# 8: Sample Size to Estimate a Population Proportion

- Page ID
- 19751

Sample Size to Estimate a Population Proportion

This calculator computes the sample size needed to estimate a population proportion. Please report the error to Dr. Jessica Kuang at jkuangATvcccd.edu.

To learn how to use this calculator, please watch a short video here.

**Input**

Fill in the estimation for P (or choose no estimation for P), the error bound and the confidence level, then hit "Calculate " and the needed sample size will be calculated for you.

No Estimate for p Have Estimate for p |
Estimate for p (enter a decimal): | Error Bound (enter a decimal): | Confidence Level (enter a decimal): |

**Output**

Sample Size (n): |

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