Two proportions, equal n.
Last Updated: 05 Feb 2026
Per group n ≈ 250 (normal approx., equal allocation)
Clinical Trial Sample Size (Two Proportions) helps you two proportions, equal n. It is commonly used by domain specialists, operations teams, learners for sample size, clinical trial, power.
Clinical Trial Sample Size (Two Proportions)
Two proportions, equal n.
- Runs entirely in your browser.
- For planning and education; verify critical decisions with qualified professionals.
Disclaimer: This tool is for education only and is not medical advice. Always follow licensed clinical protocols.