Originally Posted by Apendecto
Cool. Good to know.
So when a bottle says 100 IBU's or whatever, do they mean finished beer IBU?
Yeah I don't think there is a requirement for breweries to list IBUs at all, let alone what kind of value it is. Generally, I would think that larger breweries will test the final beer and provide an average of those results. I am pretty sure Stone's IBU numbers are measured values of the final beer, and would think that Sierra Nevada, Sam Adams, etc. would be the same.
But the above post is correct, testing of final beers is prohibitively expensive for us. I think WhiteLabs has an annual event where they open up their testing capabilities to the public, and it is still something like $150 for a single test. Get to know the IBU number your software is giving you and relate it to the taste of your beer, maybe even comparing bitterness to a commercial beer. That will allow you to fine-tune your beers to a bitterness level you are shooting for.