Live Converter
Convert Liquid Measurement Online
Enter your value above to convert US barrels to gallons or vice versa.
Real-World Examples
The Uses of US Barrels to Gallons Conversion
Quantities quoted in the standard US barrel are easier to work with once converted into the more familiar gallon, especially outside industries that routinely trade by the barrel.
Verifying a Supplier's Barrel-Based Quote
A buyer who receives a price quote denominated in standard barrels can convert it into gallons to compare directly against a competing supplier's gallon-based pricing.
Checking Storage Tank Capacity Against Barrel Shipments
Facilities receiving bulk liquid shipped in standard barrels convert the total barrel count into gallons to confirm their storage tanks have enough capacity.
Scaling a Barrel-Based Recipe or Formula
Manufacturers working from an older formula specified in standard barrels convert the quantities into gallons to match modern gallon-based batching equipment.
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 × 31.5 | 31.50 gal |
| 2 bbl to gal | 2 × 31.5 | 63.00 gal |
| 3 bbl to gal | 3 × 31.5 | 94.50 gal |
| 5 bbl to gal | 5 × 31.5 | 157.50 gal |
| 10 bbl to gal | 10 × 31.5 | 315.00 gal |
| 20 bbl to gal | 20 × 31.5 | 630.00 gal |
| 50 bbl to gal | 50 × 31.5 | 1,575.00 gal |
| 100 bbl to gal | 100 × 31.5 | 3,150.00 gal |
| 500 bbl to gal | 500 × 31.5 | 15,750.00 gal |
Got Questions?
Frequently Asked Questions
How many gallons are in 1 US barrel?
1 standard US barrel equals exactly 31.5 gallons, the figure defined for general liquid commerce rather than oil or beer.
How many gallons are in 10 US barrels?
10 standard US barrels equals exactly 315 gallons, a useful benchmark when scaling bulk liquid orders.
Why is this different from an oil barrel?
The petroleum industry adopted its own separate 42-gallon standard, so converting an oil barrel figure with this 31.5-gallon ratio would give the wrong result.
Does this calculator use the US gallon specifically?
Yes, it's built around the US liquid gallon (3.785411784 liters). The UK imperial gallon is somewhat larger, so the numbers would shift slightly under that definition.