Brew Software Calculating incorrect Gravity? - Home Brew Forums
Home Brew Forums > Home Brewing Beer > Brewing Software > Brew Software Calculating incorrect Gravity?

Reply
 
Thread Tools
Old 02-14-2013, 09:59 PM   #1
sk888smooth
Recipes 
 
Dec 2012
Elgin, IL
Posts: 97
Liked 5 Times on 5 Posts



Need a helping hand here. This is the recipe I am following:

http://www.homebrewtalk.com/f69/kern...a-dipa-343603/

Ingredients
Amt Name Type # %/IBU
10 lbs 6 oz Great Western 2 Row (2.0 SRM) Grain 1 82.0 %
9.2 oz Cara-Pils/Dextrine (2.0 SRM) Grain 2 4.6 %
9.2 oz Caramel/Crystal Malt - 10L (10.0 SRM) Grain 3 4.6 %
9.2 oz Munich Malt (9.0 SRM) Grain 4 4.6 %
4.4 oz White Wheat Malt (2.4 SRM) Grain 6 2.2 %
4.4 oz Honey Malt (25.0 SRM) Grain 5 2.2 %
1.00 oz Nugget [10.00 %] - Boil 60.0 min Hop 7 34.3 IBUs
0.60 oz Citra [10.50 %] - Boil 30.0 min Hop 8 16.6 IBUs
0.50 oz Citra [10.50 %] - Boil 15.0 min Hop 9 8.9 IBUs
0.50 oz Citra [10.50 %] - Boil 10.0 min Hop 10 6.5 IBUs
0.50 oz Citra [10.50 %] - Boil 5.0 min Hop 11 3.6 IBUs
1.15 oz Citra [12.00 %] - Dry Hop 12.0 Days Hop 13 0.0 IBUs
0.50 oz Amarillo Gold [8.50 %] - Dry Hop 12.0 Days Hop 14 0.0 IBUs
0.70 oz Citra [12.00 %] - Dry Hop 9.0 Days Hop 15 0.0 IBUs
0.90 oz Amarillo Gold [8.50 %] - Dry Hop 6.0 Days Hop 16 0.0 IBUs
1.10 oz Citra [12.00 %] - Dry Hop 3.0 Days Hop 17 0.0 IBUs
1.0 pkg California Ale (White Labs #WLP001) [35.49 ml] Yeast 12 -

Beer Profile
Est Original Gravity: 1.070 SG Measured Original Gravity: 1.070 SG
Est Final Gravity: 1.010 SG Measured Final Gravity: 1.010 SG
Estimated Alcohol by Vol: 7.8 % Actual Alcohol by Vol: 7.9 %
Bitterness: 69.9 IBUs Calories: 235.0 kcal/12oz
Est Color: 6.3 SRM


Here is the recipe in iBrewmaster (see image)

See the OG difference? Did I do something wrong here? I only subbed the 2-Row, but I don't believe that would make a difference.

Thanks in advance!


Click image for larger version

Name:	Screenshot_2013-02-14-09-25-32[1].jpg
Views:	85
Size:	48.6 KB
ID:	101187  
__________________
Primary: English ESB
Secondary:
Kegged: Barleywine, Wookey Jack Clone
Next on Deck: Gumball Head Clone

 
Reply With Quote
Old 02-14-2013, 10:02 PM   #2
jww9618
Recipes 
 
Jan 2011
Little Elm, Texas
Posts: 358
Liked 6 Times on 6 Posts


Your efficiency doesn't match the recipe's efficiency.



 
Reply With Quote
Old 02-14-2013, 10:08 PM   #3
sk888smooth
Recipes 
 
Dec 2012
Elgin, IL
Posts: 97
Liked 5 Times on 5 Posts


Hmmmm I upped it to 75% as per the recipe (I usually get higher). It brought me up to 1.064. It still doesn't add up.
__________________
Primary: English ESB
Secondary:
Kegged: Barleywine, Wookey Jack Clone
Next on Deck: Gumball Head Clone

 
Reply With Quote
Old 02-14-2013, 10:12 PM   #4
tre9er
Recipes 
 
Jan 2012
Lincoln, NE
Posts: 4,369
Liked 242 Times on 197 Posts


Efficiency. The recipe you have doesn't state it, but clearly it's higher than the 70% in ibrewmaster.
__________________
_________________________________
Skal!
Den Faaborg Bryggeri

Quote:
Originally Posted by davekippen View Post
Open log Fermenting and gas-can secondary?? I am planning my next brew right now!!

 
Reply With Quote
Old 02-14-2013, 10:13 PM   #5
tre9er
Recipes 
 
Jan 2012
Lincoln, NE
Posts: 4,369
Liked 242 Times on 197 Posts


Quote:
Originally Posted by sk888smooth View Post
Hmmmm I upped it to 75% as per the recipe (I usually get higher). It brought me up to 1.064. It still doesn't add up.
Keep upping it until you get the right OG, then you know that's the recipe's actual efficiency.
__________________
_________________________________
Skal!
Den Faaborg Bryggeri

Quote:
Originally Posted by davekippen View Post
Open log Fermenting and gas-can secondary?? I am planning my next brew right now!!

 
Reply With Quote
Old 02-14-2013, 10:14 PM   #6
tre9er
Recipes 
 
Jan 2012
Lincoln, NE
Posts: 4,369
Liked 242 Times on 197 Posts


Actually, your numbers in ibrewmaster don't add up. Those pound fractions aren't right according to...math. 9.2oz isn't .6lbs. it's .575. 4.4oz isn't .25, it's .275. Those little changes will probably make a difference. I realize each one is off by the same amount (one high, one low) but I wonder what happens if you put them in accurately. I'm not familiar with the software you use, so I don't know. I can try to plug into my spreadsheet if you keep having issues.
__________________
_________________________________
Skal!
Den Faaborg Bryggeri

Quote:
Originally Posted by davekippen View Post
Open log Fermenting and gas-can secondary?? I am planning my next brew right now!!

 
Reply With Quote
Old 02-15-2013, 03:53 PM   #7
ajf
Senior Member
HBT_LIFETIMESUPPORTER.png
 
ajf's Avatar
Recipes 
 
Oct 2005
Long Island
Posts: 4,646
Liked 105 Times on 99 Posts


I put the recipe into Promash and played with the efficiency.
At 70%, it gives 1.063 OG
At 75%, it gives 1.068 OG (The linked post states 75% efficiency)
At 77%, it gives 1.070 OG

-a.


__________________
There are only 10 types of people in this world. Those that understand binary, and those that don't.

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Calculating gravity pre-top off gannawdm General Beer Discussion 5 02-27-2012 05:40 PM
Calculating IBU via software Daver77 Beginners Beer Brewing Forum 3 03-13-2011 03:15 PM
Calculating IBU's. Is Brewing software accurate enough, or is my recipe off? Graeme Extract Brewing 14 09-19-2009 12:05 AM
Calculating Gravity BarrelOfBrew Winemaking Forum 4 02-05-2009 03:23 AM


Forum Jump