what is ibu%
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 â 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.