Gallon to Liter Converter | Converter Tools Kit

Gallon to Liter Converter

Quickly and accurately convert volume measurements from gallons to liters with our free online Gallon to Liter Converter. Perfect for cooking, fuel measurement, and more.

Convert

From:

gal

To:

Result

Precision: 9 decimal places

1 gallon = 3.78541 liters

1 US gallon = 3.78541 liters

Common Conversions

US Gallons (gal)	Liters (L)
0.5 gal	1.89271 L
1 gal	3.78541 L
2 gal	7.57082 L
5 gal	18.92705 L
10 gal	37.8541 L
20 gal	75.7082 L
50 gal	189.2705 L
100 gal	378.541 L

How It Works

Converting from US gallons (gal) to liters (L) is a common volume conversion, especially when dealing with liquids in international contexts, cooking, or fuel measurements.

Conversion Formula:

1 US gallon = 3.78541 liters

To convert US gallons to liters, multiply the gallon value by 3.78541:

Liters = US Gallons × 3.78541

Example Calculation:

To convert 5 US gallons to liters:

Liters = 5 gal × 3.78541 = 18.92705 L

Our converter handles this calculation automatically and provides results with up to 9 decimal places for precision. It also formats the result to remove unnecessary trailing zeros for better readability.

Note on Different Gallon Measurements:

This converter uses the US liquid gallon (3.78541 liters). The UK (imperial) gallon is different and equals 4.54609 liters. Make sure you’re using the appropriate conversion for your needs.

Frequently Asked Questions

What is a US gallon?

A US gallon (gal) is a unit of volume in the US customary system, equal to 231 cubic inches or about 3.78541 liters. It’s commonly used in the United States for measuring large volumes of liquids, particularly fuel, milk, and other consumer products.

What is a liter?

A liter (L) is a metric unit of volume equal to 1,000 cubic centimeters or 1 cubic decimeter. It’s commonly used worldwide for measuring the volume of liquids and some solids. One liter of water weighs approximately 1 kilogram at 4°C.

What’s the difference between US and UK gallons?

The US gallon (3.78541 liters) is smaller than the UK (imperial) gallon (4.54609 liters). This means 1 UK gallon is approximately 1.2 US gallons. This converter uses the US gallon, which is the standard in the United States.

Why would I need to convert gallons to liters?

This conversion is commonly needed when traveling between countries that use different measurement systems, following recipes from different regions, calculating fuel economy (miles per gallon vs. liters per 100km), or working with equipment and containers manufactured in different countries.

How accurate is this converter?

Our converter uses the standard conversion factor of 3.78541 liters per US gallon, which is accurate to the commonly accepted international standard. The calculator can display results with up to 9 decimal places for high precision needs.

How do I convert liters back to gallons?

To convert from liters to US gallons, multiply the liter value by 0.264172. Alternatively, you can use our Liter to Gallon Converter for quick and accurate conversions.