How to convert gallons to liters
To convert gallons to liters, multiply by 3.785411784. Volume conversions help with recipes, fuel, beverages, aquariums and laboratory work. US customary units are used here.
Gallon to Liter conversion table
| Gallon (gal) | Liter (L) |
|---|---|
| 0.1 gal | 0.3785411784 L |
| 0.5 gal | 1.892705892 L |
| 1 gal | 3.785411784 L |
| 2 gal | 7.570823568 L |
| 3 gal | 11.356235352 L |
| 4 gal | 15.141647136 L |
| 5 gal | 18.92705892 L |
| 10 gal | 37.85411784 L |
| 20 gal | 75.70823568 L |
| 25 gal | 94.6352946 L |
| 50 gal | 189.2705892 L |
| 100 gal | 378.5411784 L |
| 500 gal | 1,892.705892 L |
| 1,000 gal | 3,785.411784 L |
About the units
Gallon (gal)
A US liquid gallon is defined as 231 cubic inches, exactly 3.785411784 liters.
Liter (L)
A liter equals one cubic decimeter (1,000 cm³) and is the common metric unit for drinks and fuel.
How to use this converter
- Type the number of gallons (gal) in the input box.
- The result in liters appears instantly — no button needed.
- See the same value in every other volume unit just below.
- Use “Swap units” to convert liters back to gallons.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many liters are in one gallon?
One gallon equals 3.785411784 liters. 3.785411784 is the exact factor used by this converter.
How do I convert gallons to liters?
Multiply the value in gallons by 3.785411784. To go the other way, multiply liters by 0.264172052358.
What is 10 gal in L?
10 gal = 37.85411784 L. Also, 5 gal = 18.92705892 L and 100 gal = 378.5411784 L.
What is the difference between a gallon and a liter?
A US liquid gallon is defined as 231 cubic inches, exactly 3.785411784 liters. A liter equals one cubic decimeter (1,000 cm³) and is the common metric unit for drinks and fuel.
Is this tool free and private?
Yes — the Gallon to Liter is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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