This converter turns cubic inches into oil barrels instantly, using the exact factor 1 cubic inch = 0.0001030715316 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-inch cube, traditional for US engine displacement. 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 inches- The amount you are converting, measured in cubic inches
0.0001030715316- The exact number of oil barrels in one cubic inch
oil barrels- The converted result
How it works, step by step
- Enter the number of cubic inches you want to convert.
- The value is multiplied by 0.0001030715316, 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 inches
Multiply 5 by 0.00010307153. That gives 0.000515 oil barrels. A quick sanity check: one cubic inch is smaller than one oil barrel, so the number should get smaller — and it does.
Converting 72 cubic inches
72 × 0.00010307153 = 0.007421 oil barrels. Working backwards, 0.007421 ÷ 0.00010307153 returns 72 cubic inches, 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 inch?
Exactly 0.0001030715316. 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 inches to oil barrels?
Oil Barrels = cubic inches × 0.0001030715316. To reverse it, divide instead: cubic inches = oil barrels ÷ 0.0001030715316, which is the same as multiplying by 9702.
Is the cubic inch bigger than the oil barrel?
No. One cubic inch is only 0.000103072 of a oil barrel, so the oil barrel is the larger unit.
Why does my answer differ slightly from other cubic-inches 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 inch?
The volume of a one-inch cube, traditional for US engine displacement.
What is a oil barrel?
The petroleum barrel: 42 US gallons, the global oil trading unit.
Cubic Inches to oil barrels reference table
| Cubic Inches | Oil Barrels |
|---|---|
| 0.5 in³ | 0.000052 bbl |
| 1 in³ | 0.000103 bbl |
| 2 in³ | 0.000206 bbl |
| 3 in³ | 0.000309 bbl |
| 5 in³ | 0.000515 bbl |
| 10 in³ | 0.001031 bbl |
| 15 in³ | 0.001546 bbl |
| 20 in³ | 0.002061 bbl |
| 25 in³ | 0.002577 bbl |
| 50 in³ | 0.005154 bbl |
| 75 in³ | 0.00773 bbl |
| 100 in³ | 0.010307 bbl |
| 250 in³ | 0.025768 bbl |
| 500 in³ | 0.051536 bbl |
| 1000 in³ | 0.103072 bbl |
Exact factor: 1 cubic inch = 0.0001030715316 oil barrels. Values rounded for display.