Math & science
Standard deviation
Calculate population or sample standard deviation.
Let’s run the numbers
USDEnter your values, then calculate.
◇ Calculated on your device. No account needed.
THE NUMBERS, MADE CLEARInstant calculation
＝
Your answer starts here
Check your inputs and select Calculate.
Calculated from your inputs; displayed results are rounded.
Formula & assumptions
σ = √(Σ(x−mean)²/N); sample: N−1
Calculated from your inputs; displayed results are rounded.