Working out basic descriptive statistics by hand for even a modest list of numbers is tedious and error-prone, especially standard deviation, which requires several intermediate steps.
This tool parses any list of numbers separated by commas, spaces, or line breaks, and instantly calculates the mean (average), median (middle value), mode (most frequent value), range (max minus min), and standard deviation.
This covers the core descriptive statistics taught in most introductory statistics courses and used constantly in everyday data analysis, without needing a spreadsheet formula for a quick one-off calculation.
Because everything runs locally in your browser, results appear instantly and nothing you type or upload is ever sent to a server.
Bookmark this page if you expect to use this tool regularly — it loads fast and behaves the same way every time, with no account needed.
This kind of task shows up constantly in everyday writing, coding, design, and admin work, which is exactly why a dedicated, focused tool saves so much back-and-forth.
A tool that does one job well, without a cluttered interface or unrelated features competing for attention, tends to be faster to use than a heavier all-in-one app.
If you find yourself needing this often, keeping this page open in a tab is usually faster than digging through a bigger software suite's menus.
Frequently asked questions
What if there's no single mode?
If every value appears the same number of times, the data is considered to have no unique mode, which this tool indicates accordingly.
Is this sample or population standard deviation?
This calculates population standard deviation; sample standard deviation uses a slightly different formula (dividing by n-1 instead of n) for estimating a population from a sample.