About Statistics Calculator
Descriptive statistics summarize the centre and spread of a dataset.
Find mean, median, mode, range and standard deviation. Use this page alongside your notes to check the process, then change the inputs to explore a different example.
How to use Statistics Calculator
- Review the input labels and replace the sample values with your own details.
- Check the units, options and any grading rules. The method below explains this tool’s assumptions.
- Use the action button to generate your result. Review it before copying, downloading or printing.
Method and assumptions
The mean is the sum divided by count. The median is the middle sorted value (or mean of the two middle values). Modes are the most frequent values; if every value appears once, there is no mode. Population variance divides squared deviations by n; sample variance divides by n − 1 and needs at least two values. Standard deviation is the square root of variance.
Worked example
For 2, 4, 4: mean is 10/3, median 4, mode 4 and range 2.
Enter this example above, then change one input and compare the result. This helps you see which part of the method responds to the change.
Understanding your result
Read the main answer first, then review any supporting values, units or messages. An input warning means you should correct the relevant field and run the tool again.
For a useful comparison, change one input at a time and record both results. Avoid rounding intermediate values when checking calculations by hand.
Tips and common mistakes
- Select Sample when estimating variability from a sample; its denominator is n−1.
- Recheck the example and input format if a result is unexpected.
- Keep a downloaded copy of work you want to reuse. Reloading the page resets your session.
Frequently asked questions
Can the dataset have multiple modes?
Yes. Every equally most-frequent value is shown; unique values give no mode.
Do I need an account?
No. Use the tool directly in your browser. Inputs are kept in the current page session, so download useful work before leaving.
Can I save or print my result?
Use Copy result, Download text or Print at the bottom of Your Result. Flashcards and quizzes export their source content for reuse; citations export your edited text.