This converter turns oil barrels into US cups instantly, using the exact factor 1 oil barrel = 672 US cups. 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 petroleum barrel: 42 US gallons, the global oil trading unit. The US legal cup used in recipes: 240 mL, or 236.6 mL by the customary definition.
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
oil barrels- The amount you are converting, measured in oil barrels
672- The exact number of US cups in one oil barrel
US cups- The converted result
How it works, step by step
- Enter the number of oil barrels you want to convert.
- The value is multiplied by 672, the exact conversion factor.
- The result is displayed in US cups, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 oil barrels
Multiply 5 by 672. That gives 3,360 US cups. A quick sanity check: one oil barrel is larger than one US cup, so the number should get bigger — and it does.
Converting 72 oil barrels
72 × 672 = 48,384 US cups. Working backwards, 48,384 ÷ 672 returns 72 oil barrels, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many US cups are in one oil barrel?
Exactly 672. 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 oil barrels to US cups?
Us Cups = oil barrels × 672. To reverse it, divide instead: oil barrels = US cups ÷ 672, which is the same as multiplying by 0.001488095238.
Is the oil barrel bigger than the US cup?
Yes. One oil barrel equals 672 US cups, so it is the larger unit.
Why does my answer differ slightly from other oil-barrels to cups 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 oil barrel?
The petroleum barrel: 42 US gallons, the global oil trading unit.
What is a US cup?
The US legal cup used in recipes: 240 mL, or 236.6 mL by the customary definition.
Oil Barrels to US cups reference table
| Oil Barrels | Us Cups |
|---|---|
| 0.5 bbl | 336 cup |
| 1 bbl | 672 cup |
| 2 bbl | 1,344 cup |
| 3 bbl | 2,016 cup |
| 5 bbl | 3,360 cup |
| 10 bbl | 6,720 cup |
| 15 bbl | 10,080 cup |
| 20 bbl | 13,440 cup |
| 25 bbl | 16,800 cup |
| 50 bbl | 33,600 cup |
| 75 bbl | 50,400 cup |
| 100 bbl | 67,200 cup |
| 250 bbl | 168,000 cup |
| 500 bbl | 336,000 cup |
| 1000 bbl | 672,000 cup |
Exact factor: 1 oil barrel = 672 US cups. Values rounded for display.