results may be inaccurate, so verify before you rely on them. No warranty; use at your own risk.

Built and reviewed by HIFreeTools against the formula shown above and any authoritative references cited on this page. See our methodology and editorial standards.

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