Hops Alpha Acid

[SJW]

Is there a table or a list that indicates the Alpha Acid level in various hops? If not how do u work out the IBU for a brew?

 

[jgriffin]

If you go to this page, down the bottom it has a heap of hops and average alpha-acid levels. Each bag of hops i've bought has had it printed on it

http://realbeer.com/hops/FAQ.html

 

[Batz]

Yes the alpha acid should be on the hops you buy , to work out IBU's Grumpys has a good page

http://www.grumpys.com.au/HopWeight.php3

 

[Jovial_Monk]

Don't forget to allow for hop utilisation--this decreases as wort SG increases, quite dramatically once you get past OG 1080. The Russian Imperial Stout that is currently ageing in a cornie I reworked the hop additions allowing for a SG 1130 wort and ended up increasing the bittering addition from the 179g in the CAMRA book to 350g!

Haveing used fresh, REAL amber malt I now understand the description "Stunningly dry, bitter black chocolate on the tongue . . ."

Jovial Monk

 

[deebee]

If you use grumpys calculator, you should look at the table for utilisation efficiency in Palmer's book. Grumpys' default setting is for a low gravity boil and presumes quite high extraction - in the 20s% I think. Better to enter your own eg for 90 minute boil at 1.080 you will get about 17% extraction.

 

[SJW]

Sorry fellas, i should add that i am doing an extract + grains brew. So i guess all of the bitterness hops will come from the can, so i guess that any hops i boil after i have steeped will just be for taste not bitterness?

 

[Jovial_Monk]

The 15 min hops will add an IBU or three, way below taste threshold

Jovial Monk