VerifyKit
Sample-size calculator for design verification
Pick a method, enter your confidence and reliability, and get the sample size plus a rationale paragraph with citations to paste into your protocol.
- Zero-failure success-run and attribute plans with failures
- Exact normal tolerance-interval factors, one- and two-sided
- Distribution-free sample sizes
- Runs in your browser; a self-test page reruns every reference case
Open the calculator Run the self-test Reference-value check report
The calculator is checked against published reference tables. It has not been validated for your intended use; the self-test and check report support your own validation. VerifyKit statistics are an engineering aid, not regulatory advice. Regulatory decisions and submissions remain yours, and no one can guarantee FDA acceptance.