An oil barrel is 42 US gallons.
Oil barrels to Quarts Converter — bbl to qt
Convert Oil barrel (bbl) to Quart (qt) using the exact conversion factor (1 oil barrel = 168 quart). See the formula, worked examples, conversion table, history, and common uses.
Oil barrels to Quarts converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
A US liquid quart is one quarter of a US gallon.
Result = input x 0.1589872949 / 0.000946352946.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Oil barrels to Quarts
Oil barrel and Quart appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Specifically: An oil barrel is 42 US gallons, and a US liquid quart is one quarter of a US gallon.
Formula
quarts = oil barrels × 168
This factor comes from each unit's defined relationship to the category's base unit: 1 oil barrel equals 0.158987294928 base units, and 1 quart equals 0.000946352946 base units, so dividing one by the other gives the direct oil barrel-to-quart factor of 168.
Simple example
1 bbl × 168 = 168 qt
1 oil barrel = 168 quarts.
Real-world example
10 bbl × 168 = 1,680 qt
10 oil barrels = 1,680 quarts.
Conversion table
| Oil barrel (bbl) | Quart (qt) |
|---|---|
| 1 bbl | 168 qt |
| 5 bbl | 840 qt |
| 10 bbl | 1,680 qt |
| 25 bbl | 4,200 qt |
| 50 bbl | 8,400 qt |
| 100 bbl | 16,800 qt |
Reverse conversion: Quart to Oil barrel
168 qt × 0.005952380952 = 1 bbl
168 quarts = 1 oil barrel.
oil barrels = quarts × 0.00595238095238
For a page dedicated to this direction, see Quart to Oil barrel.
Understanding the Oil barrel (bbl)
An oil barrel is 42 US gallons.
Understanding the Quart
Quart (qt) measures volume. The US liquid quart is exactly one-quarter of a US gallon: 0.946352946 liters. It is classified as a US customary unit.
Where it's used: United States (cooking, dairy, motor oil packaging)
Uses of the Quart today
- US recipe measurement (larger liquid volumes)
- US motor oil and automotive fluid packaging
- US dairy and beverage packaging (quart containers)
History of the Quart
The quart ('quarter' of a gallon) follows the same English wine-gallon lineage as the US gallon, retained by the US after England moved to a different imperial standard in 1824.
Historical origin. Quart was not the invention of a single named person; it developed through the process described above.
Quart — sources
- NIST Handbook 44, Appendix C — General tables of units including the US quart definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many quarts are in 1 oil barrel?
1 oil barrel equals 168 quarts, using the exact defined conversion factor rather than an estimate.
How do I convert oil barrel to quart?
Multiply the oil barrel value by 168. The converter above does this instantly to whatever precision you set.
How do I convert quart back to oil barrel?
Use the reverse factor: 1 quart equals 0.005952381 oil barrels. You can also use the swap control in the converter above to flip the direction instantly.
What is a oil barrel?
Oil barrel (bbl) is a unit of volume.
What is a quart?
Quart (qt) measures volume. The US liquid quart is exactly one-quarter of a US gallon: 0.946352946 liters. It is classified as a US customary unit.
Is the oil barrel to quart conversion exact?
Yes. The US liquid quart is exactly one-quarter of a US gallon: 0.946352946 liters. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.