How many liters are in a US gallon?

Exactly 3.785411784 liters equal one US liquid gallon. Conversely, one liter equals approximately 0.264172 US gallons.

How many liters are in an imperial (UK) gallon?

Exactly 4.54609 liters equal one imperial gallon. One liter equals approximately 0.219969 imperial gallons.

What is the difference between US and imperial gallons?

The US gallon is about 17% smaller than the UK imperial gallon. 1 US gallon = 3.785 L; 1 imperial gallon = 4.546 L. This distinction matters for fuel, cooking, and chemical volumes.

Can I convert gallons back to liters here?

This tool converts liters to gallons. To go the other way, multiply US gallons by 3.785411784 or imperial gallons by 4.54609 to get liters.

How accurate are the results?

The conversion factors are exact by definition (SI and international standards). Results are displayed to six significant figures, which is sufficient for virtually all practical uses.

Liters to Gallons Converter

Enter a volume in liters and instantly see the equivalent in US gallons and imperial gallons.

Enter Volume in Liters

Liters (L)

Quick presets

Conversion Results

Enter a value in liters to see results

Copied!

Summary

This tool converts any volume entered in liters into both US liquid gallons and UK imperial gallons simultaneously. The US gallon equals exactly 3.785411784 liters, while the imperial gallon equals exactly 4.54609 liters. Results update instantly as you type, with no rounding surprises.

How it works

Type a volume in liters into the input field.
The tool multiplies your value by 0.264172 to get US gallons.
It also multiplies by 0.219969 to get imperial (UK) gallons.
Both results appear instantly below the input.
Use the Copy button to copy either result to your clipboard.
Hit the Reset button to clear the field and start over.

Use cases

Convert fuel economy figures between liters and gallons.
Understand liquid measurements in US recipes or product specs.
Compare European and American container sizes.
Convert aquarium or tank volumes for international equipment specs.
Calculate gallons from liters when buying beverages in bulk.
Assist travelers converting petrol prices between unit systems.
Convert irrigation or water usage data between unit systems.
Validate container capacities listed in foreign datasheets.

Frequently Asked Questions

Last updated: 2026-10-05 · Reviewed by Nham Vu