How much Yeast do I have?

[Dan Pratt]

I kept the yeast cake from my porter last night and will be washing it for the next batch of IIPA.

Wondering how I know how much yeast that is? It was a 270million starter that fermented into a 21lt batch of 1.050 wort.

 

[SBOB]

I would say check either
Mr Malty - http://www.mrmalty.com/calc/repitch.html
or
Brewersfriend - http://www.brewersfriend.com/yeast-pitch-rate-and-starter-calculator/

and use their calculators

 

[MartinOC]

I agree with SBOB.

You're probably best-off doing the washing first before using the calculators, 'cos you're undoubtedly going to have some other (non-yeast) bits in there as well.

 

[slcmorro]

Enough for your next IIPA, no doubt.

 

[CmdrRyekr]

Check with your doctor. They have some tests for this these days.

 

[Yob]

You should be able to easily collect 100ml compacted yeast from that...

if it's only a week or so old, Mr Malty will say you need in the order of 60ml-80ml 'compacted' slurry for a standard sort of batch up to about 1.060 above that and youll need about 100ml and if I get to this point I'll usually take the 100ml (rinsed yeast) save half in cryo and make a starter from the other 50ml so Im pitching 'fresh' yeast that has good vitality.

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