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Old 12-10-2008, 10:49 PM   #1
histo320
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Default My calculations are off?????

I've spent plenty of time on Beer WIKI (awesome link), and looking at the different yeasts, malts, hops, etc. I know I can buy software and use websites to get the exact answers but I am one of those who wants to know the process.

I noticed that there are several types of hops that are not present on the chart I found after browsing. Where if anywhere could I find some of the characteristics such as Mt. Hood, Bullion, and Saaz?

Next, I found a Beer Math link, and took the formula to calculate IBU's and after conferring with Beerrecipator, I was way off. I am using,
((Alpha Acit AA% x Quantity in oz) x % util) / 7.25. Is this the correct formula, I know it probably isn't exact, I just would like a ballpark range.

Finally, finding starting gravity and estimating final gravity. In the book that came with my kit it says for sg to
(Lbs of extract x degrees of pounds) / gallons.

there is a table that has DME 1.040, LME 1.034, Steeped malts 1.016.

I know the malts are not correct because different ones have different gravities

Also, how do you find the FG?

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Old 12-10-2008, 11:33 PM   #2
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For hops:

Hop Reference Chart

For calculating IBUs

How to Brew - By John Palmer - Hop Bittering Calculations

I recommend reading How to Brew by John Palmer if you haven't already.

howtobrew.com

Calculating estimated gravity for extract is:

(gravity points for extract per gallon) x (lbs of extract used) / (estimated final volume of wort)

(this website gives potential gravity for grains and extract The Beer Recipator 2.2)

Final gravity is best measured with a tool. I use the hydrometer. You can also use a refractometer.

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Old 12-11-2008, 12:14 AM   #3
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I have not read the book and defintely will now.

THanks for the help!

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Old 12-11-2008, 12:17 AM   #4
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"The Complete Joy of Homebrewing" by Charles Papazian is another great book if you haven't read that one yet.

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Old 12-11-2008, 12:18 AM   #5
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No problemo. It looks like you are trying to look at free resources so I figured the how to brew would work great. It's what I started with. There are later editions with updated info if you choose to buy them.

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Cry 'Havoc,' and let slip the dogs of war;
That this foul deed shall smell above the earth
With carrion men, groaning for burial.

Prim 1: Ogre's Inverted Extra Red Ale
Prim 2: Ogre's Hair of the Dog Imperial Amber Ale
Prim 3: Ogre's Relaxed APA
Sec 1: Honey Blonde Ale with Hefe Yeast
Sec 2: Scotch Wee Heavy
Sec 3: Ogre's Simple Mead
Keg 1: Ogre's Brown Ale
Keg 2: Ogre's Extra Red Ale
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