How many fluid ounces are in a US liquid barrel?

One US liquid barrel equals exactly 4,032 US fluid ounces (31.5 gallons × 128 fl oz per gallon).

How do I convert fl oz to barrels manually?

Divide the number of fluid ounces by 4,032. For example, 8,064 fl oz ÷ 4,032 = 2 barrels.

What is a US liquid barrel?

A US liquid barrel is a unit of volume equal to 31.5 US gallons (about 119.24 liters). It is used for liquids other than petroleum, which uses a separate 42-gallon oil barrel.

Is this the same as an oil barrel?

No. An oil barrel is 42 US gallons (5,376 fl oz). This converter uses the US liquid barrel of 31.5 gallons (4,032 fl oz), which applies to beverages and general liquid trade.

How many fl oz is half a barrel?

Half a US liquid barrel is 2,016 fl oz (15.75 gallons). A standard US beer half-keg is slightly smaller at 1,984 fl oz (15.5 gallons).

Can I use this for beer kegs?

Yes. A full-size US keg (half-barrel) holds 1,984 fl oz (15.5 gallons), which is close to but not exactly half of a US liquid barrel. This tool uses the standard liquid barrel definition.

Fluid Ounces to Barrels Converter

Convert US fluid ounces to US liquid barrels (31.5 gal = 4,032 fl oz) and back, with a reference table for common volumes.

Fluid Ounces to Barrels

Fluid Ounces (fl oz)

Result — US Liquid Barrels (bbl)

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1 US liquid barrel = 31.5 gal = 4,032 fl oz

Or enter Barrels to get fl oz

Result — Fluid Ounces (fl oz)

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Quick Reference Table

fl oz	Barrels (bbl)	Common size

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Summary

This converter uses the US liquid barrel definition: 1 barrel equals 31.5 US gallons, which works out to exactly 4,032 US fluid ounces. Enter a fluid-ounce value to get the barrel equivalent, or enter barrels to go the other way. The reference table covers common volumes from a single shot up to several barrels so you can orient yourself quickly.

How it works

Enter the number of fluid ounces in the top input field.
The equivalent in US liquid barrels appears instantly below the input.
Use the reverse field to enter barrels and get the fl oz equivalent.
Click Copy next to any result to copy the value to your clipboard.
Consult the reference table for commonly used volumes in both units.

Use cases

Estimate how many barrels a large beverage batch fills.
Compare bulk liquid quantities between fl oz specs and barrel containers.
Convert brewing and distilling volumes listed in fluid ounces to barrel counts.
Cross-check industrial liquid orders stated in fl oz against barrel pricing.
Understand barrel-based liquid regulations that reference fluid-ounce thresholds.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu