Gallon to Liter Converter
Convert between gallons and liters volume units
Volume Conversion
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US gallon = 3.78541 L, UK gallon = 4.54609 L
Conversion Result
1 US gal ≈ 3.785 L
Gallon to Liter Conversion (US gal to L)
Easily convert gallons to liters with our straightforward guide and conversion table. Whether you’re calculating fuel capacity, recipe volumes, or container sizes, knowing how to convert U.S. gallons to liters is essential for both everyday and technical tasks.
What Is a Gallon?
A U.S. gallon is a unit of volume used mainly for liquid measurement. Defined as 231 cubic inches, it equals exactly 3.785411784 liters. In the U.S. customary system, a gallon consists of:
- 4 quarts
- 8 pints
- 16 cups
- 128 fluid ounces
It’s important to note the difference between the U.S. gallon and the imperial gallon used in countries like the UK and Canada. The imperial gallon equals 4.54609 liters, larger than the U.S. version.
Where Gallons Are Used
In the United States, gallons are commonly used for measuring gasoline, milk, and large liquid containers. It’s the standard unit for fuel economy ratings (e.g., miles per gallon).
What Is a Liter?
A liter (L) is a metric unit of volume equivalent to 1,000 cubic centimeters (cm³) or 1 cubic decimeter (dm³). Though not officially an SI unit, it is widely accepted and used globally for measuring liquids and many dry capacities.
Where Liters Are Used
Liters are the standard unit for measuring volume in most countries outside the U.S. You’ll see them used in everything from soft drink bottles and water jugs to fuel prices, refrigerator sizes, and car engine capacities.
Gallon to Liter (US) Conversion Table
| Gallons (US) | Liters (L) |
| 0.01 gal | 0.03785 L |
| 0.1 gal | 0.37854 L |
| 1 gal | 3.78541 L |
| 2 gal | 7.57082 L |
| 5 gal | 18.92706 L |
| 10 gal | 37.85412 L |
| 20 gal | 75.70824 L |
| 50 gal | 189.27059 L |
| 100 gal | 378.54118 L |
| 1000 gal | 3785.41178 L |
Gallon to Liter Conversion Formula
To convert gallons to liters, multiply the number of gallons by 3.785411784:
Liters = Gallons × 3.785411784
Example
Convert 15 U.S. gallons to liters:
15 gal × 3.785411784 = 56.78117676 L
Read more guideline here:
- U.S. National Institute of Standards and Technology (NIST) – Metric Conversion Guidelines
- UK Government Fuel Measurement and Conversion Tables