To convert imperial gallons to oil barrels, multiply by 0.02859404585.
The calculation uses 1 gal = 0.02859404585 bbl. Results are displayed to at most 10 significant digits. Definitions can be exact while a displayed decimal is rounded. Match the displayed precision to your original measurement.
The formula
value in bbl = value in gal × 0.02859404585
gal- Input unit: imperial gallons
bbl- Output unit: oil barrels
How to use this calculator
- Enter a value in gal.
- Multiply by the stored conversion factor.
- Read the result in bbl; divide by the same factor to convert back.
Worked examples
Worked conversion
1 gal × 0.02859404585 ≈ 0.02859404585 bbl.
Reverse conversion
0.02859404585 bbl ÷ 0.02859404585 ≈ 1 gal. Rounding intermediate values can change the last displayed digit.
Frequently asked questions
What factor does this converter use?
It uses 0.02859404585 bbl per gal.
Why can another converter show a slightly different answer?
Check the unit convention first (such as US versus Imperial or decimal versus binary), then compare rounding. Measurement uncertainty is separate from the unit conversion.
gal to bbl table
| gal | bbl (rounded) |
|---|---|
| 0 | 0 |
| 1 | 0.02859404585 |
| 2 | 0.05718809169 |
| 5 | 0.1429702292 |
| 10 | 0.2859404585 |
| 100 | 2.859404585 |
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