Convert US gallons to liters
1 US gallon equals 3.7854 liters. Type any number below — the other side updates instantly.
By Numerly · Updated
US gallons to liters — quick reference
| US gallons | liters |
|---|---|
| 0.25 gal | 0.946353 L |
| 0.5 gal | 1.8927 L |
| 1 gal | 3.7854 L |
| 1.5 gal | 5.6781 L |
| 2 gal | 7.5708 L |
| 2.5 gal | 9.4635 L |
| 3 gal | 11.3562 L |
| 4 gal | 15.1416 L |
| 5 gal | 18.9271 L |
| 7 gal | 26.4979 L |
| 10 gal | 37.8541 L |
| 15 gal | 56.7812 L |
| 20 gal | 75.7082 L |
| 25 gal | 94.6352 L |
| 50 gal | 189.27 L |
| 100 gal | 378.541 L |
Convert a specific value
The most-searched exact US gallons-to-liters amounts, each with its own page.
How to convert
Multiply the number of US gallons by 3.7854 to get liters. To go the other way, multiply liters by 0.264172 to get US gallons. The conversion factor is fixed and exact, so you can use this on any value.
About these units
US gallons
- Definition
- A US gallon equals 128 fluid ounces, 4 quarts, or about 3.785 liters. The Imperial (UK) gallon is larger at 4.546 L.
- History
- The US gallon descends from the British wine gallon of 1707; the UK redefined its own gallon in 1824, creating the divergence that persists today.
- Current use
- The US gallon is used in the United States for fuel, milk, paint, and large-volume liquids. The Imperial gallon survives in some contexts in the UK and Caribbean.
Liters
- Definition
- A liter (symbol: L) is the metric unit of volume equal to 1,000 cubic centimeters or about 0.264 US gallons.
- History
- Originally defined in 1795 as one cubic decimeter. Briefly redefined in 1901 to be the volume of one kilogram of water at 4°C, then reverted to the cubic-decimeter definition in 1964.
- Current use
- The liter is the standard liquid-volume unit in nearly every country, used for fuel, beverages, water tanks, and chemistry.
Frequently asked
- How many liters are in 1 US gallon?
- 1 US gallon = 3.7854 liters.
- How do you convert US gallons to liters?
- Multiply the number of US gallons by 3.7854 to get liters. To go the other way, multiply liters by 0.264172 to get US gallons. The conversion factor is fixed and exact, so you can use this on any value.
- What is 5 US gallons in liters?
- 5 US gallons = 18.9271 liters.
- What is 10 US gallons in liters?
- 10 US gallons = 37.8541 liters.
- What is 20 US gallons in liters?
- 20 US gallons = 75.7082 liters.
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