US gallons

The United States gallon, often referred to as the "US gallon," is a unit of volume commonly used in the United States for measuring liquids. It is one of several different gallon measurements used worldwide, with each having its own value. Understanding the US gallon is important when dealing with American fluid measurements.

Definition and Usage

The US gallon is defined as 231 cubic inches (in³) or approximately 3.78541 liters (L). It is used for quantifying the volume of various liquids, including gasoline, milk, water, and other beverages. The US gallon is prevalent in the United States and some other countries that follow American fluid measurement standards.

Applications of US Gallons

The US gallon is used in various aspects of American life and industries:

  • Automotive: The capacity of fuel tanks in automobiles and trucks is often measured in US gallons.
  • Food and Beverage: Milk, juice, and other beverages are sold in containers labeled in US gallons.
  • Construction: Builders and contractors use US gallons to measure and mix fluids such as paint and concrete.
  • Agriculture: Farmers use US gallons for irrigation and fertilization purposes.
  • Retail: Some consumer products, like cleaning solutions, are packaged in US gallon-sized containers.

Conversions and Equivalents

Converting US gallons to other units of volume is helpful for various calculations:

  • 1 US Gallon ≈ 3.78541 Liters (L)
  • 1 US Gallon ≈ 128 US Fluid Ounces (fl oz)
  • 1 US Gallon ≈ 0.83268 Imperial Gallons (UK gallons)
  • 1 US Gallon ≈ 231 Cubic Inches (in³)


The US gallon is a unit of volume widely used in the United States, particularly for measuring liquids. Whether you're at the gas station, grocery store, or working on a home improvement project, knowing the value and applications of the US gallon is essential for accurate measurements and conversions.

Keywords: US Gallons, United States gallon, volume unit, US fluid ounces, gallon conversions, US measurement standards