Convert barrels to US gallons

1 bbl=42gal (US)

Use the converter below to change any barrels value into US gallons instantly — with formula, conversion table, and real-world examples.

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Conversion formula

Forward

US gallons = barrels × 42

Reverse

barrels = US gallons × 0.02381

Example: 10 bbl × 42 = 420 gal (US).

About both units

From

Barrel

bbl

The oil barrel equals 158.987 litres or 42 US gallons. It is the global pricing unit for crude oil and petroleum products. The US dry barrel (115.6 L) and UK beer barrel (163.7 L) are different units that share the same name.

Real-world: Brent crude and WTI oil are priced in US dollars per barrel. Global oil demand is about 100 million barrels per day.

Read full barrel reference →

US Gallon

gal (US)

The US gallon equals 3.785411784 litres exactly. It is the standard fuel and liquid volume unit in the United States. A typical American car holds 14–18 US gallons of fuel. US fuel economy is quoted in miles per US gallon (mpg).

Real-world: US car tank ≈ 15 gallons (57 L). 1 US gallon of milk is a common grocery size (3.79 L). US paint often sold by the gallon.

Read full us gallon reference →

Barrel to US Gallon conversion table

Common barrels to US gallons values for quick reference.

Barrel (bbl)	US Gallon (gal (US))
1 bbl	42 gal (US)
2 bbl	84 gal (US)
5 bbl	210 gal (US)
10 bbl	420 gal (US)
20 bbl	840 gal (US)
50 bbl	2,100 gal (US)
100 bbl	4,200 gal (US)
200 bbl	8,400 gal (US)
500 bbl	21,000 gal (US)
1,000 bbl	42,000 gal (US)

Tips & common mistakes

Quick tips

1 oil barrel = 42 US gallons = 158.987 L exactly.
Barrel prices quoted in USD — watch currency impact on non-US economies.
Different industries (beer, dry goods) use different barrel sizes — oil barrel is a specific unit.

Avoid these

Using beer barrel (163.7 L) or dry barrel (115.6 L) in oil contexts.
Confusing barrel of oil with barrel of beer — different volumes.
Assuming barrels are standard worldwide — only oil industry uses the 42 gallon version globally.

Frequently asked questions

How many US gallons in a barrel?

One barrel equals 42 US gallons.

How do I convert barrels to US gallons?

Multiply the barrel value by 42 to get the equivalent in US gallons.

What is 100 barrels in US gallons?

100 barrels equals 4,200 US gallons.

Is a barrel bigger than a us gallon?

Yes. 1 barrel equals 42 US gallons, so one barrel is larger.

How to convert barrels to US gallons without a calculator?

Multiply by 42 for a quick estimate; use a calculator for precise results.

Related volume conversions

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