Confidence Interval Calculator for a Single Proportion

  • Provides live interpretations.
  • Supports multiple CI methods (Wald, Wilson Score, Clopper-Pearson).
  • Visualizes and tabulates CI width across varying sample sizes and proportions.

Input Values

Specify input values and click Calculate. Hover over for help.

  0.95

Influence of Changing Input values on Confidence Interval Width

Customize Visualisation

Customize the plot by changing input values from here.

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To Max
By
From Min
To Max
By

Visualisation

This visualisation shows how CI width changes with sample size for a given proportion and confidence level. You may change the default values from the panel on the left.

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