Statistics Calculator

Whether you're working through a statistics homework set, summarizing a lab data set, or just trying to make sense of a list of numbers, the same four values usually come up first: the mean (average), the median (middle value), the mode (most common value), and the standard deviation (how spread out the values are). Calculating all four by hand for anything more than a handful of numbers is tedious and easy to get wrong — this tool does it instantly from a pasted list.

Enter your numbers separated by commas, one per line, or with spaces — however you have them already. The mean and median are straightforward; the mode shows every value tied for most-frequent (or "No mode" if nothing repeats), rather than guessing at one. Standard deviation is calculated as the populationstandard deviation, dividing by the full count (n) rather than n − 1 — the right choice when you're treating your entered numbers as the complete data set, not a sample used to estimate a larger population.

This tool works with whatever numbers you give it — it doesn't know or assume anything about what they represent, so double-check that you've entered the right data set before trusting the result for anything graded.