Standard Deviation Calculator

The calculator below is extremely easy to use. Simply enter a set of numbers and click on the calculate button. Please make sure you separate each number with a comma else it will not work. You will also get the result for mean, variance and population variance. Moreover the calculator will output all the steps of the calculation which is very useful for students!

Enter Your Numbers :

Calculate

Solution :

How Our Standard Deviation Calculator Works

Below are the formula used by our calculator to perform the various operations

Mean

First of all you must calculate the mean of your numbers.

Variance

Take each number and subtract the mean from it. Then simply square the result.

Population Standard Deviation

Once you have the square numbers, find their mean.

Population Variance

Find the square root of the above result. So simple!!

For more information check out:
http://en.wikipedia.org/wiki/Standard_deviation