95% Confidence Interval Calculator
Free calculate 95% confidence intervals for population means and proportions. Get instant, accurate results with our easy-to-use calculator.
Confidence Interval Settings
95% Confidence Interval
Enter data to calculate confidence interval
About 95% Confidence Intervals
Interpretation
- • 95% confidence level
- • α = 0.05 significance level
- • Critical value: ±1.96
- • Most commonly used
When to Use
- • Standard statistical analysis
- • Research publications
- • Quality control
- • Hypothesis testing