Gallons to Liters Converter
Convert liquid volume from US gallons (gal) to metric liters (L) instantly. A precise tool for automotive fuel tracking, commercial fluid logistics, and scientific research.
Result in Liters (L)
The Trans-Atlantic Difference
The US liquid gallon is defined as 231 cubic inches. It is smaller than the Imperial gallon used in some UK applications. Most modern commercial and scientific standards utilize the liter (L) to avoid regional confusion in logistics and trade.
What is a Gallon?
A US liquid gallon is equivalent to 128 fluid ounces or roughly 3.78 liters. It's the standard for fuel and beverage packaging in the United States.
What is a Liter?
A metric unit of volume equal to one cubic decimeter. It is the primary unit for liquids in the metric system worldwide.
Conversion Formula
Official Multiplier
L = gal × 3.78541178
Multiply the US gallon value by 3.785 to find the liters. For a quick mental estimate, think of it as roughly 4 liters per gallon.
Gallons to Liters Conversion List
Gallons (US gal) Liters (L) 1 gal 3.785 L 5 gal 18.927 L 10 gal 37.854 L 50 gal 189.271 L 100 gal 378.541 L Automotive Fuel & Fluid Standards
Vehicle / Fluid Type Imperial (gal) Metric (L) Standard Oil Flush 1.25 gal 4.73 L Small Jerry Can 2.5 gal 9.46 L Classic Fuel Can 5 gal 18.93 L Subcompact Fuel Tank 10.5 gal 39.75 L Intermediate Sedan Tank 15.8 gal 59.81 L Full-size SUV Tank 28.5 gal 107.88 L Frequently Asked Questions