Gallon (US liquid) to Barrel (Oil) Conversion Result

Gallon (US liquid): unit of volume in the U.S. customary system widely used for measuring larger quantities of liquid. It is one of the most commonly recognized volume units in the U.S., particularly for gasoline, milk, and water. The U.S. gallon is abbreviated as "gal" and 1 gallon is equal to 3,785.411784 ml.

Relation to Other U.S. Customary Units:
  • 1 gallon = 4 quarts.
  • 1 gallon = 8 pints.
  • 1 gallon = 16 cups.
  • 1 gallon = 231 cubic inches.

Interesting facts:
  • 1 U.S. gallon of water weighs approximately 8.34 pounds (3.78 kg).
  • The U.S. gallon is smaller than the imperial gallon, which can lead to confusion in international trade or travel.
  • In the U.S., fuel efficiency is measured in miles per gallon (MPG), which is a key metric for vehicle performance.


Barrel (Oil): is a globally recognized unit of volume used to measure crude oil and other petroleum products. Although the actual liquid is not typically stored in barrels today, the term remains a standard in the oil industry for pricing, production, and trade. The size and definition of the oil barrel can vary slightly depending on the measurement system, but the most commonly used standard is the U.S. oil barrel.

1 oil barrel is equal to 42 U.S. gallons or 158.987 liters.