Dry Hopping and IBU's plus adding Lactic to reduce PH when Dry Hopping

[Sadfield]

The big thing for me is the loss of IBU's through fermentation. 30-50% loss during fermentation from different breweries and beers, I really don't know how a calculator can work with that variable.

 

[6Trails]

I’m really interested in this and always found it strange that I’ve never come across a calculator like - finished ph, volume, desired ph = x amount of acid. Everything I’ve ever seen involves micro dosing a glass of beer.