Quote:
Originally Posted by bryman79
Hello All,
I plugged this into Beersmith and got an IBU of 55.1. A couple questions:
1. Are the numbers for the hops correct?
2. If so, what sort of hop utilization value was used?
3. Why does the hop section of the recipe show an IBU of 45.6 yet the top of the recipe shows an IBU of 49?
Thanks,
Bryan
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I've read that a human cannot percieve bitterness within 5-15 IBU's. Besides, IBU's are only an estimate at best of the real bitterness that hops add to a beer.
The hops could have had similar overall alpha acid levels but lead to a very different taste in the finished beer. Bitterness can very widely depending on the difference in Humulone and Coumulone levels. A beer made with hops high in Cohumulone will be more bitter than the IBU's might suggest.
The only way to get an accurate measurement of IBU's is to get a lab test, which is unnecessary for most home brewers.
In conclusion, there is probably no noticeable difference between 45.6 IBU's and 55.1. But if you are worried a beer might be too bitter, leave out a few grams of bittering hops.