🔒 Please log in to use tool features (fill sample / analyze / AI interpretation / export document)
🔢 Sample Size & Power Analysis
Means · Proportions · ANOVA · Correlation · Poisson rates · Crossover · Equivalence · Variance tests
Calculate the minimum required sample size before running an experiment or survey, to avoid unreliable conclusions from too few samples or waste from too many. Covers power analysis for 13 common tests.
Test Type
Basic Parameters
Results
Required n per group
-
Total sample size
-
Actual power
-
Effect size
-
About Sample Size Calculator
Sample size calculator: find minimum samples for estimating means and proportions or for hypothesis tests with confidence level, error and power settings.
Learn more about this tool → ← Back to all quality toolsAI Report
Generate a beautiful HTML chart report. Download as Word or print to PDF.
AI Report Preview