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Old 01-11-2011, 06:03 PM   #1
donjonson
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Default do you trust beer clculus?

I am curious because I am not sure that I do. It says the ppg for gambrinus honey malt is 28. Does it take into account that honey malt is mostly unfermentable? Also i enyered in a recipe from a lhbs and ts ibu prediction is way off from what a recipe reports. Which do I trust?

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Old 01-11-2011, 06:16 PM   #2
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I dunno about the malt but there are different formulas for figuring out IBU's. If the recipe uses one formula and the program uses a another one that could by why they are different. Most beer programs have a setting where you can say what formula to use, so you can set it to match the recipe. If the recipe tells you what formula at least.

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Old 01-11-2011, 06:22 PM   #3
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Originally Posted by donjonson View Post
I am curious because I am not sure that I do. It says the ppg for gambrinus honey malt is 28. Does it take into account that honey malt is mostly unfermentable?
Fermentable or non-fermentable... it doesn't matter. Those ppg numbers are for estimating OG contributions to a beer. I would ignore any estimated FG number. There are too many factors that go into FG for any software to estimate it for you.


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Also i enyered in a recipe from a lhbs and ts ibu prediction is way off from what a recipe reports. Which do I trust?
I recall seeing and questioning IBU numbers from Beer Calculus on more than one occasion. I was never able to get ProMash to match Beer Calculus on the IBU side of things.

I can't tell you which is correct, but I am accustomed to ProMash. When it tells me "blahblah IBU" I have a good idea what that will taste like because of experience.
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