Gallons to Liters Converter
Convert US gallons and UK gallons to liters instantly. Free online volume converter with conversion table and formula.
Why Convert Volume from Gallons to Liters?
The liter (L) is the standard unit of volume used in most countries worldwide. If you're traveling from the US to another country, comparing international fuel prices, or working with metric recipes, you'll need to convert gallons to liters.
This conversion is essential for international travel, understanding global fuel costs, scientific measurements, and working with metric-based equipment and containers.
What is a Gallon?
The gallon is a unit of volume in the imperial measurement system. There are two different gallon sizes in use:
- US Gallon: 3.78541 liters - used in the United States
- UK/Imperial Gallon: 4.54609 liters - used in the United Kingdom and some Commonwealth countries
- One US gallon contains 128 US fluid ounces
- One US gallon equals 4 US quarts or 8 US pints
What is a Liter?
The liter (L) is a metric unit of volume. It is the most widely used unit for measuring liquid volumes globally.
- One liter equals 1,000 milliliters (mL)
- One liter equals 1 cubic decimeter (dm³)
- One liter of water at 4°C weighs approximately 1 kilogram
- Standard unit for beverage containers worldwide
Gallons to Liters Conversion Formula
To convert US gallons to liters, use the following formula:
To convert UK gallons to liters:
Conversion Table: Gallons to Liters
Here is a quick reference table for common volume conversions:
| US Gallons | Liters (L) | UK Gallons | Liters (L) |
|---|---|---|---|
| 0.5 gal | 1.89 L | 0.5 gal | 2.27 L |
| 1 gal | 3.79 L | 1 gal | 4.55 L |
| 2 gal | 7.57 L | 2 gal | 9.09 L |
| 3 gal | 11.36 L | 3 gal | 13.64 L |
| 4 gal | 15.14 L | 4 gal | 18.18 L |
| 5 gal | 18.93 L | 5 gal | 22.73 L |
| 10 gal | 37.85 L | 10 gal | 45.46 L |
| 15 gal | 56.78 L | 15 gal | 68.19 L |
| 20 gal | 75.71 L | 20 gal | 90.92 L |
| 25 gal | 94.64 L | 25 gal | 113.65 L |
| 50 gal | 189.27 L | 50 gal | 227.30 L |
US Gallon vs UK Gallon
It's important to know which gallon type you're working with:
| Property | US Gallon | UK/Imperial Gallon |
|---|---|---|
| Volume in Liters | 3.78541 L | 4.54609 L |
| Used In | United States, Latin America | UK, Canada, some Commonwealth nations |
| Fluid Ounces | 128 US fl oz | 160 UK fl oz |
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About Gallons to Liters Converter
Our free Gallons to Liters converter tool makes it easy to convert volume measurements from both US and UK gallons to liters. Whether you're traveling internationally, comparing fuel costs, or working with metric recipes, this tool provides instant and accurate conversions.
How to Use This Tool
- Select the gallon type (US or UK)
- Enter the volume in gallons
- The conversion to liters will appear automatically
Common Uses
- Fuel: Understanding international fuel prices
- Travel: Converting American measurements abroad
- Cooking: Adapting US recipes for metric measurements
- Science: Converting to standard metric units
Quick Reference
- 1 US gallon = 3.785 liters
- 1 UK gallon = 4.546 liters
- 5 US gallons = 18.93 liters
- 10 US gallons = 37.85 liters