How does the Confidence Interval Calculator work?

Calculate confidence interval from mean, standard deviation, and sample size. The tool calculates an estimate from the values entered.

Can I copy the result?

Yes. Use the Copy Result button to copy the current results.

Statistics

Calculate confidence interval from mean, standard deviation, and sample size.

Sample Mean

Standard Deviation

Sample Size

Confidence Level (%)

Primary Result -

Secondary Result -

Additional Result -

Formula

CI = mean +/- z * sd / sqrt(n)

► Necessary Cookies Always Active

Necessary cookies enable essential site features like secure log-ins and consent preference adjustments. They do not store personal data.

► Functional Cookies Remark

Functional cookies support features like content sharing on social media, collecting feedback, and enabling third-party tools.

► Analytical Cookies Remark

Analytical cookies track visitor interactions, providing insights on metrics like visitor count, bounce rate, and traffic sources.

► Advertisement Cookies Remark

Advertisement cookies deliver personalized ads based on your previous visits and analyze the effectiveness of ad campaigns.