Conversion Formula
$$gal = bbl \times 42$$
Multiply the value in Barrel (Oil) by 42 to get US Gallon.
bbl to gal Conversion Table
| Barrel (Oil) (bbl) | US Gallon (gal) |
|---|---|
| 0.1 | 4.2 |
| 0.5 | 21 |
| 1 | 42 |
| 2 | 84 |
| 5 | 210 |
| 10 | 420 |
| 25 | 1,050 |
| 50 | 2,100 |
| 100 | 4,200 |
| 250 | 10,500 |
| 500 | 21,000 |
| 1,000 | 42,000 |
bbl to gal in Engineering
Volume conversions are critical for concrete and earthwork quantities (cubic yards), water storage (acre-feet, million gallons), petroleum (barrels), and fluid system design (liters, gallons). Accurate volume conversion prevents costly material estimation errors.
Barrel (Oil): Standard petroleum barrel equal to 42 US gallons. Primary unit in oil and gas industry worldwide.
US Gallon: Standard US liquid volume unit. Exactly 231 cubic inches. Used for water, fuel, and chemical volumes.