New Giveaway - Wort Monster Conical Fermenter!

Home Brew Forums > Home Brewing Beer > Recipes/Ingredients > AAU's = ???




Reply
 
LinkBack Thread Tools Display Modes
Old 01-24-2009, 03:53 AM   #1
realestatecat
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2008
Posts: 56
Liked 1 Times on 1 Posts

Default AAU's = ???

I am looking at some recipes and when it says 3 AAU of [insert hop type], what does that exactly mean? What kind of scale is it?



__________________
On Deck: Hefeweizen, Kölsch, Porter
Primary:Empty
Secondary: Empty
Keg 1:ESB
Keg 2: Pop Top IPA
realestatecat is offline
 
Reply With Quote Quick reply to this message
Old 01-24-2009, 05:13 AM   #2
Blender
Feedback Score: 0 reviews
 
Blender's Avatar
Recipes 
 
Join Date: Jan 2006
Location: Santa Cruz, CA.
Posts: 3,116
Liked 5 Times on 4 Posts

Default

AAU stands for Alpha Acid Unit. It is determined by the alpha acid % of the hop and the weight of the addition. It is better explained by John Palmer here



__________________

Gary

Blender is offline
 
Reply With Quote Quick reply to this message
Old 01-24-2009, 05:41 AM   #3
Brewsmith
Feedback Score: 0 reviews
 
Brewsmith's Avatar
Recipes 
 
Join Date: Aug 2005
Location: Torrance, CA
Posts: 6,259
Liked 22 Times on 21 Posts

Default

AAU = Alpha Acid % (On hop Package) x Weight of hops (ounces)

A recipe calls for 10 AAU of Cascade

Your cascade says it's 5.0%, so to get 10 AAU, multiply the 5 by 2.

You need 2 ounces of cascade for that hop addition

if your hops were 4.0% you would need 2.5 ounces, if the AA% is 6.0 then you need 1.67 ounces.

__________________
Fermenting:#160 Apollo/Calypso Pale Ale
Kegged:#153 Old Helicon Barleywine 2013, #157 Irish Red, #158 Mosaic IPA, #159 Bravo/Delta ESB
Up Next:Brown Porter, American Stout, Imperial Stout
My Recipes
Tuba Sonata

Smith & Co. Custom Tap Handles
Brewsmith is offline
 
Reply With Quote Quick reply to this message
Old 01-24-2009, 12:36 PM   #4
homebrewer_99
Feedback Score: 0 reviews
 
homebrewer_99's Avatar
Recipes 
 
Join Date: Feb 2005
Location: Atkinson (near the Quad Cities), IL
Posts: 17,957
Liked 80 Times on 71 Posts
Likes Given: 1

Default

It's really simple math as Brewsmith already showed you.

If you have 3%AAU and the recipe calls for 4 use you calculator and press 4 divided by 3 equals 1.33 oz.

If you have 6.5%AAU and the recipe calls for 4 use you calculator and press 4 divided by 6.5 equals .61 oz.

See how simple it is?

__________________
HB Bill
homebrewer_99 is offline
 
Reply With Quote Quick reply to this message
Old 10-11-2013, 01:41 PM   #5
abbysdad2006
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2011
Location: Biddeford, Maine
Posts: 95
Liked 4 Times on 2 Posts
Likes Given: 2

Default

So, I'm making an Imperial IPA and it calls for 20-25 AAU's for bittering hops of like Columbus, Warrior or Summit. If I take the Summit AAu of 18.5% and take the high end of the AAU's of 25 for the recipe, I come up with about 0.75 oz of hops for that boil of 60 min. Does that sound right?

__________________

"Buy a man a six-pack, he drinks for a day. Teach him to brew, he drinks all his life"
"For life, Liberty, and the pursuit of Hoppiness"

abbysdad2006 is offline
 
Reply With Quote Quick reply to this message
Old 04-15-2014, 07:33 PM   #6
simchuck
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2012
Location: Warwick, NY
Posts: 4
Likes Given: 2

Default upside down

I know this is late to the game, but I think abbysdad2006 has it upside down.

AAU = % alpha acid x ounces

So for 25 AAU from 18.5% Summit, 25/18.5 = 1.35 oz



__________________
simchuck is offline
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options
Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
AAU's x2 Deanerator Beginners Beer Brewing Forum 2 06-10-2009 12:31 PM
How do I Caculate AAU's in my Hops t-bag Hops Growing 18 05-12-2009 04:38 PM
Calculating AAU's acdavis Hops Growing 2 12-21-2008 04:12 PM
What's the deal with AAU's? JeepGuy Recipes/Ingredients 9 05-02-2006 04:41 AM