Gravity Calculations

Fri Nov 04, 2005 7:03 pm

FYI: I am an extract brewer who is going/researching AG. Here is my AG question...

If I know my OG after boil is to be 1.050 and my evaporation rate is for example 15%/hr, how do I calculate what my wort gravity should be before the boil? Am I over thinking this?!?

Another question please...

If I miss my target gravity after boil, can I merely add some DME to compensate?

Here is an example after boil:
Have 5 Gallons of wort with a gravity of 1.045
My target gravity is 1.060

What type of calculation/modification is needed to compensate with DME?

I guess, since the wort is already boiled, I would have to add in another gallon of water to the mix because I would have to boil the added DME correct?

I really think I'm over thinking this and perhaps bothering you guys with these types of questions. Hope not!

Thanks!

:?
User avatar
jonrober
 
Posts: 16
Joined: Wed Oct 26, 2005 11:32 am
Location: Denver

Fri Nov 04, 2005 7:10 pm

Almost forgot my original question.

What percentage of water does grain absorb? Have to calculate for that also :?:
User avatar
jonrober
 
Posts: 16
Joined: Wed Oct 26, 2005 11:32 am
Location: Denver

Sat Nov 05, 2005 5:38 am

There some pretty good recipe calculators here

www.tastybrew.com
HeathS
 
Posts: 12
Joined: Mon Oct 31, 2005 2:34 pm
Location: Upstate NY

Sat Nov 05, 2005 5:46 am

I'm with Heath. Get a copy of Promash or Beersmith. That or use an online calculator. The programs are only ~$20.

Travis
A very silly place... http://yarnzombie.net/Travis/

Without question, the greatest invention in the history of mankind is beer. Oh, I grant you that the wheel was also a fine invention, but the wheel does not go nearly as well with pizza.
-Dave Barry
User avatar
Lufah
 
Posts: 2075
Joined: Sat Jun 04, 2005 5:58 pm
Location: Mt. Vernon, OH

Sat Nov 05, 2005 1:47 pm

Thanks for the info. I will pick up a program!
User avatar
jonrober
 
Posts: 16
Joined: Wed Oct 26, 2005 11:32 am
Location: Denver

Sat Nov 05, 2005 2:50 pm

I am fond of Beer Smith

Just think, I used to do that by hand once :shock: :wink:

Dogger
"The immense importance of a pint of ale to a common person should never be overlooked" From the Canon of St Pauls Cathedral
User avatar
Dogger Dan
 
Posts: 166
Joined: Sun Oct 30, 2005 7:22 am
Location: Lucan, Ontario, Canada

Sun Nov 06, 2005 7:16 am

There are some calculations you can use if you want to do the math. Check out http://howtobrew.com if you want to know the math behind it. I have both Promash and Beersmith and I prefer just to be lazy and use one of them.
Peace!
pvignola
 
Posts: 145
Joined: Sat Jun 04, 2005 5:54 am
Location: Nashua, NH

Sun Nov 06, 2005 8:13 am

Ray Daniels' "Designing great beers" is one of my favorite books. He explains the math and process pretty well in chapter 6
Cheers,
Dr Scott
Cheers,
Dr Scott

Beer colder than your Mom, Whiskey older than your Dad...
User avatar
Dr Scott
 
Posts: 516
Joined: Sat Jul 09, 2005 12:12 am
Location: East Bay San Francisco

Next

Return to All Grain Brewing

Who is online

Users browsing this forum: No registered users

A BIT ABOUT US

The Brewing Network is a multimedia resource for brewers and beer lovers. Since 2005, we have been the leader in craft beer entertainment and information with live beer radio, podcasts, video, events and more.