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Statistics LibreTexts

7: Confidence Interval for a Population Proportion

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  • Confidence Interval for a Population Proportion

    This calculator creates confidence intervals for a population proportion given statistics. Please report the error to Dr. Jessica Kuang at

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



    Fill in the sample size (\(n\)), the number of successes (\(x\)), and the confidence level (CL), then hit Calculate.  Write the confidence level as a decimal.  For example, for a 95% confidence level, enter 0.95.

    Sample Size (\(n\)):   Number of Successes (\(X\)):   Confidence Level (enter a decimal):  



    Point Estimate (\(\hat{p}\)): Lower Bound: Upper Bound:


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