US Gallon to Liter Converter
This tool converts US Gallon (gal) to Liter (L) quickly and accurately. Whether you are traveling abroad, comparing fuel economy, or working with metric specifications, it delivers instant results as you type.
Understanding the Units
US Gallon (gal)
Liter (L)
Who Uses This Conversion?
- Travelers — understanding fuel costs when driving abroad
- Car enthusiasts — comparing vehicle specs from different markets
- Expats — adapting to metric measurements abroad
- Online shoppers — converting product sizes from US retailers
How to Use
Converting US Gallon to Liter takes just seconds:
Enter the US Gallon Value
Type your value in US Gallon (gal) into the first input field.
View the Liter Result
The equivalent value in Liter (L) appears instantly in the second field — no convert button needed.
Copy the Result
Use the copy button to send the result to your clipboard for documents, notes, or other tools.
Reverse Conversion
Need to convert Liter to US Gallon instead? Click the swap button (↔) to reverse the direction, or simply type in the Liter field directly.
Tips for Accurate Conversions
- Use decimal points for precise values (e.g., 10.5 instead of 11)
- Large numbers are automatically formatted with thousand separators
- Results update instantly as you type
- Use the unit dropdowns to switch to any other volume unit
Features
Instant Conversion
Results appear as you type, with no convert button. The calculation uses precise conversion factors for accurate results.
Bidirectional Input
Type in either field and the other updates automatically, so you can work in whichever direction you need.
Copy Results
Click the copy button next to any value to copy it to your clipboard for documents, notes, or other applications.
Quick Reference Table
The reference section shows common US Gallon-to-Liter conversions at a glance for fast lookups.
Unit Flexibility
Use the dropdowns to switch to other volume units — liters, milliliters, gallons, cups, fluid ounces, and many more.
Mobile Friendly
The converter works on all devices — desktop, tablet, and mobile. Convert volume units wherever you need them.
Common Conversions
| US Gallon (gal) | Liter (L) |
|---|---|
| 1 gal | 3.79 L |
| 2 gal | 7.57 L |
| 5 gal | 18.93 L |
| 10 gal | 37.85 L |
| 15 gal | 56.78 L |
| 20 gal | 75.71 L |
Frequently Asked Questions
How many liters are in a gallon?
One US gallon equals 3.785 liters. This is the liquid gallon used for fuel, beverages, and most liquid measurements in the United States.
Why is a US gallon different from a UK gallon?
Historical differences in measurement standards. The US gallon (3.785 L) is based on the wine gallon, while the UK imperial gallon (4.546 L) was standardized differently in 1824. The UK gallon is about 20% larger.
How do I convert my car's fuel economy?
To convert MPG (miles per gallon) to L/100km, divide 235.21 by your MPG. For example, 30 MPG = 235.21 ÷ 30 = 7.84 L/100km.
How much is 5 gallons in liters?
5 US gallons = 18.93 liters. This is a common size for water jugs and fuel containers.
What's an easy way to remember the conversion?
Remember that 1 gallon is slightly less than 4 liters. For quick estimates, multiply gallons by 4 and you'll be within 6% of the exact answer.
Are liquid and dry gallons the same?
No. A US liquid gallon is 3.785 liters, while a US dry gallon is 4.405 liters. This converter uses liquid gallons, which is standard for fuels and beverages.
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