From TheBestLinks.com
(Redirected from
IBU scale)
The hoppy character of beer is measured by the International Bitterness Units scale, or IBU scale for short. An IBU is one part per million of isohumulone. The higher number, the greater the bitterness.
A light American lager might be as low as 5 on the IBU scale. At the other extreme, a barley wine can range up to 100. Other examples:
One formula craft brewers use to calculate IBU is
hop weight × AA% × utilization × volume × 1.34
where
- hop weight refers to the weight of the hops used in ounces.
- AA% refers to the alpha acid percentage, which is influenced by many factors, including method of cultivation, species, and time of year. Hops are often sold labeled with this percentage.
- utilization is the percentage of Alpha acid that is actually used during the boiling process.
- volume means the volume of the wort in gallons.
- the constant (1.34) adjusts the measurement to account for the use of U.S. customary units.
Related links
Top visited
0 of
0 links
[no links posted yet]
>> place link >>
Discussion
Last posted
0 of
0 messages
[no messages posted yet]
>> post message >>
Watch
You can
add this article to your own "watchlist" and receive e-mail notification about all changes in this page.
