Sample Size Calculator

Calculate the minimum sample size for a survey or study.

How to Use This Calculator

  1. Enter your Confidence Level.
  2. Enter your Margin of Error (%).
  3. Enter your Population Size (0 = infinite).
  4. Enter your Expected Proportion.
  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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