📊 Sample Size Calculator
Calculate the required sample size for your survey or research study with statistical precision. Determine optimal sample sizes based on confidence level, margin of error, and population parameters.
Input Parameters
How confident you want to be in your results
Acceptable range of error (1% - 50%)
Total number of people in your target group
Expected percentage with the characteristic (use 50% if unknown)
Override automatic Z-score calculation
Results
Required Sample Size
participants needed
Parameters Used:
- Z-Score: 1.96
- Confidence Level: 95%
- Margin of Error: 5%
- Expected Proportion: 50%
- Population Size: 1,000,000
- Population Type: Finite
Formula Used:
Where: n = sample size, Z = Z-score, p = proportion, E = margin of error
Frequently Asked Questions
⚠️ Disclaimer
This calculator is for educational and reference purposes only. Results should not replace professional statistical consultation. Users should verify the appropriateness of calculated sample sizes based on their specific research requirements and statistical principles.