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Old 10-18-2007, 09:29 PM   #1
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Default Converting pre-boil OG to post-boil?

Hi all - did my second (and very satisfying) AG brew this week, doing EdWort's famous HausAle. As it'd been almost 4 months since my last brew (another AG where I forgot to take an OG reading), I measured the OG pre-boil and was understandably concerned when it came out 1.027, when I was expecting in the neighborhood of 1.045. I threw in a couple of pounds of extra-light DME for good measure and the primary is rockin' away as I type.

Having come to my senses in the meantime and realizing I should've measured post-boil OG (d'oh), is there a means to convert pre-boil to post-boil OG? Of course I threw things off by tossing in the DME, but I'm still curious if I came close to the target.

6.75 gal of 1.027 --> 4.5 gal of 1.???


P.S. Thanks for the recipe & writeup, EdWort - all those Cascade hops smelled fantastic! My neighbor across the street said he could smell the boil from behind his house


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Old 10-18-2007, 09:33 PM   #2
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6.75 gal of 1.027 --> 4.5 gal of 1.???

27 x 6.75 = 182.25

182.25 / 4.5 = 40.5

Gravity should be <> 1040.5
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Old 10-18-2007, 09:38 PM   #3
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Thanks Orfy - as soon as I posted this it occured to me that magic of the internet (aka google) might help. Next time I'll save the trouble. I hate being rusty on this stuff - need to find a new extra hours a week to devote to the practice of brewing
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