Standard Deviation Calculator

Calculate standard deviation, variance, and visualize your data distribution

Enter your data (comma or space separated):

Example formats: 5, 10, 15, 20 or 5 10 15 20

Calculation Results

Data Points (n)

Mean (μ)

0.00

Sum of Squares

0.00

Variance (σ²)

0.00

Standard Deviation (σ)

0.00

1. Calculate the mean (average) of the data set

2. Subtract the mean from each data point and square the result

3. Sum all the squared values (sum of squares)

4. Divide the sum by the number of data points to get variance

5. Take the square root of the variance to get standard deviation

Data Points

Mean Value

±1 Standard Deviation