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Use our free correlation calculator to find the Pearson correlation coefficient r, r², covariance, and interpret the strength and direction of the linear relationship.
Pearson correlation coefficient r measures the strength and direction of a linear relationship between two variables. r ranges from -1 (perfect negative) to +1 (perfect positive).
r = (n∑xy - ∑x∑y) / √((n∑x²-(∑x)²)(n∑y²-(∑y)²))Percentage: The percentage value you want to apply
Number: The original number or value
Result: The calculated result
Result: 1.000000
Result: 0.000000
CalculateMe Team
Last updated: 2026-07-14