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Free Online Standard Deviation Calculator

Calculate population or sample standard deviation.

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Result



How to use Standard Deviation Calculator
Calculate population or sample standard deviation. Population deviation divides by n. Sample deviation divides by n−1 and requires two values. A numerically stable running-mean algorithm is used.
  1. Set Numbers separated by commas or spaces.
  2. Set Definition.
  3. Run the tool, review the result and its stated limitations, then copy or download if needed.
Example & practical use
Calculate population or sample standard deviation. The example below demonstrates Numbers separated by commas or spaces; Definition.
Example input:
{
  "text": "2,4,4,4,5,5,7,9",
  "mode": "population"
}
Expected result (relevant fields):
{
  "result": 2
}
Features & result limitations
Population deviation divides by n. Sample deviation divides by n−1 and requires two values. A numerically stable running-mean algorithm is used.
Frequently asked questions
What inputs does Standard Deviation Calculator accept?
Numbers separated by commas or spaces; Definition
How should I interpret the Standard Deviation Calculator result?
Population deviation divides by n. Sample deviation divides by n−1 and requires two values. A numerically stable running-mean algorithm is used.
Where does Standard Deviation Calculator process my data?
Inputs are processed locally in your browser. Submitted text is not sent to external services. A successful-run event increments an aggregate tool counter without your input.