4 Barrel (Oil) to Gallon (US)
Quick answer
4 Barrel (Oil) (bbl) equals
168 gal
To convert 4 Barrel (Oil)s to Gallon (US)s, multiply by 42. Therefore, 4 Barrel (Oil) (bbl) equals 168 Gallon (US) (gal).
Formula: gal = bbl × 42. Calculation: 4 × 42 = 168 gal.
Convert Barrel (Oil) (bbl) to Gallon (US) (gal) online with our free unit converter. In volume, 1 bbl = 42 gal. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Barrel (Oil) to Gallon (US)
- Step 1 — start with the formula. gal = bbl × 42
- Step 2 — substitute your figure. 4 bbl × 42
- Step 3 — read the result. 4 bbl = 168 gal
- Step 4 — check it in reverse. bbl = gal × 0.0238095238 returns 4 bbl, which matches the figure you started with.
Volume Converter
40 units available
4 bbl = 168 gal
Formula:
gal = bbl × 42With your value: 4 bbl = 168 gal
How big is that?
Everyday references on a logarithmic scale, all expressed in barrel (oil) so you can sanity-check the result.
Other Barrel (Oil) to Gallon (US) conversions
Barrel (Oil) to Gallon (US) Conversion Table
| Barrel (Oil) (bbl) | Gallon (US) (gal) |
|---|---|
| 0.5 | 21 |
| 1 | 42 |
| 2 | 84 |
| 5 | 210 |
| 10 | 420 |
| 15 | 630 |
| 20 | 840 |
| 25 | 1,050 |
| 50 | 2,100 |
| 100 | 4,200 |
| 250 | 10,500 |
| 500 | 21,000 |
| 1000 | 42,000 |
Gallon (US) to Barrel (Oil) Conversion Table
| Gallon (US) (gal) | Barrel (Oil) (bbl) |
|---|---|
| 0.5 | 0.011905 |
| 1 | 0.02381 |
| 2 | 0.047619 |
| 5 | 0.119048 |
| 10 | 0.238095 |
| 15 | 0.357143 |
| 20 | 0.47619 |
| 25 | 0.595238 |
| 50 | 1.190476 |
| 100 | 2.380952 |
| 250 | 5.952381 |
| 500 | 11.904762 |
| 1000 | 23.809524 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Barrel (Oil) (bbl)
Volume
Derived from the cubic metre. The litre is exactly 10⁻³ m³; US and imperial capacity units are exact multiples fixed by statute.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Gallon (US) (gal)
Volume
The US liquid gallon is exactly 231 cubic inches = 3.785 411 784 L.
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Barrel (Oil) to Gallon (US)
To convert from Barrel (Oil) (bbl) to Gallon (US) (gal), multiply the value by 42.
Formula: gal = bbl × 42
Reverse: bbl = gal × 0.0238095238
Step-by-Step Example
- Start with your value in Barrel (Oil). For example: 5 bbl
- Multiply by the conversion factor: 5 x 42
- The result is: 210 gal
Barrel (Oil) and Gallon (US) Relationship
This conversion bridges the Metric (SI) and US Customary / Imperial measurement systems, commonly required when translating scientific data, international engineering specifications, or trade standards. Since 1 Barrel (Oil) equals approximately 42 Gallon (US)s, the Barrel (Oil) represents a larger unit interval than the Gallon (US). Understanding the relationship between Barrel (Oil) and Gallon (US) is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Barrel (Oil)
The oil barrel equals 42 US gallons (about 158.987 litres) and is the global pricing unit for crude petroleum.
Fun Fact: The 42-gallon standard dates to the 1860s Pennsylvania oil rush.
Common uses of Barrel (Oil): crude oil pricing, energy statistics.
About Gallon (US)
The US gallon equals approximately 3.785 liters and is the standard unit for fuel and large liquid volumes in the United States.
Fun Fact: The US gallon is about 20% smaller than the imperial (UK) gallon.
Common uses of Gallon (US): fuel (US), beverages, swimming pools.
Frequently Asked Questions
- What is 4 Barrel (Oil) in Gallon (US)?
- 4 Barrel (Oil) equals 168 Gallon (US).
- How many Gallon (US)s are in 1 Barrel (Oil)?
- There are exactly 42 Gallon (US)s in 1 Barrel (Oil). This means the conversion factor from Barrel (Oil) to Gallon (US) is 42.
- What is the formula to convert Barrel (Oil) to Gallon (US)?
- The formula to convert Barrel (Oil) to Gallon (US) is: gal = bbl × 42. For example, to convert 10 Barrel (Oil)s to Gallon (US)s, you would multiply 10 by 42.
- What is a Barrel (Oil)?
- The oil barrel equals 42 US gallons (about 158.987 litres) and is the global pricing unit for crude petroleum.
- What is a Gallon (US)?
- The US gallon equals approximately 3.785 liters and is the standard unit for fuel and large liquid volumes in the United States.
- What are the common uses of Barrel (Oil)?
- The Barrel (Oil) is commonly used in crude oil pricing, energy statistics.
Related Volume Conversions
Cite this page
UnitConvertLab. (2026). 4 Barrel (Oil) to Gallon (US). UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/4-barrel_oil-to-gallon_us