Gallon (US) to Barrel (US) Converter

Volume Converter

40 units available

Decimals:

From

To

0.031746

1 gal = 0.031746 bbl (US)

Formula:

bbl (US) = gal × 0.0317460317

With your value: 1 gal = 0.03174603 bbl (US)

How big is that?

Everyday references on a logarithmic scale, all expressed in gallon (us) so you can sanity-check the result.

Milk carton (1/3.8e+3 your value)0.000264 gal

Kitchen bucket (1/3.8e+2 your value)0.00264 gal

Car fuel tank (1/76 your value)0.0132 gal

Bathtub (1/19 your value)0.0528 gal

Hot tub (1/2.5 your value)0.396 gal

Your value1.00 gal

Other Gallon (US) to Barrel (US) conversions

2 gal to bbl (US)3 gal to bbl (US)4 gal to bbl (US)5 gal to bbl (US)6 gal to bbl (US)7 gal to bbl (US)8 gal to bbl (US)

Gallon (US) to Barrel (US) Conversion Table

Gallon (US) (gal)	Barrel (US) (bbl (US))
0.5	0.015873
1	0.031746
2	0.063492
5	0.15873
10	0.31746
15	0.47619
20	0.634921
25	0.793651
50	1.587302
100	3.174603
250	7.936508
500	15.873016
1000	31.746032

Barrel (US) to Gallon (US) Conversion Table

Barrel (US) (bbl (US))	Gallon (US) (gal)
0.5	15.75
1	31.5
2	63
5	157.5
10	315
15	472.5
20	630
25	787.5
50	1,575
100	3,150
250	7,875
500	15,750
1000	31,500

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.

Gallon (US) (gal)

Volume

Exact conversion

The US liquid gallon is exactly 231 cubic inches = 3.785 411 784 L.

Source: NIST Handbook 44, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Barrel (US) (bbl (US))

Volume

Exact conversion

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

How to Convert Gallon (US) to Barrel (US)

To convert from Gallon (US) (gal) to Barrel (US) (bbl (US)), multiply the value by 0.0317460317.

Formula: bbl (US) = gal × 0.0317460317

Reverse: gal = bbl (US) × 31.5

Step-by-Step Example

Start with your value in Gallon (US). For example: 5 gal
Multiply by the conversion factor: 5 x 0.0317460317
The result is: 0.15873 bbl (US)

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: fuel (US), beverages, swimming pools.

About Barrel (US)

The barrel (us) (bbl (US)) is a unit of volume and capacity. One barrel (us) equals 119.2404712 litres. UnitConvertLab converts it against every other volume unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: volume calculations, engineering and science, education.

Frequently Asked Questions

How many Barrel (US) are in 1 Gallon (US)?

There are exactly 0.0317460317 Barrel (US) in 1 Gallon (US). This means the conversion factor from Gallon (US) to Barrel (US) is 0.0317460317.

What is the formula to convert Gallon (US) to Barrel (US)?

The formula to convert Gallon (US) to Barrel (US) is: bbl (US) = gal × 0.0317460317. For example, to convert 10 Gallon (US) to Barrel (US), you would multiply 10 by 0.0317460317.

What is a Gallon (US)?