Standard deviation calculator
Find the standard deviation and variance of a set of numbers.
About this calculator
Paste your numbers and the calculator shows both the sample and population standard deviation. Standard deviation tells you how spread out the numbers are around the mean.
Use the sample figure when your numbers are only part of a bigger group, and the population figure when you have every value.
Common questions
Sample or population?
Use sample for a selection from a larger group, which is the common case. Use population when you have the whole group.
What does a high standard deviation mean?
That the numbers are spread far from the average.
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