Variance Calculator
Calculate sample or population variance to measure how spread out your data values are from the mean
Use when data is a subset of a larger group (divides by n-1)
Enter numbers separated by commas, spaces, or newlines
Related Calculators
You might also find these calculators useful
Calculate Variance with Step-by-Step Solution
Variance measures how far each data point is from the mean on average, squared. Our calculator shows the complete breakdown of deviations, making it perfect for learning statistics or verifying your calculations. Get both sample and population variance with detailed steps.
What is Variance?
Variance (σ² or s²) is the average of squared differences from the mean. It tells you how spread out your data is. A variance of 0 means all values are identical to the mean. Higher variance means data is more spread out. Standard deviation is simply the square root of variance.
Variance Formula
s² = Σ(xᵢ - x̄)² / (n-1)How to Calculate Variance
Variance Calculator Applications
Statistics Education
Learn variance calculation with step-by-step breakdown.
Quality Control
Measure consistency in manufacturing processes.
Finance
Analyze investment risk and portfolio diversification.
Research
Assess data variability in experiments.
Frequently Asked Questions
Standard deviation is the square root of variance. While variance is in squared units (which can be hard to interpret), standard deviation is in the original units of your data, making it more intuitive for understanding spread.