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Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > My efficiency
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Old 06-23-2013, 05:17 PM   #1
cgrivois
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Default My efficiency

Need help with calculating my efficientcy. Went from BIAB to a MLT for the first time with Cream of Three Crop. Not sure if I use my pre boil or post boil numbers. Also I understand there are different types of efficiecy calculations, not sure which one I want, just want to compair to what other people get when they say my efficiecie was ...

Pre boil I had 13 gal of wort at 1.043
Post boil I had 11 gal of wort at 1.047

12 lb Pale Malt (2 row) US
4 lb Flaked Corn, Maize
1 lb minuite rise
one hand full of rice hulls.

I mashed in with 7 gallons of water, had to add another gallon to get my temp up to 152. Got down to about 151.5 at about 80 minuits so I stopped the mash. Got roughly 5.5 gallons of wort from the first run. Added 7 gallons of 190 deg water to batch sparge, got that seven plus a little more back.

So what do you guys come up with for my efficiency if you dont mind running the numbers?
My gravity readings came from a refractormeter.

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Old 06-23-2013, 05:33 PM   #2
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Here's the one I use, and they explain different efficiencies as well. http://www.brewersfriend.com/brewhouse-efficiency/

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Old 06-23-2013, 05:42 PM   #3
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86% seems kind of high for my first time. There wasnt an option for regular rice so I used flaked rice in the calculator.

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Old 06-23-2013, 05:53 PM   #4
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12lbs x 37ppg = 444
4lbs x 39 = 156
1lb x 39 = 39
639 points total.

You have 47 points times 11 gallons for 517 points. 517 out of 639 is about 81%.

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Old 06-23-2013, 06:17 PM   #5
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Ok so I need to use the in the fermenter number, or post boil numbers. Thanks.

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Old 06-23-2013, 07:38 PM   #6
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Those numbers should not be different. You could have boiled over or lost some in hops and break material. I go with the fermenter volume. It's just easier to get more accurate volume numbers that way for me.

Once you have your boil volume and a gravity reading you can calculable your post boil gravity. It's just the gravity times the volume divided by the post boil volume.

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