Variance Calculator
Calculate population and sample variance
About this calculator
A variance calculator is an essential statistical tool that measures how spread out data points are from the mean value in a dataset. It calculates both population variance (when you have complete data) and sample variance (when working with a subset of data). This calculator is invaluable for researchers, analysts, and students who need to understand data distribution, assess risk, make statistical inferences, or perform quality control analysis in various fields including finance, science, and business analytics.
How to use
Enter your numerical data values separated by commas or spaces into the input field. Select whether you want to calculate population variance or sample variance based on your dataset type. Click the calculate button to instantly get your variance result along with related statistics like standard deviation and mean.
Frequently asked questions
What's the difference between population and sample variance?
Population variance uses all data points and divides by N, while sample variance uses a subset and divides by N-1 for better estimation.
Why is variance important in statistics?
Variance measures data spread and variability, helping assess risk, compare datasets, and make informed decisions based on data distribution patterns.
Can I calculate variance for any type of numerical data?
Yes, variance can be calculated for any numerical dataset including test scores, measurements, prices, temperatures, or any quantitative values.