IBU

Beer experts produce a number for each beer called IBU - international bittering units. Most beers are in the 10-30 range. If you ever have a semi-decent IPA it will get into the 60s or higher. Some experts say that if the IBU gets above 87 or so you can't taste the difference anymore. 87 will taste just as bitter as 95 or 110. I once had a beer with an IBU of 120. I'm the 120 IBU beer.