# Hierarchical Multiple Regression Effect Size Calculator

Compute Cohen's f-square effect size for a hierarchical multiple regression study, given an R-square value for a set of predictor variables A, and an R-square value for the sum of A and another set of predictor variables B. The calculator computes the effect size attributable to the addition of set B, which can provide useful insights for analytics studies that rely on hierarchical regression.

Please provide the necessary values, and then click 'Calculate'.