Power Analysis Calculator
Calculate required sample size or statistical power for your study.
Step 1: Select Statistical Test
Step 2: What Do You Want to Calculate?
Step 3: Enter Parameters
Results
Independent Samples T-Test
n per group = 64
Effect Size
0.500(Medium)
Alpha
0.05
Target Power
0.8
Tails
Two-tailed
Interpretation
To detect a medium effect (Cohen's d = 0.5) with 0% power at the 0.05 significance level, you need 64 participants per group (128 total).