Statistics Calculator
Paste numbers to get mean, median, mode, range, variance, standard deviation, and quartiles instantly in your browser.
Variance and standard deviation use the sample formula (dividing by n−1). Quartiles use linear interpolation, the same method as spreadsheet PERCENTILE.INC. All computed in your browser.
Drop in a list of numbers and get a full statistical summary at once: mean, median, mode, minimum, maximum, range, variance, standard deviation, and quartiles. It is ideal for quick homework checks, lab data, and spreadsheet sanity checks — all computed in your browser.
How to use it
No account, no upload — it all happens on your device.
What each measure tells you
Centre, spread, and shape in one glance.
- Centre. Mean, median, and mode each summarise a typical value from a different angle.
- Spread. Range, variance, standard deviation, and IQR describe how tightly or loosely the numbers cluster.
- Position. Q1 and Q3 mark the 25th and 75th percentiles, splitting the data into quarters.
Reading the standard deviation
Standard deviation is the typical distance of a value from the mean, in the same units as your data. A small value means the numbers hug the average; a large one means they are spread out. Variance is simply the standard deviation squared.