Online Statistics Calculator: Mean, Sum, Standard Deviation, Min/Max
A descriptive statistics calculator for a dataset you build one value at a time or paste in bulk. It returns the count, sum, mean, population and sample standard deviation, minimum and maximum, with removable data points and a one-tap clear — all computed instantly and privately in your browser.
Statistics List Calculator Guide
Mean, standard deviation, sum and min/max from a list
The statistics calculator computes summary statistics from a list of numbers you build: count (N), sum, arithmetic mean, population and sample standard deviation, minimum and maximum. Add values one at a time; results update instantly and stay visible as the list grows.
01 Building the data set
Type a number into the input field and press Add (or the Enter key) to append it. Every value appears as a chip in the list; click the × on a chip to remove that single value, and press Clear to empty the list. The result tiles recalculate automatically after each change.
Use population standard deviation when your list is the entire population of interest; use sample standard deviation when the list is a sample drawn from a larger population (Bessel’s correction divides by N−1). With fewer than two values, sample standard deviation is not defined.
- N — the number of values entered
- Sum — total of all values
- Mean — arithmetic average (sum ÷ N)
- Pop σ — population standard deviation (divides by N)
- Sample s — sample standard deviation (divides by N−1)
- Min / Max — smallest and largest values
Data entry
- number fieldType a numeric value to add to the list.
- AddAppends the entered number to the data set. Enter key does the same.
- ClearRemoves all values and resets the statistics.
- × (on a chip)Removes just that one value from the list.
Result tiles
- NCount of values in the list.
- SumSum of all values.
- MeanArithmetic mean (average).
- Pop std devPopulation standard deviation (σ).
- Sample std devSample standard deviation (s).
- Min / MaxSmallest and largest values.
- Press Enter after typing each number to add values quickly without using the mouse.
- Remove an outlier by clicking its × and watch how the mean and deviation respond.
- All data stays in your browser; nothing is uploaded.
A free online descriptive-statistics calculator. Enter a list of numbers to instantly get the count (n), sum (Σx), arithmetic mean (x̄), population standard deviation (σ), sample standard deviation (s), minimum and maximum. Add or remove values one at a time — no data leaves your browser.
Entering data
Type a number and press Enter (or tap the add button) to append it to the list. Each value appears as a chip with an × button to remove just that value. The summary statistics recompute instantly. You can paste comma- or space-separated values into the input as well.
Population vs sample standard deviation
Population standard deviation (σ) divides by n and is used when your data is the entire population. Sample standard deviation (s) divides by n−1 (Bessel's correction) and is used when the data is a sample estimating a larger population. Both are shown so you can pick the right one.
When to use it
Quick homework averages, lab measurement summaries, survey response checks or any small dataset where you want a fast mean and spread without opening a spreadsheet. For very large datasets or advanced tests (regression, t-tests) use a dedicated statistics package.
FAQ
QWhat statistics are calculated?
Count (n), sum (Σx), arithmetic mean (x̄), population standard deviation (σ), sample standard deviation (s), minimum and maximum.
QWhat is the difference between σ and s?
σ divides by n for a whole population; s divides by n−1 (Bessel's correction) for a sample that estimates a larger population.
QCan I remove a single value?
Yes — tap the × on any value chip to remove it; all statistics recompute automatically.
QIs my data uploaded?
No. All calculations run locally in your browser and values are not sent to a server or saved to history.