How many liters in a gallon?

1 US gallon = 3.78541 liters. 1 UK (imperial) gallon = 4.54609 liters. Our converter supports both US and UK gallons.

What's the difference between US and UK gallons?

A US gallon is 3.785 liters while a UK (imperial) gallon is 4.546 liters. Our converter lists both separately.

What volume units are supported?

We support milliliters, liters, cubic meters, US gallons, UK gallons, fluid ounces, cups, pints, and quarts.

How many cups in a liter?

1 liter = approximately 4.227 US cups. Enter the value in liters and select 'Cup (US)' to convert.

Yes! All volume conversions are free and calculated instantly in your browser.

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Volume Converter

Convert between liters, gallons, cups, fluid ounces, and more

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From

Decimal Places:

All Conversions

Milliliter

1000

Liter

Cubic Meter

0.001

m³

Gallon (US)

0.264172

gal

Gallon (UK)

0.219969

gal

Fluid Ounce (US)

33.814057

fl oz

Cup (US)

4.226757

cup

Pint (US)

2.113379

Quart (US)

1.056688

How It Works

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Frequently Asked Questions

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Last updated: Feb 27, 2026