Summary
Compute mean plus population and sample standard deviation.
Calculation details
Enter comma-separated numbers. Calculations retain raw JavaScript number precision; display values are rounded to at most six decimal places.
Formula
Population uses N; sample uses N − 1.
Worked example
Standard Deviation Calculator example
Sample stdev is 2.
How it works
Enter a comma-separated numeric list. Mean, population SD (÷N), and sample SD (÷N−1) are returned together.
Frequently asked questions
How accurate is the Standard Deviation Calculator?
The calculation keeps raw numeric precision and rounds only the displayed result to at most six decimal places.
What should I do with an invalid result?
Check that every visible value is finite and that no required divisor is zero.