Liters to Gallons Converter

How to use the liters to gallons converter

1. Enter the value you want to convert in the number field.
2. Select the source unit from the From dropdown: Liters, US Gallons, or UK Imperial Gallons.
3. Select the target unit from the To dropdown.
4. Read the converted result immediately below. Change any field to recalculate.

How the Conversion Works

The math behind a liters to gallons conversion relies on two exact definitions. One US liquid gallon is defined as exactly 231 cubic inches, which equals 3.785411784 liters. One UK imperial gallon is defined as exactly 4.54609 liters.

To convert liters to US gallons, divide the liter value by 3.785411784. For example, 10 liters divided by 3.785411784 gives approximately 2.6417 US gallons. To go the other way (gallons to liters), multiply the gallon value by the same factor: 5 US gallons times 3.785411784 equals 18.92705892 liters.

For imperial gallons, divide liters by 4.54609. Converting between US and imperial gallons requires going through liters first: multiply by the source factor to get liters, then divide by the target factor.

Common Volume Conversions

This table shows frequently needed values for quick reference when converting between liters, US gallons, and UK imperial gallons.

US vs Imperial Gallons

The United States and the United Kingdom use different definitions for the gallon, which causes frequent confusion. The US liquid gallon is about 3.785 liters, while the UK imperial gallon is about 4.546 liters. This means an imperial gallon is roughly 20 percent larger than a US gallon.

When you see fuel economy figures, recipe measurements, or container sizes from British sources, they refer to imperial gallons. American sources always mean US liquid gallons. If you are converting litres to gallons for a European or Commonwealth context, you likely need the imperial figure. For North American contexts, use US gallons.

Canada officially adopted the metric system but historically used imperial gallons. Today, fuel in Canada is sold in liters, making this converter useful for cross-border travel.

Practical Uses for Volume Conversion

Converting liters to gallons comes up often in everyday tasks. Aquarium hobbyists regularly switch between tank sizes listed in liters and water treatments dosed per gallon. Automotive enthusiasts comparing engine oil capacities or fuel tank sizes across imported vehicles need accurate conversions.

In cooking and brewing, recipes from different countries specify liquids in either metric or imperial volumes. A home brewer following a British recipe must know that 5 imperial gallons of wort is not the same as 5 US gallons. Similarly, gardeners mixing fertilizers often encounter instructions in both systems.

For other unit conversions, tools like kg to lbs, cm to inches, or celsius to fahrenheit handle mass, length, and temperature respectively.

Spelling: Liters vs Litres

Both spellings refer to the exact same metric unit of volume. "Liter" is the standard spelling in American English, while "litre" is used in British, Canadian, Australian, and most other varieties of English. The International Bureau of Weights and Measures accepts both forms.

This converter handles liters to gallons queries regardless of which spelling you prefer. The underlying math remains identical: one litre equals one liter equals 0.001 cubic meters. When searching for litres to gallons, you will get the same precise conversion factors as the American spelling.

Worked examples

Each result below was produced by the same code the tool runs, so you can check your own numbers against them.