An oil barrel is 42 US gallons.
Oil barrels to Fluid ounces Converter — bbl to fl oz
Convert Oil barrel (bbl) to Fluid ounce (fl oz) using the exact conversion factor (1 oil barrel = 5,376 fluid ounce). See the formula, worked examples, conversion table, history, and common uses.
Oil barrels to Fluid ounces converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
A US fluid ounce is 1/128 of a US gallon.
Result = input x 0.1589872949 / 2.95735296e-5.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Oil barrels to Fluid ounces
Oil barrel and Fluid ounce appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Specifically: An oil barrel is 42 US gallons, and a US fluid ounce is 1/128 of a US gallon.
Formula
fluid ounces = oil barrels × 5376
This factor comes from each unit's defined relationship to the category's base unit: 1 oil barrel equals 0.158987294928 base units, and 1 fluid ounce equals 0.0000295735295625 base units, so dividing one by the other gives the direct oil barrel-to-fluid ounce factor of 5376.
Simple example
1 bbl × 5376 = 5,376 fl oz
1 oil barrel = 5,376 fluid ounces.
Real-world example
10 bbl × 5376 = 53,760 fl oz
10 oil barrels = 53,760 fluid ounces.
Conversion table
| Oil barrel (bbl) | Fluid ounce (fl oz) |
|---|---|
| 1 bbl | 5,376 fl oz |
| 5 bbl | 26,880 fl oz |
| 10 bbl | 53,760 fl oz |
| 25 bbl | 134,400 fl oz |
| 50 bbl | 268,800 fl oz |
| 100 bbl | 537,600 fl oz |
Reverse conversion: Fluid ounce to Oil barrel
1 fl oz × 0.0001860119048 = 0.0001860119 bbl
1 fluid ounce = 0.0001860119 oil barrels.
oil barrels = fluid ounces × 0.000186011904762
For a page dedicated to this direction, see Fluid ounce to Oil barrel.
Understanding the Oil barrel (bbl)
An oil barrel is 42 US gallons.
Understanding the Fluid ounce
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US customary unit.
Where it's used: United States (beverage, nutrition labeling)
Uses of the Fluid ounce today
- US beverage container sizing (soda, water bottles)
- US nutrition and medication dosing labels
History of the Fluid ounce
The US fluid ounce follows from the same English wine-gallon system as the rest of the US liquid volume units, defined as a consistent fraction of the gallon.
Historical origin. Fluid ounce was not the invention of a single named person; it developed through the process described above.
Fluid ounce — sources
- NIST Handbook 44, Appendix C — General tables of units including the US fluid ounce definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many fluid ounces are in 1 oil barrel?
1 oil barrel equals 5,376 fluid ounces, using the exact defined conversion factor rather than an estimate.
How do I convert oil barrel to fluid ounce?
Multiply the oil barrel value by 5376. The converter above does this instantly to whatever precision you set.
How do I convert fluid ounce back to oil barrel?
Use the reverse factor: 1 fluid ounce equals 0.0001860119 oil barrels. You can also use the swap control in the converter above to flip the direction instantly.
What is a oil barrel?
Oil barrel (bbl) is a unit of volume.
What is a fluid ounce?
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US customary unit.
Is the oil barrel to fluid ounce conversion exact?
Yes. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.