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Standard Deviation Calculator

Calculate standard deviation and variance

14.14
Population SD (σ)
15.81
Sample SD (s)
200
Population Variance
250
Sample Variance
30
Mean
5
Count

How it works

  • Calculates both population and sample standard deviation
  • Shows variance, mean, and count
  • Population SD divides by N, Sample SD divides by N-1

Want to learn more?

Read the complete guide with examples and tips

Read guide