Statistics calculator: mean, median, standard deviation
Compute mean, median, mode, standard deviation, variance and quartiles of a set of numbers.
Count (n)
10
Sum
104
Mean
10.4
Median
10.5
Mode
12
Min
3
Max
20
Range
17
Variance (population)
21.44
Variance (sample)
23.822222
Std dev (population)
4.630335
Std dev (sample)
4.880801
Q1 (25%)
7.25
Q3 (75%)
12
IQR
4.75
🔒 100% client-side — no data sent
Paste a set of numbers and instantly get the main statistics: count, sum, mean, median, mode, minimum, maximum, range, variance, standard deviation (population and sample) and quartiles. Everything is computed locally in your browser.
What is it for?
- ▸ Quickly analyze a dataset
- ▸ Compute a standard deviation without a spreadsheet
- ▸ Find the quartiles and median of a series
- ▸ Check a mean and a mode
FAQ
Which separators are accepted?
Spaces, commas, semicolons and line breaks. Non-numeric values are ignored.
What is the difference between population and sample standard deviation?
Population divides by n, sample by n−1 (Bessel's correction), used when the data is only a sample of a larger set.
How are quartiles computed?
By linear interpolation (inclusive method, like Excel's PERCENTILE.INC).
Is my data sent anywhere?
No, all calculations run in your browser; nothing is transmitted.
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