Barrel to Gallon US Converter

1 Barrel = 42 Gallon US
Barrel ➜ Gallon US (US gal)
 
barrel

Barrel vs Gallon US Comparison Chart

Source - BarrelTarget - Gallon US

Barrel (barrel) - Definition and Overview

What is Barrel?

A Barrel typically refers to a unit of volume used to measure liquids such as oil. In the oil industry, a standard barrel of oil is typically defined as 42 US gallons (about 159 liters) or approximately 158.9873 liters.

Summary

  • The barrel is a unit of volume that is commonly used in the oil industry to measure the volume of crude oil and other petroleum products
  • It is also used in the brewing and distilling industries to measure the volume of beer and spirits
  • The barrel is a convenient unit of volume because it is easy to convert to other units of volume, such as gallons and liters.

Gallon US (US gal) - Definition and Overview

What is Gallon US?

A US Gallon is defined as 231 cubic inches or approximately 3.78541 liters. The US gallon is used for measuring liquid volume in United States and some Latin American and Caribbean countries.

Summary

  • The US gallon is a unit of volume that is commonly used in the United States and some Latin American and Caribbean countries to measure the volume of liquids, such as gasoline, milk, and water
  • It is also used in the brewing and distilling industries to measure the volume of beer and spirits
  • The US gallon is a convenient unit of volume because it is easy to convert to other units of volume, such as liters and cubic inches.

How to Convert Barrel to Gallon US?

1 Barrel is equal to 42 Gallon US. To convert Barrel to Gallon US, use this simple formula:

Gallon US = Barrel x 42

So, just multiply the number of Barrel by 42 to get equivalent value in Gallon US.

Example 1:

Convert 5 Barrel to Gallon US
5 x 42 = 210 Gallon US

Example 2:

Convert 7.5 Barrel to Gallon US
7.5 x 42 = 315 Gallon US

Author Information

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Rajesh V U

Full-Stack Developer & Storage Technologist | Creator of UnitSmash.com
Last updated: June 1, 2026

I am a Storage Technologist with strong experience in enterprise storage systems, Angular development, and web-based tools. I enjoy building practical calculators, converters, and utilities, and I also create original cartoons. I share my tools, articles, and creative work on my personal website, rajeshvu.com.