How to use this statistics calculator
Paste any list of numbers above (from a spreadsheet column, a textbook exercise, a lab notebook), choose Sample or Population, and press Calculate. One click returns the complete descriptive toolkit: count, sum, mean, median, mode, minimum, maximum, range, quartiles, IQR, variance, standard deviation and standard error, with the sorted data so you can verify the order statistics yourself.
One dataset, the whole summary
Most statistics questions never need more than this page. "Describe the data" means location + spread + shape, and here they are together: mean and median for location, standard deviation and IQR for spread, and the comparison between the two pairs for shape. If the mean and median nearly agree, the data is roughly symmetric; if they are far apart, the tail is talking.
A batsman's nine innings: 45, 12, 78, 33, 45, 0, 56, 45, 21, summarise to: n = 9, mean ≈ 37.2, median 45, mode 45, range 78, SD ≈ 22.9. In one glance: a consistent 45-run player (median and mode agree) whose average is dragged down by failures (mean below median) and whose innings vary enormously (the SD). That is a scouting report in five numbers.
Where to go deeper
Each statistic in the summary has its own page on this site with fuller explanations, formulas and by-hand steps: the standard deviation page shows the complete deviation table for your data, the quartile page explains the interpolation method, and the z-score tools take your summary into the normal model. This page is the dashboard; those pages are the engine rooms.
Frequently asked questions
What does this statistics calculator compute?
Count, sum, mean, median, mode, min, max, range, midrange, quartiles, interquartile range, variance, standard deviation (sample or population) and standard error, all from one dataset.
Should I choose sample or population?
Population if your data is the entire group of interest; sample if it is a subset standing in for a larger group. The choice affects the variance and standard deviation (dividing by n − 1 instead of N).
Can I paste data from Excel or Google Sheets?
Yes. Copy a column or row and paste it directly: commas, spaces, tabs and line breaks are all accepted as separators.