The question is I boil hops for say 60 and the software estimates 30 IBU. How much will that original 30 IBU increase during a 30 or 45-minute whirlpool if the temperature remains above 180 degrees. I like to add hops after flameout and just wondering how much of an increase that original 30 IBU would get. Would I be safe to assume that the calculated time for the original 60 boil plus 30-minute whirlpool would equal or be close to 90 minutes worth of boil when formulating in beersmith2?