Coldbreak Brewing HERMS Giveaway!

HomeBrewSupply AMCYL Brew Kettle Giveaway!


Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > calculating efficiency
Reply
 
Thread Tools
Old 08-14-2012, 05:53 PM   #1
ninkasi2012
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2012
Location: toronto, ontario
Posts: 51
Likes Given: 2

Default calculating efficiency

Just wondering when you calculate efficiency do you use your pre-boil volume or final boil volume?
my pre-boil volume is 5.75G but after I boil I'm aiming for 5. So not sure when I divide by 5.75 or 5?! I normally take a reading soon after mashing.

thanks in advance for everyone's help!


ninkasi2012 is offline
 
Reply With Quote
Old 08-14-2012, 06:10 PM   #2
TopherM
BJCP ID: F0838
HBT_SUPPORTER.png
Feedback Score: 1 reviews
 
TopherM's Avatar
Recipes 
 
Join Date: Mar 2011
Location: St. Petersburg, FL
Posts: 3,954
Liked 437 Times on 346 Posts
Likes Given: 23

Default

http://www.howtobrew.com/section2/chapter12-5.html/

I personally just pop my numbers into BeerSmith and it calculates everything for me.
__________________
Primary #1 - Midnight Ryeder (Midnight Wheat and Rye)
Primary #2 - Florida Weiss
Primary #3 - Kane-DOH APA (Honey Citra APA)
Secondary #1 - Downtown Flanders Brown (brewed August 2012)
Keg #1 - Raspberry Florida Weiss
Keg #2 - Cinnamon Raisin Cider
Keg #3 - NONE!
Bottled - NONE!
TopherM is online now
 
Reply With Quote
Old 08-14-2012, 06:15 PM   #3
bdh
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2012
Location: Baltimore, MD
Posts: 169
Liked 18 Times on 9 Posts

Default

You can do either - just use the volume that's there when you take the gravity reading. As a simple example, say you have:

10 lbs 37ppg grain
1 lb 34ppg grain

You can use the equation:

gravity = efficiency * (10*37 + 1*34)/volume

Where gravity here is the last two digits of the gravity reading (i.e. 1.0xx).

So say you get 75% efficiency, then if you measure the gravity pre-boil (with a volume of 5.75gal) you should get a gravity of 0.75*(404)/5.75 = 53

If you measure gravity post-boil (with a volume of 5gal) you should get 61 (1.061 on the hydrometer).
bdh is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mash Efficiency vs Brewhouse Efficiency exe Beginners Beer Brewing Forum 22 12-22-2011 07:09 PM
Mash efficiency vs Post boil efficiency RootDownBrewing Beginners Beer Brewing Forum 1 08-21-2011 12:33 PM
Calculating My Efficiency daveooph131 Beginners Beer Brewing Forum 2 01-15-2010 01:11 AM
Calculating efficiency, beersmith or by hand? dmbnpj Beginners Beer Brewing Forum 11 09-28-2009 01:58 AM
Calculating Yeast Efficiency taydawg197 Beginners Beer Brewing Forum 3 08-13-2007 03:50 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS