Author Topic: Bitterness ratio  (Read 5084 times)

Offline MattFed

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Bitterness ratio
« on: March 27, 2009, 04:45:26 PM »
I may be missing something here, but where is the bitterness ratio calculated from? The reason I ask, is that I have had efficiency problems lately, and I notice that the ratio does not change when I put in the measured O.G.
For example, on a beer that was supposed to have a(predicted)  OG of 1054 the ratio on Beersmith says:
0.439 IBU/SG
When I put in the real O.G in the measured box of 1040, the ratio does not change, when it is fact now:
0.575
Is there a way of changing this to reflect the actual IBU/SG ratio?

Offline BeerSmith

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Re: Bitterness ratio
« Reply #1 on: March 27, 2009, 07:54:10 PM »
Hi,
  The bitterness ratio is calculated from the IBU and OG estimates and it is simply the IBUs/OG.  It is not calculated from the actuals.

Brad
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Offline MattFed

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Re: Bitterness ratio
« Reply #2 on: March 27, 2009, 09:25:12 PM »
So unless you are bang on the predicted, then it is inaccurate, and there's no way you can reconfigure?

Offline BeerSmith

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Re: Bitterness ratio
« Reply #3 on: March 27, 2009, 09:43:19 PM »
Not currently,
  But it is pretty easy to calculate - basically take the IBUs and divide by the OG points (which is the fractional part of the OG, so 1.053 becomes 53 points).

Cheers,
Brad
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Offline MaltLicker

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Re: Bitterness ratio
« Reply #4 on: March 29, 2009, 07:09:37 PM »
Well, what I do after the brew is update my efficiency % to make the calculated OG match what I measured and entered as actuals.

Looking at my last four batches I have EE% from 65% to 80% due to some recipe factors and big changes in process as I tried different things. 

 

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