This converter turns cubic feet into oil barrels instantly, using the exact factor 1 cubic foot = 0.1781076067 oil barrels. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
The volume of a one-foot cube — used for shipping, refrigerators and natural gas. The petroleum barrel: 42 US gallons, the global oil trading unit.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
cubic feet- The amount you are converting, measured in cubic feet
0.1781076067- The exact number of oil barrels in one cubic foot
oil barrels- The converted result
How it works, step by step
- Enter the number of cubic feet you want to convert.
- The value is multiplied by 0.1781076067, the exact conversion factor.
- The result is displayed in oil barrels, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 cubic feet
Multiply 5 by 0.17810761. That gives 0.890538 oil barrels. A quick sanity check: one cubic foot is smaller than one oil barrel, so the number should get smaller — and it does.
Converting 72 cubic feet
72 × 0.17810761 = 12.8237 oil barrels. Working backwards, 12.8237 ÷ 0.17810761 returns 72 cubic feet, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many oil barrels are in one cubic foot?
Exactly 0.1781076067. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert cubic feet to oil barrels?
Oil Barrels = cubic feet × 0.1781076067. To reverse it, divide instead: cubic feet = oil barrels ÷ 0.1781076067, which is the same as multiplying by 5.614583333.
Is the cubic foot bigger than the oil barrel?
No. One cubic foot is only 0.178108 of a oil barrel, so the oil barrel is the larger unit.
Why does my answer differ slightly from other cubic-feet to oil-barrels converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a cubic foot?
The volume of a one-foot cube — used for shipping, refrigerators and natural gas.
What is a oil barrel?
The petroleum barrel: 42 US gallons, the global oil trading unit.
Cubic Feet to oil barrels reference table
| Cubic Feet | Oil Barrels |
|---|---|
| 0.5 ft³ | 0.089054 bbl |
| 1 ft³ | 0.178108 bbl |
| 2 ft³ | 0.356215 bbl |
| 3 ft³ | 0.534323 bbl |
| 5 ft³ | 0.890538 bbl |
| 10 ft³ | 1.7811 bbl |
| 15 ft³ | 2.6716 bbl |
| 20 ft³ | 3.5622 bbl |
| 25 ft³ | 4.4527 bbl |
| 50 ft³ | 8.9054 bbl |
| 75 ft³ | 13.3581 bbl |
| 100 ft³ | 17.8108 bbl |
| 250 ft³ | 44.5269 bbl |
| 500 ft³ | 89.0538 bbl |
| 1000 ft³ | 178.1076 bbl |
Exact factor: 1 cubic foot = 0.1781076067 oil barrels. Values rounded for display.