Cell Counting Error

for manual cell counting

(free LIFE SCIENCES resource collection)

ERROR max =

2 x

100

%

n

 

n = number of cells counted
Cell counting error depends on the number of cells counted under the microscope.
Reference : Javornicky (1958), Lund et al. (1958)

 

Cells Counted Error *
5 89%
10 63%
15 52%
20 45%
25 40%
30 37%
35 34%
40 32%
45 30%
50 28%
60 26%
70 24%
80 22%
100 20%
150 16%
200 14%
300 12%
500 9%

 

 

* Error is calculated with a 95% confidence interval