What IBU range signifies moderate bitterness in a beer?

The range of 10-20 IBU (International Bitterness Units) is recognized as representing moderate bitterness in beer. This category typically encompasses beers that offer a noticeable bitterness without overwhelming the other flavor qualities. Beers within this range often provide a balanced taste experience, allowing for malt sweetness and hop bitterness to complement each other effectively.

At the lower end of the scale, 0-10 IBU would be considered low bitterness, suitable for styles like light lagers or wheat beers, which have little hop character. Conversely, the higher ranges, such as 40-60 IBU and 30-50 IBU, indicate much more pronounced bitterness, often found in robust hoppy styles like IPAs or double IPAs. Therefore, the 10-20 IBU range strikes the right balance to be classified as moderate.