Calculate the number of samples required to assure the absence of a pathogen or fault-causing organism at a selected probability To use add your values (numerical only) to the empty fields below.
Probability	Value is normally 0.95 (95%)
What mass (g) or volume (mL) of food should be free of the organism?	e.g. 500 g
Mass or volume of samples used	e.g. 25 g

Note this calculator is part of a tutorial/workshop on the: Reliability of microbial sampling in assuring food safety.

How to cite this article

Mullan, W.M.A. (2020) [On-line] Available from: Accessed:

Calculate the number of samples required to assure the absence of a pathogen or fault-causing organism at a selected probability