Pre-boil OG vs. Post-Boil OG

HomeBrewTalk.com - Beer, Wine, Mead, & Cider Brewing Discussion Community.

Help Support Homebrew Talk:

bh10

Well-Known Member
Joined
Nov 12, 2009
Messages
695
Reaction score
14
Location
In the brewery
I was searching for some things and ran across that there's a difference of the two, which might be dumb, but I had no clue. So my question is the OG higher or lower pre-boil?
 

Naked_Eskimo

Well-Known Member
Joined
Jul 16, 2010
Messages
346
Reaction score
1
Location
USA
Pre-boil will be lower OG. During the boil, you'll lose a lot of water to evaporation, leading to a more concentrated wort -- hence a higher OG post-boil.
 

TCHDNSD

Well-Known Member
Joined
Jan 15, 2007
Messages
184
Reaction score
10
Location
Nampa, ID
Pre-boil should be a lower gravity than post-boil.
As the water boils off, the density of sugars increases raising the gravity.
 
Top