Understanding Imperial Quarts to US Oil Barrels Conversion
An Imperial quart is a British volume unit of about 1.1365 litres, one-quarter of an Imperial gallon. A US oil barrel is the standard petroleum-industry measure equal to 42 US gallons, or about 158.987 litres. Converting quarts to oil barrels is useful when small laboratory or sample volumes need to be scaled up to the barrel units used in fuel trading and production reporting.
Conversion Formula
To convert Imperial Quarts to US Oil Barrels, multiply by this factor:
Step-by-Step Example
Convert 25 Imperial Quarts to US Oil Barrels.
How to Convert Imperial Quarts to US Oil Barrels
Scaling Imperial quarts up to petroleum barrels is a single multiplication.
- Record quarts: Note the volume in Imperial quarts.
- Multiply: Multiply by 0.007148511 to get US oil barrels.
- Reverse if needed: Multiply barrels by 139.8893 to return to Imperial quarts.
- Worked result: 25 Imperial quarts × 0.007148511 = 0.178713 US oil barrels.
Imperial Quarts to US Oil Barrels conversion table
| Imperial Quarts (imp-qt) | US Oil Barrels (bbl) |
|---|---|
| 0 | 0 |
| 1 | 0.007148511 |
| 2 | 0.01429702 |
| 3 | 0.02144553 |
| 4 | 0.02859405 |
| 5 | 0.03574256 |
| 6 | 0.04289107 |
| 7 | 0.05003958 |
| 8 | 0.05718809 |
| 9 | 0.0643366 |
| 10 | 0.07148511 |
| 15 | 0.1072277 |
| 20 | 0.1429702 |
| 25 | 0.1787128 |
| 30 | 0.2144553 |
| 40 | 0.2859405 |
| 50 | 0.3574256 |
| 60 | 0.4289107 |
| 70 | 0.5003958 |
| 80 | 0.5718809 |
| 90 | 0.643366 |
| 100 | 0.7148511 |
| 150 | 1.072277 |
| 200 | 1.429702 |
| 250 | 1.787128 |
| 300 | 2.144553 |
| 400 | 2.859405 |
| 500 | 3.574256 |
| 600 | 4.289107 |
| 700 | 5.003958 |
| 800 | 5.718809 |
| 900 | 6.43366 |
| 1000 | 7.148511 |
| 2000 | 14.29702 |
| 3000 | 21.44553 |
| 4000 | 28.59405 |
| 5000 | 35.74256 |
| 10000 | 71.48511 |
| 25000 | 178.7128 |
| 50000 | 357.4256 |
| 100000 | 714.8511 |
| 250000 | 1787.128 |
| 500000 | 3574.256 |
| 1000000 | 7148.511 |
Which quart do you mean?
“quart” means different units by region. This page uses the Imperial quart (UK). 1 US Oil Barrels in each:
| Definition | Result |
|---|---|
| US quart 946 mL | 0.005952381 bbl |
| Imperial quart (UK) 1.137 L | 0.007148511 bbl (this page) |
What is the Imperial Quart?
The imperial quart is a unit of volume in the British imperial system, equal to one quarter of an imperial gallon. It is used in the United Kingdom and some Commonwealth countries for measuring liquids such as milk, beer, and oil.
Definition
An imperial quart is defined as exactly one quarter of an imperial gallon, or equivalently two imperial pints. Since the imperial gallon is exactly 4.54609 litres, the imperial quart follows directly:
Expressed exactly, one imperial quart equals 1.1365225 litres (1136.5225 mL), or 40 imperial fluid ounces.
Origin and History
The quart descends from the Latin quartus ("a fourth"), reflecting its status as a quarter of a gallon. Quarts existed in various English measures for centuries, but the modern imperial quart was fixed by the British Weights and Measures Act of 1824, which defined the imperial gallon and standardised the pint and quart that derive from it. This replaced the older, differing wine and ale gallons used previously.
Law and Notable Facts
The imperial quart remains a legal unit of measure in the United Kingdom, though metric units are now standard for most trade. It is notably larger than the US liquid quart: the imperial quart is about 1.1365 L while the US liquid quart is roughly 0.9464 L, making the imperial quart approximately 20% larger. This difference stems from the imperial and US systems adopting different gallon definitions.
Real-World Examples and Conversions
- One imperial quart of milk is about 1.137 litres, slightly more than a standard 1-litre carton.
- A recipe calling for 2 imperial quarts of stock needs roughly 2.273 litres.
- One imperial quart equals 40 imperial fluid ounces, versus 32 US fluid ounces in a US quart.
- Four imperial quarts make exactly one imperial gallon (4.54609 L).
What is the US Oil Barrel?
The US oil barrel (bbl) is a unit of volume equal to 42 US gallons, used almost exclusively for crude oil and petroleum products. It is the standard trading unit of the global oil industry.
Definition
The US oil barrel is defined as exactly 42 US liquid gallons:
Precisely, 1 bbl = 158.987294928 liters. This differs from other "barrel" definitions: the US fluid barrel is 31.5 gallons, the US federal beer barrel is 31 gallons, and the UK barrel is about 163.66 liters.
Origin and History
The 42-gallon standard traces to the early Pennsylvania oil boom of the 1860s. Producers adopted the 42-gallon "tierce" wooden barrel, which was slightly larger than the common 40-gallon whiskey barrel, allowing for spillage and evaporation losses during transport. In 1872 the Petroleum Producers Association formalized 42 gallons as the standard, and it endures today even though oil is now moved by pipeline and tanker rather than in physical barrels.
Law and Notable Facts
The oil barrel is not an SI unit but is deeply embedded in commodity markets, where crude prices are quoted per barrel and production in barrels per day (bbl/d). The abbreviation "bbl" is thought to stand for "blue barrels" once used by Standard Oil. Physical 42-gallon barrels are rarely used in the modern industry.
Real-World Examples and Conversions
- 1 bbl = 42 US gallons ≈ 34.97 imperial gallons ≈ 158.99 liters.
- Global crude oil consumption is roughly 100 million barrels per day.
- A single barrel of crude yields about 19 to 20 US gallons of gasoline after refining.
- 1 metric ton of crude oil is roughly 7.33 barrels, depending on density.
Frequently Asked Questions
How many US oil barrels are in an Imperial quart?
One Imperial quart equals just 0.007148511 US oil barrels, because a barrel (42 US gallons, ~158.987 L) is far larger than a quart.
How do I convert Imperial quarts to US oil barrels?
Multiply the quart value by 0.007148511. For example, 100 Imperial quarts equal about 0.71485 US oil barrels.
How many Imperial quarts make one US oil barrel?
About 139.8893 Imperial quarts fill one US oil barrel, which is the reciprocal of the forward factor.
Why is the oil barrel set at 42 gallons?
The 42-US-gallon barrel became the petroleum standard in the 19th-century US oil industry and remains the unit used for crude oil pricing and production statistics.
Can I use this conversion for crude oil volumes?
Yes, though petroleum is usually measured directly in barrels; this conversion is handy when small sample volumes recorded in quarts must be reported in barrels.