Convert one barrel (petroleum) to gallons (US)

Explanation

To convert one barrel (petroleum) to gallons (US) all we need is to know the conversion factor and we are done. Luckily, we can compute that factor using the units' definitions below.

The result is that there are 42 gallons (US) in 1 barrel (petroleum).

Formula

1 bbl = 42 gal

barrels (petroleum)bbl

dimension	volume
system	U.S. customary units (USCS)
symbol	bbl
synonyms	oil barrels

The barrel of petroleum (bbl) is a unit of volume in the U.S. customary units.

Definition of the barrel

There are 42 US gallons in one barrel of petroleum.

NIST Guide to the SI, Appendix B.9

Value in terms of the SI

One barrel is equivalent to 158987.294928 cubic centimeters.

Equivalences

One barrel of petroleum is also equivalent to:

History

The barrel of petroleum is of unknown origin. If you are intested, you can read more on that here.

US fluid volume units

minim	min
fluid dram	fl dr	60 minims
fluid ounce	fl oz	8 fluid drams
gill	gi	4 fluid ounces
pint	pt	4 gills
quart	qt	2 pints
gallon	gal	4 quarts
barrel	bbl	31.5 gallons
barrel (petroleum)	bbl	42 gallons

The United States Customary System

The United States customary system is a system of measurements used in the United States since 1832. It is based on English units in use before the definition of the Imperial system in 1824.

With the Metric Conversion Act of 1975 the U.S. began a metrication program but customary units are still widely used.

gallons (US)gal

dimension	volume
system	U.S. customary units (USCS)
symbol	gal

The gallon (gal) is a unit of volume in the U.S. customary units.

Definition of the gallon

One gallon is equal to 231 cubic inches.

NIST Handbook 44 Specifications: Appendix C p. C-5

Value in terms of the SI

One gallon is equivalent to 3785.411784 cubic centimeters.

Equivalences

One US gallon is also equivalent to:

Some Facts

In the US, oil (petroleum) is priced per gallon. We also have to mention the very famous gallon of milk. In the rest of the world, the liter is prefered for the same usage.

US fluid volume units

minim	min
fluid dram	fl dr	60 minims
fluid ounce	fl oz	8 fluid drams
gill	gi	4 fluid ounces
pint	pt	4 gills
quart	qt	2 pints
gallon	gal	4 quarts
barrel	bbl	31.5 gallons
barrel (petroleum)	bbl	42 gallons

The United States Customary System

The United States customary system is a system of measurements used in the United States since 1832. It is based on English units in use before the definition of the Imperial system in 1824.

With the Metric Conversion Act of 1975 the U.S. began a metrication program but customary units are still widely used.