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§ · free tool
Statistics calculator. The full picture from pasted numbers.
Paste a column of numbers and instantly get mean, median, mode, spread and quartiles, with a live histogram and box-plot. Everything is computed in your browser; nothing is uploaded.
A free online tool by Digital Heroes
0 values
Calculated locally, your numbers never leave the browser.
Summary
Enter at least one number to see the statistics.
Histogram
Box-plot
Population and sample, done right
Variance and standard deviation are shown for both the whole population (÷N) and a sample (÷N−1, Bessel's correction), so you pick the one that matches your data. Quartiles use linear interpolation, the box-plot whiskers follow the 1.5×IQR rule and flag outliers, and the histogram auto-bins with a sensible default, everything computed in your browser, free forever.
§ 02 · what you can do
Everything a stats summary should show.
- Compute descriptive statistics instantly: mean, median, mode, range, sum and count from any list of numbers.
- Get both population and sample standard deviation and variance, Bessel's correction included.
- Explore quartiles and IQR: Q1, Q2, Q3 and interquartile range using linear interpolation, the same method as Excel and NumPy defaults.
- Visualise your data with a live, auto-binned histogram you can adjust with a slider (3-30 bins).
- Spot outliers on a box-plot drawn with the 1.5×IQR whisker rule.
- Copy the full summary as plain text, or sort and clear your data with one click.
§ 03 · how to use it
Four steps, no manual.
- Open the calculator, it runs entirely in your browser, no signup.
- Paste or type your numbers into the input box. Any separator works: commas, spaces, tabs or newlines.
- Results appear instantly. Use the histogram bin slider to adjust the chart, or toggle Auto for a smart default.
- Click Copy results to export the full summary as plain text.
§ 04 · faq
Frequently asked questions.
Is the Statistics Calculator free?
Yes, completely free for everyone. No sign-up, no account and no usage limits.
Is it private? Is my data uploaded anywhere?
No upload, ever. The calculator runs entirely in your browser on your own device, your numbers never leave your computer and nothing is sent to a server.
Does it work offline?
Yes, once the page has loaded, every calculation and chart works without a connection, because all logic runs locally.
What is the difference between sample and population standard deviation?
Population figures divide by N and describe a complete dataset; sample figures divide by N−1 (Bessel's correction) and estimate a larger population from a subset. The calculator shows both, so you can pick the one that matches your data.
How are outliers detected on the box-plot?
Using the standard 1.5×IQR fence rule: any value below Q1 − 1.5×IQR or above Q3 + 1.5×IQR is flagged as an outlier and drawn as a separate amber dot beyond the whiskers.
Published · Last updated .
