International Bittering Units (IBU) Chart

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For those of you who want to know about beer bitterness, read below:

From Wikipedia, the free encyclopedia:

The International Bitterness Units scale, or simply IBU scale, provides a measure of the bitterness of beer, which is provided by the hops used during brewing. An IBU is one part per million of isohumulone — the higher the number, the greater the bitterness.

A light American lager might be as low as 5 on the scale, while a barley wine can range up to 100. Measures for other beverages are below.

The bittering effect is less noticeable in beers with a high quantity of malted barley, so a higher IBU is needed in heavier beers to balance the flavor. For example, an Imperial Stout may have an IBU of 50, but will taste less bitter than an English Bitter with an IBU of 30, because the first beer uses much more malt than the second. The technical limit for IBU's is around 100, others have tried to surpass this number but there is no real gauge after 100 IBUs when it comes to taste threshold.

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This list was last updated 4 April 2007.

*Hybird Beer: Brewed with either lager or ale yeast.