Free Confidence Interval Calculator 2025 | Thiyagai.com

Confidence Interval Calculator

Calculate the confidence interval for your sample data with statistical precision

Sample Mean (x̄)

Standard Deviation (σ)

Confidence Interval Calculator 2025 - Statistical Analysis Tool | Thiyagi.com

Confidence Interval Calculator

Statistical analysis & interval estimation

Statistical Confidence Interval Calculator

Calculate confidence intervals for means, proportions, and differences

Calculation Type

Confidence Level

Distribution Type

Sample Size (n)

Sample Mean (x̄)

Sample Standard Deviation (s)

Population standard deviation is known (use σ instead of s)

Confidence Interval Results

Confidence Interval Visualization

Lower Bound 95% Confidence Upper Bound

Lower Bound

Minimum estimate

Point Estimate

Sample statistic

Upper Bound

Maximum estimate

Technical Details

Statistical Parameters

Margin of Error: -

Critical Value: -

Standard Error: -

Degrees of Freedom: -

Distribution Used: -

Confidence Interval Calculator

Confidence Interval Calculator

Statistical Confidence Interval Calculator

Second Sample Data

Confidence Interval Results

Confidence Interval Visualization

Lower Bound

Point Estimate

Upper Bound

Technical Details

Statistical Parameters

Formula Used

Interpretation

Assumptions & Recommendations

Statistical Assumptions

Recommendations

Share Your Results