Convert volume units — liters, gallons, cups, milliliters, cubic meters, barrels and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 bbl | 0.0419999 gal | |
| 0.01 bbl | 0.419999 gal | |
| 0.1 bbl | 4.19999 gal | |
| 1 bbl | 41.9999 gal | |
| 5 bbl | 210 gal | |
| 10 bbl | 419.999 gal | |
| 50 bbl | 2100 gal | |
| 100 bbl | 4199.99 gal | |
| 1000 bbl | 41999.9 gal |
Common oil barrel values converted to us gallon — factor: 1 bbl = 42 gal
| Oil Barrel (bbl) | US Gallon (gal) | Context |
|---|---|---|
| 0.001 bbl | 0.042 gal | Small batch |
| 0.01 bbl | 0.42 gal | Test batch |
| 0.1 bbl | 4.2 gal | Small drum |
| 0.5 bbl | 21 gal | Half barrel |
| 1 bbl | 42 gal | Oil barrel |
| 5 bbl | 210 gal | Small tank |
| 10 bbl | 420 gal | Small batch |
| 50 bbl | 2,100 gal | Tanker truck |
| 100 bbl | 4,200 gal | Small storage |
| 500 bbl | 2.1e+04 gal | Pipeline batch |
| 1,000 bbl | 4.2e+04 gal | Small reserve |
| 5,000 bbl | 2.1e+05 gal | Tank farm |
| 1e+04 bbl | 4.2e+05 gal | Tank farm |
| 1e+05 bbl | 4,200,000 gal | Day output |
| 1,000,000 bbl | 42,000,000 gal | Supertanker |
Converting oil barrel to us gallon comes up frequently in cooking, chemistry, medicine, and engineering. A recipe written in metric units may need to be adapted for a kitchen using us gallon, or a laboratory protocol may specify volumes in oil barrel that need to be measured with equipment calibrated in us gallon.
In everyday use, knowing that 5 bbl = 210 gal and 10 bbl = 420 gal covers most common situations. For bulk calculations, 100 bbl = 4200 gal is a useful anchor. The reverse conversion — us gallon back to oil barrel — uses the factor 0.02381, so 1 gal = 0.02381 bbl.
All conversions use the internationally recognized factor of exactly 1 bbl = 42 gal. Calculations are performed in IEEE 754 double-precision floating point, giving accuracy to at least 8 significant figures — more than sufficient for any practical application.
Formula: US Gallon = Oil Barrel × 41.999942
Multiply any oil barrel value by 41.999942 to get us gallon. One oil barrel equals 41.999942 gal.
Reverse: Oil Barrel = US Gallon × 0.023809557
Barrels × 42 = US gallons. One barrel = exactly 42 US gallons.
0.5 bbl = 21 gal, 2 bbl = 84 gal.
US gallons ÷ 42 = barrels.
Calculates crude oil reserves, production rates, and pipeline throughput in barrels per day.
Prices oil futures denominated in USD per barrel on NYMEX and ICE exchanges.
Tracks feedstock intake and product output in barrels per stream-day.
Reports strategic petroleum reserve levels and OPEC quota compliance in millions of barrels.
Converts barrel quantities to liters for reactor sizing and process design calculations.
Compares global oil demand forecasts from IEA and EIA expressed in barrels per day.
The US oil barrel (bbl) is defined as exactly 42 US gallons, equal to 158.987 liters. The 42-gallon standard was adopted by the Pennsylvania oil industry in 1866, based on the wine tierce barrel.
Oil barrels are the global benchmark for crude oil pricing: NYMEX WTI and ICE Brent futures are quoted in USD per barrel. OPEC quotas and national reserves are all expressed in barrels per day.
Interesting fact: No physical barrels are used to ship crude oil today. The unit is purely a pricing and accounting convention; tankers carry millions of barrels in sealed tanks.
The US liquid gallon is defined as exactly 231 cubic inches, or 3.785411784 liters. It traces its origins to the Queen Anne wine gallon of 1707, which American colonies adopted.
The US gallon differs from the UK Imperial gallon by about 16.5%. This matters for fuel economy: a US MPG figure is lower than the equivalent UK MPG for the same car.
Interesting fact: The United States, Liberia, and Myanmar are the only countries using the US gallon as a primary everyday volume unit.