Statistical Power Analysis Calculator

Input Parameters

Study Design

Two Proportions Two Means

Test Type

Two-sided One-sided

Significance Level (α)

Sample Size Per Group (n)

Proportion in Control Group (p₁)

Proportion in Treatment Group (p₂)

Statistical Power

Reference: Chow, S.C., Shao, J. & Wang, H. (2017). Sample Size Calculations in Clinical Research, 3rd ed.

Disclaimer: This tool is for educational and research planning purposes.