Why doesnt this IBU calculation make sense?

[Elysium]

I am reading Designing Great Beers and decided to create my own recipes using just a spreadsheet.

I am actually stuck at the IBU calculation because even following the instructions in the book, I am facing difficulties.

Here is Ray Daniels' idea on how to calculate the IBU:
IBU=Woz*U% (decimal)*A%(decimal)*7.489/(Vgal*Cgrsvity)

This is simple...really, but when he gives an example of Cascade giving 3.3 IBU to the beer...well, I get 0.033

It simply doesnt make any sense.

He says:
Woz:0.5
A%:0.044
U%:0.12
Vgal:6
Cgravity:1

So, I use the given number and I get 0.033. How is that possible?

Has anyone read the book and faced the same problem?

 

[frazier]

Well, I'm not fit to wheel out my math right now, but - clearly, one of you is off by a factor of 100, and I'm guessing it's you
If I were in your position, I would plug my recipe into any one of the dozen or so online calculators, and get the answer that way.

Maybe you are supposed to enter '4.4' for the AA value. Not having the book, I can't say.

Cheers,

 

[Queequeg]

I just checked the book your correction factor is out.

Is not "7.489" it is listed as "7,489".

I guess this is a Spanish thing, like in France you use a , for a decimial?

Either way if you calculate it now you see it comes out at 3.29516