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Calculators » Math » Standard deviation

Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can calculate standard deviation, mean, and variance of a set of numbers.

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Standard deviation is the square root of the Variance.

Steps to calculate the variance:

- Work out the Mean (the simple average of the numbers)
- Then for each number: subtract the Mean and square the result.
- Then work out the average of those squared differences.

**Standard deviation formula:**

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