Standard Deviation Calculator

Calculate mean, median, mode, standard deviation, variance, and more from a list of numbers.

Real-time results 100% free No sign-up Mobile friendly

Formulas verified against authoritative sources including the CFPB and Federal Reserve. Last reviewed May 16, 2026. Editorial policy.

Enter Your Data

Numbers (separate by commas, spaces, or new lines)

10 values entered

Count (n)

Sum

65.0000

Mean (Average)

6.5000

Median

6.5000

Mode

No mode

Range

12.0000

Min

1.0000

Max

13.0000

Std Dev (Population)

3.8794

Std Dev (Sample)

4.0893

Variance (Population)

15.0500

Variance (Sample)

16.7222

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