What is Statistics Calculator?

The Statistics Calculator computes descriptive statistics from any dataset. Enter your numbers and get the mean, median, mode, standard deviation, variance, range, and more.

Paste numbers separated by commas, spaces, tabs, semicolons or newlines and the calculator returns count, sum, mean, median, mode, standard deviation (sample or population), variance, standard error of the mean, coefficient of variation, skewness, excess kurtosis, minimum, maximum, range, Q1, Q3, IQR, and a list of values that fall outside the 1.5 × IQR fences. A five-number box plot and a distribution histogram render alongside. Results stream as you type. Copy the summary as text or export every statistic as a two-column CSV for a report.

How to use

1. Enter your numbers separated by commas, spaces, or newlines in the input area.
2. View the full set of computed statistics — mean, median, mode, standard deviation, variance, standard error of the mean, coefficient of variation, skewness, excess kurtosis, min, max, range, Q1, Q3, IQR, and any IQR-fence outliers — alongside a box plot and a distribution histogram.
3. Copy individual results or export the full summary to use in reports or spreadsheets.

When to use

• Quickly reviewing class test scores to see the average and how spread out they are.
• Sanity-checking a column of numbers from a survey before importing into a report.
• Estimating standard deviation of stopwatch times without opening a full spreadsheet.

Result

A teacher enters 25 test scores (78, 85, 92, 67, 88, 91, 73, 82, 95, 76, 84, 89, 71, 93, 87, 80, 86, 74, 90, 83, 77, 81, 94, 69, 88) and instantly sees the class average is 82.5 with a standard deviation of 8.1.

FAQ

What's the difference between sample and population standard deviation?

Use the Sample / Population toggle at the top to choose. Sample (s) divides by n-1 and is the right pick when your numbers are a subset of a larger group (most real datasets). Population (σ) divides by n and is correct only when you genuinely hold every value in the group. The toggle also flips the variance formula and the standard-error-of-the-mean calculation, so all three move together.

What separators can I use between numbers?

Commas, spaces, tabs, semicolons and newlines all work, and you can mix them freely. Paste a column from Excel or a comma-separated row from a CSV and both parse the same way. Non-numeric tokens are dropped silently.

How does the calculator handle the mode when no value repeats or several tie?

If every value appears exactly once there is no mode, so the result reads "No mode" rather than picking an arbitrary number. When two or more values tie for the highest frequency the data is multimodal, and every joint mode is listed (for example 10, 20). A single most-common value is shown on its own.

Can I include negative numbers or decimals?

Yes. The parser accepts negatives like -3.14 and decimals in any locale-neutral form (use a period for the decimal mark). Scientific notation such as 1.2e-3 also works.

How big a dataset can I paste?

Tens of thousands of values run instantly. Past about 100,000 numbers the input area starts to feel sluggish, more from browser text rendering than from the maths. For very large datasets paste a sample or summarise in chunks.

Related Tools