cfu/pfu calculation worksheet

While doing an experiment recently, I found that I was doing a lot of guesswork to figure out how much I should dilute resuspended colonies to get nicely spaced single colonies for viable counts. Since I was doing the simple calculations a lot, I decided to put together a worksheet to do it for me.

I also added a panel that does the calculation the other direction –from # of colonies on a plate back to the original # of cells in the original culture.

Trivial? Yes.

Useful? Hopefully.

Accurate? Probably.

cfu_worksheet_ss

cfu_worksheet

-- Doug

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