We Asked A Cicerone: Here's How To Choose The Best Type Of IPA Beer For You - Tasting Table
Briefly

"I divide IPAs into three parts: bitterness, sweetness, and aroma. If you are worried about IPAs being too bitter, there is actually a measurement to help guide you, the bitterness is often expressed in IBUs (International Bitterness Units)."
"Above 45 IBU is where beers get quite bitter. Even with a numbered scale like IBUs, a lot is going to affect the taste of your IPA. IPAs are a balance of bitterness and sweetness."
Read at Tasting Table
[
|
]