Calculate Standard Deviation
Calculate standard deviation and other statistics for your data set. Our free calculator handles both population and sample calculations, showing variance, mean, range, and more. Essential for statistics students and data analysis.
How to Use This Calculator
- Enter numbers separated by commas, spaces, or new lines
- Select population or sample
- View all statistical measures
Features
- Population standard deviation (σ)
- Sample standard deviation (s)
- Variance calculation
- Mean, min, max, range
- Handles large data sets
Frequently Asked Questions
Population vs sample standard deviation?
Use population when you have data for the entire group. Use sample when your data is a subset, which uses n-1 to correct for bias.
What does standard deviation tell us?
It measures how spread out data is from the mean. Low = data clustered near mean. High = data more spread out.