Standard Deviation Calculator

Calculate the mean, median, standard deviation, and variance for a set of numbers. Supports both population and sample calculations.

Value 1

Value 2

Value 3

Value 4

Value 5

Tab to move between fields

Std Deviation (Population)

8.45

Std Deviation (Sample)8.9

Mean (Average)7.8

Median5

Variance (Population)71.36

Variance (Sample)79.29

Count10

Sum78

Range23

How to Use This Calculator

Enter up to ten data values in the numbered fields; values set to 0 are treated as actual data points, so only fill in the fields you need.
Mean (average) is the sum of all values divided by the count of values.
Variance measures the average squared distance from the mean; Standard Deviation is its square root.
The calculator reports both population standard deviation (σ, divides by n) and sample standard deviation (s, divides by n−1).
Use sample standard deviation when your data is a sample from a larger population; use population when you have all the data.
Range (max − min) and median are also provided for a complete descriptive summary.

Ad Placeholder

Related Calculators

Calculate percentages easily — find a percentage of a number, percentage increase/decrease, and percentage change between two values.

Add, subtract, multiply, or divide fractions. Get simplified results, mixed numbers, and decimal equivalents.

Calculate your semester GPA and cumulative GPA. Enter course grades and credit hours for an instant result.

Ad Placeholder