*Alpha Acids vary year to year and lot to lot, reported reflects AA% in late 2016
IBU per Addition = [AA%] x [Ounces Hops] x [Boil Time Factor]
Add the IBU from each addition for total predicted IBU
Boil Time Factor by time of hop addition:
MIN | BTF |
60+ | 4.0 |
55 | 3.5 |
50 | 3.1 |
45 | 2.7 |
40 | 2.2 |
35 | 1.8 |
30 | 1.4 |
25 | 1.2 |
20 | 1.1 |
15 | 1.0 |
10 | 0.8 |
5 | 0.7 |
Whirlpool | 0.6 |