Confidence Interval Calculator

Calculate confidence intervals for a population mean.

How to Use This Calculator

  1. Enter your Sample Mean (x̄).
  2. Enter your Standard Deviation (σ).
  3. Enter your Sample Size (n).
  4. Enter your Confidence Level.
  5. Click Calculate to see instant results with a step-by-step breakdown.
  6. Use the Share button to copy a link with your inputs pre-filled.

⚠️ Results are for informational purposes only. Always verify important calculations with a qualified professional.

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