Standard deviation in statistics, typically denoted by σ, is a measure of variation or dispersion. Standard deviation is a statistical measure of diversity or variability in a data set. A low standard deviation indicates that data points are generally close to the mean or the average value. A high standard deviation indicates greater variability in data points, or higher dispersion from the mean. This standard deviation calculator uses your data set and shows the work required for the calculations. Enter a data set, separated by commas . Click Calculate to find standard deviation, variance, count of data points n, mean and more