Convert US Oil Barrel to Imperial Gallon
Convert us oil barrels to imperial gallons instantly. 1 us oil barrel = 34.9723157544 imperial gallon — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Imperial Gallon to US Oil Barrel converter for the reverse conversion.
Units explained
US Oil Barrel
The petroleum barrel is exactly 42 US gallons (158.987 L).
Set by the US petroleum industry in the 1860s and now a global oil-trade standard.
The standard unit for crude-oil pricing and production worldwide.
US oil industry, 1860s.
Imperial Gallon
The imperial gallon is defined as exactly 4.54609 liters.
Set by the British Weights and Measures Act of 1824 as the volume of 10 lb of water.
Used for fuel and beverages in the UK and Commonwealth.
UK, 1824.
US Oil Barrel to Imperial Gallon conversion formula
The relationship between us oil barrels and imperial gallons:
To convert us oil barrels to imperial gallons, multiply the value in us oil barrels by 34.9723157544. To reverse, multiply imperial gallons by 0.0285940458.
How to use this converter
Type a value into the calculator. The result in imperial gallons 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 Gallon to US Oil Barrel converter for the reverse direction.
Step-by-step: convert us oil barrels to imperial gallons
- Write down the value in us oil barrels (bbl (oil)).
- Multiply that value by the factor 34.9723157544.
- The product is the equivalent value in imperial gallons (gal).
- To reverse, multiply the imperial gallon value by 0.0285940458.
Worked examples
Example 1 — Convert 1 bbl (oil) to gal:
1 × 34.9723157544 = 34.9723157544 gal
Example 2 — Convert 100 bbl (oil) to gal:
100 × 34.9723157544 = 3497.2315754418 gal
Real-world example — Body height conversion (reverse direction)
You measure 1.75 us oil barrels tall and need to fill in a gym membership form or medical record that asks for height in imperial gallons. This is the most-used everyday length conversion in metric-using countries.
1.75 bbl (oil) × 34.9723157544 = 61.2015525702 gal
Real-world example — Pet and accessory dimensions
A 3-us oil barrel dog leash equals a tidy round value in imperial gallons. Pet-supply shopping frequently mixes the two units across product specifications.
3 bbl (oil) × 34.9723157544 = 104.9169472633 gal
Real-world example — Fabric and tailoring
One us oil barrel of fabric converts to a value in imperial gallons commonly used for seam allowances. Garment patterns frequently switch between the two units on a single instruction sheet.
1 bbl (oil) × 34.9723157544 = 34.9723157544 gal
US Oil Barrel to Imperial Gallon conversion table
Standard reference values for converting us oil barrels to imperial gallons:
| US Oil Barrel [bbl (oil)] | Imperial Gallon [gal] |
|---|---|
| 0.01 | 0.3497231575 |
| 0.1 | 3.4972315754 |
| 1 | 34.9723157544 |
| 2 | 69.9446315088 |
| 3 | 104.9169472633 |
| 4 | 139.8892630177 |
| 5 | 174.8615787721 |
| 10 | 349.7231575442 |
| 20 | 699.4463150884 |
| 30 | 1049.1694726325 |
| 40 | 1398.8926301767 |
| 50 | 1748.6157877209 |
| 100 | 3497.2315754418 |
| 500 | 17486.1578772088 |
| 1000 | 34972.3157544175 |
Frequently asked questions
How many imperial gallons is 1 us oil barrel?
How do I convert us oil barrels to imperial gallons?
How do I convert imperial gallons back to us oil barrels?
How many imperial gallons is 100 us oil barrels?
Popular volume unit conversions
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Metric / SI (8 units)
US Customary (Liquid) (7 units)
Imperial (UK) (4 units)
Cubic (length-derived) (3 units)
Cooking / Culinary (3 units)
Sources & references
Conversion factor (1 bbl (oil) = 34.9723157544 gal) 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 Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.