Calculate standard deviation. Our calculator computes the standard deviation for you.
The standard deviation (s) tells us the average deviation from the mean in our data set. Standard deviation is also the square root of variance.
How to Calculate Standard Deviation
Steps for calculating standard deviation:
1. Find the difference between each number (x) and the mean (\(\bar{x}\)).
2. Square (^2) each difference
3. Sum all the squared differences
4. Divide by the number of values minus 1
5. Take the square root
To use this calculator, separate each number with a space (example: 2 5 4 etc). For decimal numbers, you can use either a comma or a dot. Do not use thousands separators or letters.
Standard Deviation Formula
$$\sqrt{\frac{1}{n-1} \sum_{i=1}^N (x_i – \overline{x})^2}$$
Standard Deviation Calculator
Result: