Cohen’s f² Effect Size Calculator for Multiple Regression

Cohen’s \( f^2 \) Effect Size Calculator

In multiple regression, Cohen’s \( f^2 \) is calculated as: $$ f^2=\frac{R^2}{1-R^2}. $$

* Enter the \( R^2 \) value from your regression model (must be between 0 and 1).

Step 1: Enter Regression \( R^2 \)

e.g., 0.30

Formula: $$ f^2=\frac{R^2}{1-R^2}. $$