Gallons to Liters Converter
Formula
liters = gallons × 3.78541
To convert US gallons to liters, multiply by 3.78541. One US gallon equals approximately 3.785 liters.
How to use
- Enter the volume in the Gallons field.
- Each US gallon is multiplied by 3.78541 liters.
- Read the converted Liters value below.
Example
Enter 5 in the Gallons field. The tool computes 5 × 3.78541 = 18.93, so 5 US gallons equals about 18.93 liters.
Frequently Asked Questions
How many liters is 1 gallon?
1 US gallon = approximately 3.785 liters.
What's the difference between US and UK gallons?
A US gallon is 3.785 liters. A UK (imperial) gallon is 4.546 liters — about 20% larger.
How do I convert a price per gallon to a price per liter?
Divide the price per gallon by 3.78541, since one US gallon contains about 3.785 liters. For example, gas at $3.50 per gallon works out to about $0.92 per liter. This is handy when comparing US fuel prices to those in countries that sell gas by the liter.
How many liters are in a half gallon or a quart?
A half gallon is about 1.89 liters (0.5 × 3.785). A quart, which is a quarter of a gallon, is roughly 0.946 liters — close enough that a quart and a liter are often treated as interchangeable in casual use. A pint, half of a quart, comes out to about 0.473 liters.