Conversion
Oil Barrels to US gallons
1 bbl = 42 US gal, derived from exact unit definitions.
—
Swap ⇆| bbl | US gal |
|---|---|
| 1 bbl | 42.0 US gal |
| 2 bbl | 84.0 US gal |
| 5 bbl | 210.0 US gal |
| 10 bbl | 420.0 US gal |
| 25 bbl | 1,050.0 US gal |
| 50 bbl | 2,100.0 US gal |
| 100 bbl | 4,200.0 US gal |
Formula
US gallons = oil barrels × 42FAQ
How many US gallons in a oil barrel?
1 bbl = 42 US gal. Multiply your oil barrels value by 42.
Is this exact?
Yes — these factors derive from exact definitions: 1 US gallon = 231 cubic inches, 1 imperial gallon = 4.54609 liters, 1 inch = 2.54 cm, 1 barrel = 42 US gallons.
Why do tank specs mix oil barrels and US gallons?
US tank trade uses gallons and inches; engineering drawings and international suppliers use metric or cubic measures. This page bridges them without rounding drift.