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Barrel to Gallon Converter

Enter the value that you want to convert barrel (bbl) to gallon (gal) or gallon to barrel.Also written as BBL to GAL conversion.

1 barrel = 42.0000000 gallon

Formula: gallon = barrel value × 42.0000000

BBL to GAL — barrel to gallon

bbl
420.00000gal

10 barrel = 420.00000 gallon

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How Barrel Relates to Gallon

What is Barrel?

Barrel (bbl) is a unit of volume measurement. 1 barrel is equal to 42.0000000 gallon.

The Gallon Explained

Gallon (gal) is a unit of volume measurement. 1 gallon is equal to 0.0238095 barrel.

Volume Measurement Systems

Volume units are particularly confusing because the US and UK gallons differ (US gallon = 3.785 L, UK gallon = 4.546 L), as do their pints, cups, and fluid ounces. Cooking, fuel economy, beverage production, and pharmaceutical compounding all require precise volume conversions. Laboratory work uses milliliters and liters while US recipes specify cups, tablespoons, and fluid ounces.

barrel to gallon metric conversion table

0.01 bbl=0.42000 gal
0.1 bbl=4.20000 gal
1 bbl=42.00000 gal
2 bbl=84.00000 gal
3 bbl=126.00000 gal
4 bbl=168.00000 gal
5 bbl=210.00000 gal
6 bbl=252.00000 gal
7 bbl=294.00000 gal
8 bbl=336.00000 gal
9 bbl=378.00000 gal
10 bbl=420.00000 gal
11 bbl=462.00000 gal
12 bbl=504.00000 gal
13 bbl=546.00000 gal
14 bbl=588.00000 gal
15 bbl=630.00000 gal
16 bbl=672.00000 gal
17 bbl=714.00000 gal
18 bbl=756.00000 gal
19 bbl=798.00000 gal
20 bbl=840.00000 gal
30 bbl=1260.00000 gal
40 bbl=1680.00000 gal
50 bbl=2100.00000 gal
60 bbl=2520.00000 gal
70 bbl=2940.00000 gal
80 bbl=3360.00000 gal
90 bbl=3780.00000 gal
100 bbl=4200.00000 gal
200 bbl=8400.00000 gal
300 bbl=12600.00000 gal
400 bbl=16800.00000 gal
500 bbl=21000.00000 gal
600 bbl=25200.00000 gal
700 bbl=29400.00000 gal
800 bbl=33600.00000 gal
900 bbl=37800.00000 gal
1000 bbl=42000.00000 gal

How to Convert BBL to GAL (Barrel to Gallon)?

We can convert barrel to gallon by using an example.

Example:

Convert 20 Barrel to Gallon?

We know 1 Barrel = 42.0000000 gallon; 1 Gallon = 0.0238095 barrel.

20 barrel = ___gal

20 × 42.0000000 = 840.00000 gal (we know 1 barrel = 42.0000000 gallon)

Answer:

20 barrel = 840.00000 gallon

How to Convert Barrels to US Gallons (Step-by-Step)

In the petroleum industry, one barrel equals exactly 42 US gallons. This fixed relationship is the foundation of oil industry measurements and pricing. The barrel-to-gallon conversion is essential for understanding fuel supply chains, storage capacity, and refinery output.

  1. Identify the barrel type (petroleum = 42 US gallons is standard).
  2. Multiply the number of barrels by 42 for petroleum barrels.
  3. For US beer barrels: multiply by 31.
  4. The result is US gallons.
💡 Tip: For oil industry: 1 barrel = 42 gallons exactly. But a barrel of crude oil yields about 45 gallons of refined products because processing causes volume expansion (called "processing gain"). This is why refinery output exceeds input volume.

