This converter turns US cups into oil barrels instantly, using the exact factor 1 US cup = 0.001488095238 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 US legal cup used in recipes: 240 mL, or 236.6 mL by the customary definition. 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
US cups- The amount you are converting, measured in US cups
0.001488095238- The exact number of oil barrels in one US cup
oil barrels- The converted result
How it works, step by step
- Enter the number of US cups you want to convert.
- The value is multiplied by 0.001488095238, 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 US cups
Multiply 5 by 0.0014880952. That gives 0.00744 oil barrels. A quick sanity check: one US cup is smaller than one oil barrel, so the number should get smaller — and it does.
Converting 72 US cups
72 × 0.0014880952 = 0.107143 oil barrels. Working backwards, 0.107143 ÷ 0.0014880952 returns 72 US cups, 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 US cup?
Exactly 0.001488095238. 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 US cups to oil barrels?
Oil Barrels = US cups × 0.001488095238. To reverse it, divide instead: US cups = oil barrels ÷ 0.001488095238, which is the same as multiplying by 672.
Is the US cup bigger than the oil barrel?
No. One US cup is only 0.0014881 of a oil barrel, so the oil barrel is the larger unit.
Why does my answer differ slightly from other cups 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 US cup?
The US legal cup used in recipes: 240 mL, or 236.6 mL by the customary definition.
What is a oil barrel?
The petroleum barrel: 42 US gallons, the global oil trading unit.
Us Cups to oil barrels reference table
| Us Cups | Oil Barrels |
|---|---|
| 0.5 cup | 0.000744 bbl |
| 1 cup | 0.001488 bbl |
| 2 cup | 0.002976 bbl |
| 3 cup | 0.004464 bbl |
| 5 cup | 0.00744 bbl |
| 10 cup | 0.014881 bbl |
| 15 cup | 0.022321 bbl |
| 20 cup | 0.029762 bbl |
| 25 cup | 0.037202 bbl |
| 50 cup | 0.074405 bbl |
| 75 cup | 0.111607 bbl |
| 100 cup | 0.14881 bbl |
| 250 cup | 0.372024 bbl |
| 500 cup | 0.744048 bbl |
| 1000 cup | 1.4881 bbl |
Exact factor: 1 US cup = 0.001488095238 oil barrels. Values rounded for display.