Standard Deviation Calculator

Enter numbers to find standard deviation, variance and mean.

Numbers (comma or space separated)

Sample Standard Deviation

Population std. deviation	0
Variance (sample)	0
Mean	0
Count	0

Sample vs population

Standard deviation measures how spread out numbers are around the mean. The population version divides by N; the sample version divides by N − 1 (Bessel's correction) and is used when your data is a sample of a larger group.