White labs quantity per vial

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Starter size is typically determined based off of the assumption of a specific cell-count contained within the vial, not the other way around.

That said, depending on how new the vial is, you can typically expect around 70-100 billion cells.
 
What size starter does 1 vial of white labs represent?

your question makes no sense - you can make any starter size, but end cell count will depend on starter size, pitched cell count, stirring method, etc.

http://www.yeastcalculator.com

White Labs vials start at 100 billion cells when fresh, but that number decays as yeast gets older, with time constant of a few months.
 
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