Lately the IBU calculator has been way off IMO. I was working on a couple new recipes. I added 16oz of 13AA chinook to a 40gal batch @ 60min, 8oz @ 30 and 8oz @10 Calculator came back at 26? WTF? Using Hopsteiner's IBU calc it came back at 120! Adjusted my hops using the hopsteiner calcs to get a figure around 50. 4.9oz at 60 and 4.9oz @20. BF calcs it at 23 Rager, Hopsteiner 51.5. Recipe is public : 49'n Holdin'. This is the 3rd recipe I have done in the last few weeks that the IBU calc is way off. I went with my gut and used what I felt was correct on the others and turned out ok. I have been brewing at home and, as of last year, professionally for about 5 years. Have always liked this app. for its easy calculations and inventory control. Please fix this!