Fisher's Exact Test Calculator
Calculate exact p-values for 2x2 contingency tables
Enter the counts for a 2x2 contingency table.
Outcome 1
Outcome 2
Group 1
Group 2
About Fisher's Exact Test
Fisher's exact test is used for small sample sizes in 2x2 contingency tables.
Unlike chi-square, it calculates exact p-values using the hypergeometric distribution.
It's preferred when expected cell counts are less than 5.