Standard Deviation Calculator
Measure how spread out a set of numbers is from the average. Standard deviation is widely used in statistics, research, finance, and data analysis.
Enter numbers separated by commas.
Formula
sqrt(sum((x - mean)^2) / n)
Frequently Asked Questions
What is standard deviation?
Standard deviation measures how much the numbers in a dataset vary from the average value.
What does a higher standard deviation mean?
A higher standard deviation means the values are more spread out from the mean.
Why is standard deviation useful?
It helps you understand variability in data, which is useful in statistical analysis, forecasting, and performance measurement.