How many degrees of freedom does a 3 times 3 table have?

A 3x3 table, or a contingency table with 3 rows and 3 columns, has degrees of freedom calculated as (number of rows - 1) × (number of columns - 1). Therefore, the degrees of freedom for a 3x3 table is (3 - 1) × (3 - 1) = 2 × 2 = 4.