📊 Correlation Calculator
Calculate Pearson correlation coefficient
Enter the same number of values for X and Y
About Correlation Calculator
The Correlation Calculator computes the Pearson correlation coefficient (r) between two variables. This measures the strength and direction of the linear relationship between X and Y values.
How to Use
- Enter your X values separated by commas
- Enter your Y values separated by commas (same number as X)
- Click Calculate to see the correlation coefficient and r²
Understanding Results
- r = 1: Perfect positive correlation
- r = -1: Perfect negative correlation
- r = 0: No linear correlation
- r²: Proportion of variance in Y explained by X (0 to 1)
Formula
r = Σ[(Xᵢ - X̄)(Yᵢ - Ȳ)] / √[Σ(Xᵢ - X̄)² × Σ(Yᵢ - Ȳ)²]