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Old 01-06-2011, 04:08 AM   #1
Sep 2010
Kelowna, B.C.
Posts: 277
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How do you figure out the amount of yeast to pitch from yeast that you have harvested.

I know how to use the calculator at Mr Malty but what exactly do I enter and change? How do I know what to set the slider bars to?


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Old 01-06-2011, 02:27 PM   #2
If it's worth doing, it's worth overdoing
Jan 2008
Ridley Park, PA
Posts: 1,153
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The default on the sliders is non-rinsed slurry that has settled for a few days.
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Old 01-06-2011, 02:47 PM   #3
Malticulous's Avatar
Aug 2008
St. George Utah
Posts: 4,146
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I just pitch 1/2 cup fresh slurry for normal ales. It works as well as a pack of dry yeast.
Everything is better with a beer.

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Old 01-06-2011, 08:33 PM   #4
Aug 2010
Dover, New Hampshire
Posts: 62

There is a little info on that here:

It would be nice if the calculator included a box to enter the number of days the yeast has settled in the fridge which could be used by the program to estimate a default thickness.

I had it in the fridge for a month. Is it "4.5" at that point? I don't know.. so I split the difference. I ended up making a 1.5L starter with it and it was so active and produced so much yeast I decided by the seat of my pants I had enough and put it in the fridge for a few days. On brew day I decanted and added another 1L to get it going and pitched that when it was nice an active. How much was in there? Beats me.. wish I knew for sure.. but its been going pretty good though.

Seacoast New Hampshire
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Old 01-06-2011, 09:43 PM   #5
Sep 2010
North of Nowhere
Posts: 48

I too would like some insight on what to enter in the MrMalty Calculator for washed yeast. I brewed a 12 gallon batch of CDA with an OG of 1.061. I made a 4 quart starter with 85ml of 2 1/2 week old washed 1450 on my stir plate based on MrMalty's default settings for slurry. Now I am worried that I over pitched. What do you guys think?

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