About StatWisely Sample Size Calculator
A focused research-planning companion built on StatWisely's reusable calculation engine.
One validated engine
The web and desktop applications use the same Python calculation package for consistent results.
English and Arabic
The complete calculation workflow and statistical guidance are available in both languages.
Designed for research planning
Explore assumptions, calculate required samples, and review sensitivity curves before data collection.
Important planning notice
Results are planning estimates. Confirm critical assumptions and final study-design decisions with a qualified statistician.