⚡ Confidence Interval Calculator
Mean · Proportion (Wilson) · Difference of means — with visual CI
CI for Mean
CI for Proportion
CI for Difference of Means
Confidence level:
90%
95%
99%
Sample mean (x̄)
Sample std dev (s)
Sample size (n)
Number of successes
Sample size (n)
Group 1 mean
Group 2 mean
Group 1 std dev
Group 2 std dev
Group 1 n
Group 2 n
Calculate Confidence Interval
Point estimate
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Margin of error
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CI bounds
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Interpretation will appear here.
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