Convert US Gallon to US Oil Barrel
Convert us gallons to us oil barrels instantly. 1 us gallon = 0.0238095238 us oil barrel — use the live calculator, the exact formula, a conversion table and worked examples. Also check the US Oil Barrel to US Gallon converter for the reverse conversion.
Units explained
US Gallon
The US liquid gallon is defined as exactly 231 cubic inches (3.785411784 liters).
Based on the English wine gallon of 231 cubic inches, retained by the US after 1824.
The primary US unit for fuel, milk and large beverage containers.
English wine gallon; US since 1824.
US Oil Barrel
The petroleum barrel is exactly 42 US gallons (158.987 L).
Set by the US petroleum industry in the 1860s and now a global oil-trade standard.
The standard unit for crude-oil pricing and production worldwide.
US oil industry, 1860s.
US Gallon to US Oil Barrel conversion formula
The relationship between us gallons and us oil barrels:
To convert us gallons to us oil barrels, multiply the value in us gallons by 0.0238095238. To reverse, multiply us oil barrels by 42.
How to use this converter
Type a value into the calculator. The result in us oil barrels updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the US Oil Barrel to US Gallon converter for the reverse direction.
Step-by-step: convert us gallons to us oil barrels
- Write down the value in us gallons (gal).
- Multiply that value by the factor 0.0238095238.
- The product is the equivalent value in us oil barrels (bbl (oil)).
- To reverse, multiply the us oil barrel value by 42.
Worked examples
Example 1 — Convert 1 gal to bbl (oil):
1 × 0.0238095238 = 0.0238095238 bbl (oil)
Example 2 — Convert 100 gal to bbl (oil):
100 × 0.0238095238 = 2.380952381 bbl (oil)
Real-world example — Body height conversion
You enter your height as 180 us gallons into an international job or visa application. The form then asks for the same value in us oil barrels — converting between these adjacent units is one of the most-used length conversions globally.
180 gal × 0.0238095238 = 4.2857142857 bbl (oil)
Real-world example — Furniture and large objects
A 72-us gallon piece of furniture converts to a value in us oil barrels that's easier to mentally compare with room dimensions. This is the typical workflow when shopping internationally and product specs use a different unit than your room measurements.
72 gal × 0.0238095238 = 1.7142857143 bbl (oil)
Real-world example — Children's height milestones
A 150-us gallon-tall child measures a value in us oil barrels that's commonly used for theme-park ride height requirements when travelling between countries that use different measurement units.
150 gal × 0.0238095238 = 3.5714285714 bbl (oil)
US Gallon to US Oil Barrel conversion table
Standard reference values for converting us gallons to us oil barrels:
| US Gallon [gal] | US Oil Barrel [bbl (oil)] |
|---|---|
| 0.01 | 0.0002380952 |
| 0.1 | 0.0023809524 |
| 1 | 0.0238095238 |
| 2 | 0.0476190476 |
| 3 | 0.0714285714 |
| 4 | 0.0952380952 |
| 5 | 0.119047619 |
| 10 | 0.2380952381 |
| 20 | 0.4761904762 |
| 30 | 0.7142857143 |
| 40 | 0.9523809524 |
| 50 | 1.1904761905 |
| 100 | 2.380952381 |
| 500 | 11.9047619048 |
| 1000 | 23.8095238095 |
Frequently asked questions
How many us oil barrels is 1 us gallon?
How do I convert us gallons to us oil barrels?
How do I convert us oil barrels back to us gallons?
How many us oil barrels is 100 us gallons?
Popular volume unit conversions
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Metric / SI (15 units)
US Customary (Liquid) (14 units)
US Customary (Dry) (5 units)
Imperial (UK) (14 units)
Cubic (length-derived) (4 units)
Cooking / Culinary (5 units)
Sources & references
Conversion factor (1 gal = 0.0238095238 bbl (oil)) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.