Confidence Interval Calculator

Calculate the Confidence Interval for Any Data Set

The Confidence Interval Calculator helps statisticians, researchers, and analysts determine the range within which a population parameter is expected to fall, based on sample data. Whether you're conducting experiments, analyzing survey results, or working with business metrics, this tool provides accurate confidence interval calculations.

🔹 How to Use This Tool?

1. Enter the Sample Mean (X̄) (e.g., 50).
2. Enter the Standard Deviation (σ or s) (e.g., 5).
3. Enter the Sample Size (n) (e.g., 100).
4. Select the Confidence Level (e.g., 90%, 95%, 99%).
5. Click Calculate to see:
   • Margin of Error (ME)
   • Lower and Upper Confidence Interval Boundaries​

🔹 Features

✔️ Instant confidence interval calculations
✔️ Supports different confidence levels (90%, 95%, 99%)
✔️ Useful for research, surveys, and statistical analysis
✔️ Easy-to-use and accurate results

Try it now and analyze your data with confidence! 🚀