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Est OG vs Est Pre Boil Gravity

telemarkus

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Hi All;

I am confused by the two calculated measures in Beersmith based on data I am entering.

Est. OG vs Est. Pre Boil Gravity

My Est. OG I always slightly higher than my Est. Pre Boil Gravity. Why? are these not the same thing? Gravity measured after the sparge and before the boil?

Thanks,

markus.
 
Greetings - your OG (original gravity) is measured after the boil. Your pre-boil is as it says, before the boil.  When the wort boils it looses water essentially condensing the extract. I typically measure the OG just before I pitch the yeast.

Hope this helps!!
 
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