enough yeast in my starter?

[MattGuk]

Hi all
made a 2ltr starter on friday night ready to brew this evening.
dO you think there looks to be enough yeast?
23ltr brew with an og of about 1.050-52.
thought would be appreciated

 

[Josiah2729]

Looks like more than enough to me.

 

[MattGuk]

So now I guess the worry would be overpitching?
This is only my third starter as I have usually used dry yeast, but im finding liquid gives more flavor profile for my brews

 

[WoodlandBrew]

Yeast from a starter is typically 2 million per ml. If you have another similar sized jug you could estimate volume.

You could also measure the number of cells by sugar consumed. Each gram of consumed sugar in a still starter produces about 1 billion cells.

More information here:
http://woodlandbrew.blogspot.com/2013/02/cell-growth-as-function-of.html

 

[MattGuk]

Hmmmmm
I may sound dumb here, ( im not the sharpest pencil in the pot ) but of ots as easy as 1 billion cells per 1 gram of fermentable, and also reading a half cup of dme weighs about 80 grams them im seriously under pitching, or am I missing something here?
Please excuse my ignorance.

 

[WoodlandBrew]

You've probably got it right. If you start with a vial or pack of 100 billion cells, and add that to 1 liter of water and 80g of DME with no stir plate you will grow about 80 billion cells resulting in a total of 180 billion. Not all of the sugar will ferment, but on the other hand, oxygen will allow more cells to grow. Experiments I have done with still starteres show that 1 billion cells per gram of extract added is reasonable.