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Coefficient of Determination Calculator

Online calculator for finding the correlation coefficient and r-squared (r2) values which depict the relationship between two data series and how well the model predicts the future outcomes. Pearson's formula is used for this calculation.

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R-Squared (r2) Value Calculation

Enter the X values separated by comma,
Enter the Y values separated by comma,
 
Result
Total Numbers (N):
Correlation Coefficient (r):
Coefficient of Determination (r2):

 
   
  
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Formula Used:

Correlation Coefficient ( r ) = N x ∑ XY - ( ∑ X ) ( ∑ Y ) / √ N x ( ∑ X2 - ( ∑ X )2 √ N x ( ∑ Y2 - ( ∑ Y )2

Coefficient of Determination ( r2 ) = r x r.

Determining r-squared (r2) value is used as a guideline to measure the accuracy of the data model.