📊Standard Deviation Calculator

Calculate standard deviation, variance, and other statistical measures.

Numbers (comma or newline separated)

About Standard Deviation Calculator

Calculate the population or sample standard deviation, variance, mean, and sum for any dataset. Enter a list of numbers and instantly get all core descriptive statistics. Useful for students, researchers, data analysts, and quality control professionals.

How to Use Standard Deviation Calculator

1
Enter your dataset
Type or paste your numbers separated by commas or spaces.
2
Choose population or sample
Select whether your data represents the whole population or a sample.
3
Calculate
Click Calculate to see standard deviation, variance, mean, and more.

Common Use Cases

Analyzing variability in test scores or survey results
Quality control calculations in manufacturing
Financial risk assessment and portfolio analysis
Statistical homework and research data analysis

Frequently Asked Questions

What is the difference between population and sample standard deviation?

Population standard deviation divides by N and is used when you have data for the entire group. Sample standard deviation divides by N-1 and is used when your data is a sample from a larger population.

How do I enter my data?

Enter numbers separated by commas, spaces, or line breaks. The tool accepts any standard list format.