Convert US Gallon to Imperial Barrel
Convert us gallons to imperial barrels instantly. 1 us gallon = 0.0231298385 imperial barrel — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Imperial Barrel to US Gallon converter for the reverse conversion.
Units explained
US Gallon
The US liquid gallon is defined as exactly 231 cubic inches (3.785411784 liters).
Based on the English wine gallon of 231 cubic inches, retained by the US after 1824.
The primary US unit for fuel, milk and large beverage containers.
English wine gallon; US since 1824.
Imperial Barrel
An imperial barrel is 36 imperial gallons (163.659 L).
A British trade barrel, notably for beer.
Used in UK brewing.
UK trade standard.
US Gallon to Imperial Barrel conversion formula
The relationship between us gallons and imperial barrels:
To convert us gallons to imperial barrels, multiply the value in us gallons by 0.0231298385. To reverse, multiply imperial barrels by 43.2341973182.
How to use this converter
Type a value into the calculator. The result in imperial barrels updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Imperial Barrel to US Gallon converter for the reverse direction.
Step-by-step: convert us gallons to imperial barrels
- Write down the value in us gallons (gal).
- Multiply that value by the factor 0.0231298385.
- The product is the equivalent value in imperial barrels (bbl).
- To reverse, multiply the imperial barrel value by 43.2341973182.
Worked examples
Example 1 — Convert 1 gal to bbl:
1 × 0.0231298385 = 0.0231298385 bbl
Example 2 — Convert 100 gal to bbl:
100 × 0.0231298385 = 2.3129838462 bbl
Real-world example — Children's height milestones
A 150-us gallon-tall child measures a value in imperial barrels that's commonly used for theme-park ride height requirements when travelling between countries that use different measurement units.
150 gal × 0.0231298385 = 3.4694757693 bbl
Real-world example — Body height conversion
You enter your height as 180 us gallons into an international job or visa application. The form then asks for the same value in imperial barrels — converting between these adjacent units is one of the most-used length conversions globally.
180 gal × 0.0231298385 = 4.1633709231 bbl
Real-world example — Furniture and large objects
A 72-us gallon piece of furniture converts to a value in imperial barrels that's easier to mentally compare with room dimensions. This is the typical workflow when shopping internationally and product specs use a different unit than your room measurements.
72 gal × 0.0231298385 = 1.6653483693 bbl
US Gallon to Imperial Barrel conversion table
Standard reference values for converting us gallons to imperial barrels:
| US Gallon [gal] | Imperial Barrel [bbl] |
|---|---|
| 0.01 | 0.0002312984 |
| 0.1 | 0.0023129838 |
| 1 | 0.0231298385 |
| 2 | 0.0462596769 |
| 3 | 0.0693895154 |
| 4 | 0.0925193538 |
| 5 | 0.1156491923 |
| 10 | 0.2312983846 |
| 20 | 0.4625967692 |
| 30 | 0.6938951539 |
| 40 | 0.9251935385 |
| 50 | 1.1564919231 |
| 100 | 2.3129838462 |
| 500 | 11.564919231 |
| 1000 | 23.1298384619 |
Frequently asked questions
How many imperial barrels is 1 us gallon?
How do I convert us gallons to imperial barrels?
How do I convert imperial barrels back to us gallons?
How many imperial barrels is 100 us gallons?
Popular volume unit conversions
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Metric / SI (15 units)
US Customary (Liquid) (14 units)
US Customary (Dry) (5 units)
Imperial (UK) (14 units)
Cubic (length-derived) (4 units)
Cooking / Culinary (5 units)
Sources & references
Conversion factor (1 gal = 0.0231298385 bbl) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.