Standard Deviation Calculator

Calculate population & sample standard deviation, variance, and mean instantly

Separate numbers with commas, spaces, or new lines
Count (n)
ā€”
number of values
Mean (xĢ„)
ā€”
average
Population SD (Ļƒ)
ā€”
divide by N
Sample SD (s)
ā€”
divide by nāˆ’1
Pop. Variance (ĻƒĀ²)
ā€”
squared SD
Sample Variance (sĀ²)
ā€”
squared SD
ā–¶ Show Calculation Steps
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