Variance Calculator
Calculate the variance and standard deviation of numbers. Supports CSV/Excel format data import.
Frequently Asked Questions
What is variance?
Variance measures how spread out numbers are from their average. It's the average of the squared differences from the mean. A higher variance indicates more spread in the data.
What is standard deviation?
Standard deviation is the square root of variance. It measures the average distance of data points from the mean, expressed in the same units as the original data.
When should I use variance vs standard deviation?
Use standard deviation when you want to understand spread in the same units as your data. Use variance for mathematical calculations or when working with multiple datasets.
What's the difference between population and sample variance?
Population variance divides by N (total count), while sample variance divides by N-1. This calculator computes population variance by default, which is appropriate when you have complete data.
How do I interpret the results?
Lower variance/standard deviation means data points are closer to the average (less spread). Higher values indicate more variability in your dataset.
All Calculator Tools
Explore our complete collection of mathematical calculators. Each tool is designed for accuracy, speed, and ease of use.
Average Calculator
Calculate the mean (average) of multiple numbers with detailed steps.
Use CalculatorAverage of 2 Numbers
Quick and simple calculator for finding the average of two numbers.
Use CalculatorSummation Calculator
Calculate series using sigma notation with step-by-step solutions.
Use CalculatorInfinite Sum Calculator
Evaluate convergent infinite series including geometric and p-series.
Use CalculatorRiemann Sum Calculator
Approximate definite integrals using various Riemann sum methods.
Use CalculatorWhy Choose Our Calculators?
Get instant results with mathematical precision you can trust.
All calculations happen locally in your browser. No data stored or shared.
Works perfectly on all devices - desktop, tablet, and mobile.