Volume
gal (UK)tobbl
Convert imperial gallons (gal (UK)) to oil barrels (42 US gal) (bbl).
Factor1 gal (UK) = 0.02859405 bbl
Converter
gal (UK)
Accepts numbers or expressions, e.g. 150 + 14.7
Result
bbl
Rendered to 6 significant figures.
Formula
Formula
bbl = gal (UK) × 0.02859405
Multiply any value in imperial gallons by 0.02859405 to obtain the value in oil barrels (42 US gal).
Worked example
Convert 100 gal (UK) to bbl.
- 01Start with 100 gal (UK).
- 02Multiply by the conversion factor: 100 × 0.02859405 = 2.8594 bbl.
Result100 gal (UK) = 2.8594 bbl
Conversion table
| gal (UK) | bbl |
|---|---|
| 1 | 0.028594 |
| 2 | 0.057188 |
| 5 | 0.14297 |
| 10 | 0.28594 |
| 20 | 0.57188 |
| 50 | 1.4297 |
| 100 | 2.8594 |
| 200 | 5.7188 |
| 500 | 14.297 |
| 1000 | 28.594 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from gal (UK) to bbl?
1 gal (UK) equals 0.02859405 bbl. To convert, multiply the value in imperial gallons by 0.02859405.
How do I convert 1 gal (UK) to bbl?
1 gal (UK) = 0.028594 bbl. For any value, multiply by 0.02859405.
How do I convert bbl back to gal (UK)?
Divide by the same factor — or equivalently, multiply by 34.97232. So 1 bbl = 34.9723 gal (UK).
When would I need to convert imperial gallon to oil barrel (42 US gal)?
Volume conversions are used for tank sizing, batch calculations, and bridging between vendor specs (gallons, barrels, ft³) and process documentation (m³, litres).
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).