Live Converter
Convert Liquid Measurement Online
Enter your value above to convert barrels to gallons or vice versa.
Real-World Examples
The Uses of Barrels to Gallons Conversion
Oil industry figures are reported in barrels, but downstream fuel sales, storage tanks, and consumer-facing numbers are almost always expressed in gallons.
Translating Crude Oil Production Figures
Journalists and analysts reporting on national or global crude oil production totals, published in barrels, convert those figures into gallons to give readers a more familiar frame of reference.
Refinery Output Planning
Refineries that receive crude oil in barrel-denominated shipments convert those volumes into gallons to plan downstream processing and retail fuel output.
Calculating Fuel Station Deliveries
Fuel distributors who order products by the barrel convert that quantity into gallons to confirm it matches the capacity of a gas station's underground storage tanks.
Quick Reference
Comprehensive Conversion Table
Our quick table gives you instant results, so you don't have to calculate these common values manually.
| Conversion | Formula | Result (gal) |
|---|---|---|
| 1 bbl to gal | 1 × 42.00000000000001 | 42.00 gal |
| 5 bbl to gal | 5 × 42.00000000000001 | 210.00 gal |
| 10 bbl to gal | 10 × 42.00000000000001 | 420.00 gal |
| 50 bbl to gal | 50 × 42.00000000000001 | 2,100.00 gal |
| 100 bbl to gal | 100 × 42.00000000000001 | 4,200.00 gal |
| 500 bbl to gal | 500 × 42.00000000000001 | 21,000.00 gal |
| 1,000 bbl to gal | 1,000 × 42.00000000000001 | 42,000.00 gal |
| 5,000 bbl to gal | 5,000 × 42.00000000000001 | 210,000.00 gal |
| 10,000 bbl to gal | 10,000 × 42.00000000000001 | 420,000.00 gal |
Got Questions?
Frequently Asked Questions
How many gallons are in 1 barrel?
1 petroleum barrel equals exactly 42 gallons, since the barrel is defined as precisely that many US gallons.
How many gallons are in 100 barrels?
100 barrels equals exactly 4,200 gallons, a figure often used when scaling up oil shipment or storage volumes for retail-level reporting.
What's the origin story behind the 42-gallon barrel standard?
It dates back to the 1800s US oil industry, where wooden barrels were standardized at 42 gallons to account for expansion and minor leakage during shipping, and the figure simply stuck around.
Does this 42-gallon figure apply to barrels of other liquids too?
No, that's specific to petroleum. Beer barrels and barrels used for other goods are defined at different standard volumes, so don't mix them up with this one.