This standard deviation calculator makes it easy to measure how spread out your data are. Just enter your numbers in the text box, separated by commas or spaces. Then choose whether you want to calculate the sample standard deviation or the population standard deviation.
The calculator will show you the standard deviation, variance, mean, count, and the sum of squares, along with a step-by-step solution and a histogram of your data. Use this tool to quickly understand the variability in your dataset. Below the calculator is additional information about using it. See all my Statistical Calculators!