Standard Deviation Calculator

Get the average and standard deviation for any set of numbers in seconds. Standard deviation tells you how much your data points vary from the average - tight clustering around the mean gives you a low number, while scattered data produces a higher one.

Just type your numbers with commas or spaces between them (like "1, 2, 3, 4, 5" or "10 20 30 40"). You'll see both the average and how spread out your data is, which helps you grasp what your numbers are really telling you.