Barrel (Oil)
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://unitfyi.com/iframe/glossary/barrel-def/" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://unitfyi.com/glossary/barrel-def/Add a dynamic SVG badge to your README or docs.
[](https://unitfyi.com/glossary/barrel-def/)Use the native HTML custom element.
Definition
A unit of volume for crude oil, equal to 42 US gallons (158.987 liters).
Explanation
The 42-gallon barrel became standard for oil in 1866. It is abbreviated 'bbl'. One barrel of oil contains about 6.1 GJ of energy.
RELATED ARTICLES
From milligrams to metric tons, this guide covers every major weight and mass unit with exact conversion factors, real-world examples, and a clear explanation of why weight and mass are not the same thing.
Complete Guide to Length Units: From Nanometers to Light-YearsA comprehensive reference covering every major length unit—metric, imperial, nautical, and astronomical—with exact conversion factors and real-world scale examples.
RELATED TERMS
Conversion Factor
A numerical multiplier used to convert a quantity from one unit to another.
Precision
The degree of refinement in a measurement, indicated by the number of significant digits.
Accuracy
How close a measurement is to the true value of the quantity being measured.
Dimensional Analysis
A method of converting units by multiplying by conversion factors that equal 1.
Nautical Mile
A unit of distance used in sea and air navigation, equal to 1,852 meters.