A cubic foot is exactly 0.028316846592 cubic meters.
Cubic feet to Oil barrels Converter — ft3 to bbl
Convert Cubic foot (ft3) to Oil barrel (bbl) using the exact conversion factor (1 cubic foot = 0.1781076067 oil barrel). See the formula, worked examples, conversion table, history, and common uses.
Cubic feet to Oil barrels 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.
An oil barrel is 42 US gallons.
Result = input x 0.02831684659 / 0.1589872949.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Cubic feet to Oil barrels
Cubic foot and Oil barrel 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. Cubic foot is most often used for us natural gas utility billing (often in hundreds or thousands of cubic feet).
Formula
oil barrels = cubic feet × 0.178107606679
This factor comes from each unit's defined relationship to the category's base unit: 1 cubic foot equals 0.028316846592 base units, and 1 oil barrel equals 0.158987294928 base units, so dividing one by the other gives the direct cubic foot-to-oil barrel factor of 0.178107606679.
Simple example
1 ft3 × 0.1781076067 = 0.1781076067 bbl
1 cubic foot = 0.1781076067 oil barrels.
Real-world example
10 ft3 × 0.1781076067 = 1.781076067 bbl
10 cubic feet = 1.781076067 oil barrels.
Conversion table
| Cubic foot (ft3) | Oil barrel (bbl) |
|---|---|
| 1 ft3 | 0.1781076067 bbl |
| 5 ft3 | 0.8905380334 bbl |
| 10 ft3 | 1.781076067 bbl |
| 25 ft3 | 4.452690167 bbl |
| 50 ft3 | 8.905380334 bbl |
| 100 ft3 | 17.81076067 bbl |
Reverse conversion: Oil barrel to Cubic foot
0.1781076067 bbl × 5.614583333 = 1 ft3
0.1781076067 oil barrels = 1 cubic feet.
cubic feet = oil barrels × 5.61458333333
For a page dedicated to this direction, see Oil barrel to Cubic foot.
Understanding the Cubic foot
Cubic foot (ft3) measures volume. A cubic foot is exactly 0.028316846592 cubic meters, derived from the 1959 international foot. It is classified as a US/imperial customary unit.
Where it's used: United States (construction, HVAC, natural gas billing)
Uses of the Cubic foot today
- US natural gas utility billing (often in hundreds or thousands of cubic feet)
- HVAC airflow and building-volume calculations
- Lumber, concrete, and construction material estimation in the US
History of the Cubic foot
The cubic foot, like the square foot, follows from the standardized foot (exactly 0.3048 m since the 1959 international agreement) rather than having a separate historical definition.
Historical origin. Cubic foot was not the invention of a single named person; it developed through the process described above.
Understanding the Oil barrel (bbl)
An oil barrel is 42 US gallons.
Cubic foot — sources
- NIST — International yard and pound (1959) — Basis for the modern foot and its derived volume unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many oil barrels are in 1 cubic foot?
1 cubic foot equals 0.1781076067 oil barrels, using the exact defined conversion factor rather than an estimate.
How do I convert cubic foot to oil barrel?
Multiply the cubic foot value by 0.1781076067. The converter above does this instantly to whatever precision you set.
How do I convert oil barrel back to cubic foot?
Use the reverse factor: 1 oil barrel equals 5.614583333 cubic feet. You can also use the swap control in the converter above to flip the direction instantly.
What is a cubic foot?
Cubic foot (ft3) measures volume. A cubic foot is exactly 0.028316846592 cubic meters, derived from the 1959 international foot. It is classified as a US/imperial customary unit.
What is a oil barrel?
Oil barrel (bbl) is a unit of volume.
Is the cubic foot to oil barrel conversion exact?
Yes. A cubic foot is exactly 0.028316846592 cubic meters, derived from the 1959 international foot. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the cubic foot still used today?
United States (construction, HVAC, natural gas billing)