Barrels to US Gallons Reference

Petroleum and other barrel types converted to US gallons:

BarrelGallon
1 petroleum barrel42 US gal
1 US beer barrel31 US gal
1 whiskey barrel53 US gal
10 petroleum barrels420 US gal
100 petroleum barrels4,200 US gal
1,000 petroleum barrels42,000 US gal
500,000 petroleum barrels21 million gal
2,000,000 petroleum barrels84 million gal

Solved Examples: Barrels to Gallons

Question 1: A US refinery processes 250,000 barrels per day. How many gallons of crude?

Solution:

Gallons = barrels × 42

= 250,000 × 42

= 10,500,000 gallons per day

Answer: 250,000 barrels/day = 10.5 million gallons/day of crude input.

Question 2: A home heating oil tank holds 275 gallons. How many barrels is that?

Solution:

Barrels = gallons ÷ 42

= 275 ÷ 42

= 6.55 barrels

Answer: A 275-gallon tank = 6.55 barrels.

Question 3: A craft brewery produces 15 barrels per batch. How many gallons?

Solution:

Gallons = 15 × 31 (US beer barrel)

= 465 gallons

Answer: 15 beer barrels = 465 gallons (about 3,720 pints).

Practice Questions

Try solving these on your own to test your understanding:

  1. Convert 75 petroleum barrels to gallons. (Answer: 3,150 gal)
  2. A pipeline moves 500,000 barrels/day. Gallons per day? (Answer: 21 million gal)
  3. How many petroleum barrels in 1,000 gallons? (Answer: 23.81 barrels)
  4. A bourbon warehouse holds 20,000 barrels (53 gal each). Total gallons? (Answer: 1,060,000 gal)
  5. Convert 5 beer barrels to gallons. (Answer: 155 gal)

What You Get from One Barrel of Crude Oil

One 42-gallon barrel of crude oil produces approximately: 19-20 gallons of gasoline, 11-12 gallons of diesel/heating oil, 4 gallons of jet fuel, and 7-8 gallons of other products (LPG, asphalt, lubricants, petrochemicals). The total output exceeds 42 gallons (usually 44-45) due to "refinery gain" — processing increases the volume. About 2 gallons are lost as refinery fuel consumed during processing.

Oil Storage and the Strategic Petroleum Reserve

The US Strategic Petroleum Reserve (SPR) can hold 714 million barrels (30 billion gallons) in salt caverns along the Gulf Coast. Current stock is about 350 million barrels (14.7 billion gallons). At US consumption of ~20 million barrels/day (840 million gallons/day), the full SPR represents about 36 days of total national supply. Underground salt dome caverns are used because they are stable, cheap, and naturally sealed.

Key Takeaways

  • 1 petroleum barrel = 42 US gallons (exactly).
  • 1 US beer barrel = 31 gallons; 1 whiskey barrel = 53 gallons.
  • 1 barrel of crude → ~20 gallons gasoline + ~12 gallons diesel + other products.
  • US uses ~20 million barrels/day = 840 million gallons/day.
  • Processing gain: 42 gallons of crude yields ~45 gallons of products.
  • The barrel was standardized in 1866 based on the old English wine tierce.

Barrel to Gallon Conversion Formula

gallon = barrel × 42.0000000

1 barrel = 42.0000000 gallon

1 gallon = 0.0238095 barrel

Reverse: barrel = gallon × 0.0238095

Frequently Asked Questions

How many gallon are in 1 barrel?

There are 42.0000000 gallon in 1 barrel. To convert barrel to gallon, multiply the value by 42.0000000.

How do I convert barrel to gallon?

Multiply your barrel value by 42.0000000 to get the equivalent in gallon. For example, 5 barrel = 5 × 42.0000000 = 210.00000 gallon.

How do I convert gallon to barrel?

Multiply your gallon value by 0.0238095 to get the equivalent in barrel. Alternatively, divide by 42.0000000.

What is 10 barrel in gallon?

10 barrel is equal to 420.00000 gallon.

What is 100 barrel in gallon?

100 barrel is equal to 4200.00000 gallon.