Correlation Calculator
Calculate Pearson correlation coefficient (r), R-squared, and linear regression. Analyze relationship between variables. Free online correlation calculator.
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Correlation Interpretation
r = 1: Perfect positive correlation
0.7 to 1: Strong positive correlation
0.3 to 0.7: Moderate positive correlation
0 to 0.3: Weak positive correlation
r = 0: No correlation
-0.3 to 0: Weak negative correlation
-0.7 to -0.3: Moderate negative correlation
-1 to -0.7: Strong negative correlation
r = -1: Perfect negative correlation
Pearson Correlation Formula
r = [nΣxy - (Σx)(Σy)] / √[(nΣx² - (Σx)²)(nΣy² - (Σy)²)]
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