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 Home Brew Forums > BU:GU ratios?

05-06-2009, 03:57 AM   #1
pgenius
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 BU:GU ratios?

Can someone please explain to me BU:GU ratios. Do they help determine if your beer is balanced?

Cheers!

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05-06-2009, 04:23 AM   #2
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Yes. Ray Daniels came up with the ratio in his book Designing Great Beers, its the IBUs compared to the OG, and helps determine if a beer is balanced or not. Around .5 is pretty balanced, under .5 and it gets sweeter, over .5 and it gets more bitter. Different styles have different ranges that it should fall into.

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05-06-2009, 04:36 AM   #3
pgenius
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I'm horrible at math and this is probably easy, but how is it calculated.

ex: 60/50 BU:GU = 1.2

I don't understand where the 1.2 comes from.

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05-06-2009, 04:40 AM   #4
hammacks
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well it sounds like a beer with 60 IBUs and a starting gravity of 1.050.

The BU:GU ratio is 60/50 like you said, which equals 1.2. Getting past ESB maybe into IPA territory (well depending on the specifics of course)

Now if someone could post that beautiful chart BM likes to use...

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Last edited by hammacks; 05-06-2009 at 04:42 AM.

05-06-2009, 04:56 AM   #5
BarleyWater
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Anything over 1 is going to be extremely bitter tasting.

Here are some examples...

A brown ale which is relatively malty would have a BU:GU number of around .35-.45

Strong Scotch Ale - .27-.5

Pale Ale - .45-.75

IPA - .5-.9

IIPA - .65-1.2

It's just another way to check to see how sweet or bitter it will come out to be, and is very useful when scaling up or down recipes.

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05-06-2009, 05:03 AM   #6
hammacks
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Yeah BarleyWater is right.

Check out the chart here: http://www.homebrewtalk.com/f66/centennial-blonde-simple-4-all-grain-5-10-gall-42841/

Look how far to the right 60IBUs and a gravity of 1.050 would be.

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05-06-2009, 06:10 AM   #7
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I've used the BU:GU on all of my beers (I've always created my own recipes from the start, excepting the Mr. Beer batches). I aim for less than 0.50 for beers my wife will drink, and higher than 0.7 for beers that I'm planning to enjoy myself.

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05-08-2009, 03:36 AM   #8
pgenius
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Can someone just explain how their calculated?

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05-08-2009, 03:48 AM   #9
double_e5
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You did it in your own post, but I guessing you are missing something.

It is IBU divided by gravity points. So, a 60 IBU beer with a 1.050 gravity would be:

60 divided by 50. Which equals 1.2.

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12-26-2011, 01:29 AM   #10
Twofox
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Quote:
 Originally Posted by double_e5 You did it in your own post, but I guessing you are missing something. It is IBU divided by gravity points. So, a 60 IBU beer with a 1.050 gravity would be: 60 divided by 50. Which equals 1.2.
What he's missing is that (/ = divide by) so 60/50 is 60 dvided by 50.

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