Confidence intervals Calculator

Free confidence intervals calculator to calculate confidence interval. Instant results in your browser — no signup.

JavaScript is required for live calculation.

You can still read how Confidence intervals Calculator works, the formula, examples, and FAQs below.

Sample mean
Proportion
N
Variability
Confidence

Direct calculator

Inputs

Sample mean

Proportion

Variability

Confidence

Results update when you click Calculate.

confidence interval

200.0000

Calculate confidence interval

(sample_mean) * (proportion) / (n || 1)

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What this result means

Free confidence intervals calculator to calculate confidence interval. Instant results in your browser — no signup. Calculate confidence interval: (sample_mean) * (proportion) / (n || 1).

Assumptions

Rule dependency: Statistical formula.

How it works

Calculate confidence interval: (sample_mean) * (proportion) / (n || 1).

Example

Example: “confidence interval calculator”. Enter your values and click the button to get a result.

Frequently asked questions

What does this confidence interval calculator do?+

It helps you calculate confidence interval. Typical search: “confidence interval calculator”.

How should I read the result?+

Calculate confidence interval using sample mean/proportion; n; variability; confidence. Result: confidence interval.