UltimateTools

šŸ“‰ Standard Deviation Calculator

Calculate population and sample standard deviation, variance, and mean from any dataset.

šŸ“‰

Standard Deviation Calculator

Math

Inputs

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How to Use This Calculator

  1. 1

    Enter numbers separated by commas.

  2. 2

    Click Calculate to see SD, variance, and mean.

How It Works

SD measures spread from the mean. Population SD (Ļƒ) divides by n; sample SD (s) divides by nāˆ’1 (Bessel's correction). Use sample SD for subsets of a larger population.

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Dedicated URL:standard-deviation.ultimatetools.online

Frequently Asked Questions

Use population SD when you have all data. Use sample SD when your data is a subset of a larger population.

Why Use This Tool

  • Instant, accurate results
  • No registration required
  • 100% free forever
  • Works on all devices
  • Privacy ā€” no data stored