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Does anyone know, for when using the calculator, for extract brewing, at what time the calculator assumes you add the malt (liquid malt extract in my case)? I.e. does it assume late addition or full 60 min. boil? I am asking because I want to get to as close to the predicted IBU level of my beer as possible for my boil size. As I understand, AA extraction can be affected (reduced?) by the sugars in the wort.

Thanks.

  • Which calculator in particular do you mean? Can you link to it, perhaps? – jsled Jun 3 '15 at 12:39
  • Please see link – Phizzy Jun 3 '15 at 12:42
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In the fermentables section, if you "Add Custom" you can indicate that a fermentable (extract) addition is a "Late Addition", but it does not seem to specify exactly when/how late that addition is; I imagine it means "near flameout". As such, it looks like it will account for bitterness changes.

You should probably inquire with the Brewers Friend authors/operators, honestly.

| improve this answer | |
  • Thanks jsled. I literally just stumbled across this when I saw a drop down menu. If I check the late addition box it increases my IBUs 3 fold! (Up to 333 - lol.) This has confirmed for me that I will be adding all of my malt at the start of the boil :) – Phizzy Jun 3 '15 at 12:47

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