Math
Standard Deviation Calculator
Mean, variance, and standard deviation (sample or population) of a dataset.
Inputs
Standard Deviation Calculator
Result
Standard deviation
13.4907
- Mean
- 18
- Variance
- 182
- Count
- 6
How spread out is your data?
Standard deviation measures average distance from the mean. Low SD means the data clusters tight; high SD means it's spread wide. Population SD divides by N; sample SD divides by N−1 (Bessel's correction) to correct bias when estimating a population from a sample.
Complete the summary
Pair with the Mean, Median, Mode Calculator for center measures alongside spread.
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