Variance & Standard Deviation Calculator
Enter a dataset and instantly get mean, variance, standard deviation, median, mode, range and more — for both population and sample formulas.
What Does This Tool Do?
Calculate a full set of descriptive statistics from any dataset: mean, sample and population variance, standard deviation, median, mode, range, sum and count.
Key Features
10 Statistics
Mean, variance, std dev, median, mode, range and more.
Sample & Population
Both formulas shown and calculated.
Formulas
Variance formulas explained in result.
Instant
Immediate calculation.
How to Use
- Enter your numbers separated by commas or spaces.
- Click Calculate Statistics.
- Read all descriptive statistics in the result.
Frequently Asked Questions
What is the difference between population and sample variance?▾
Population variance divides by N (all data). Sample variance divides by N−1 (Bessel's correction) to give an unbiased estimate when working with a sample from a larger population.
What is standard deviation?▾
Standard deviation is the square root of variance. It measures the average distance of each data point from the mean, in the same units as the original data.
When do I use sample vs population variance?▾
Use population variance when you have all data points (e.g. all test scores in a class). Use sample variance when your data is a sample from a larger population (e.g. survey results).
Complete Guide to Variance & Standard Deviation Calculator
When To Use This Tool
Use Variance & Standard Deviation Calculator whenever you need fast, accurate output without installing software. This tool is designed for speed, clarity, and repeatable results for day-to-day work.
Best Practices for Accurate Results
- Double-check the format of your input before running the tool.
- Test with a small sample first, then process larger data.
- Use Related Tools to verify, convert, or transform the output.
Why Users Prefer AdeDX
AdeDX tools are browser-based, free to use, and built to work across desktop and mobile devices. Most processing happens directly in your browser for fast performance and improved privacy.