Pearson r to P-Value Calculator

This calculator converts Pearson correlation coefficients (r) to p-values, testing whether a correlation is statistically significant.

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About Pearson Correlation

Pearson's correlation coefficient (r) measures the linear relationship between two continuous variables. It ranges from -1 (perfect negative correlation) to +1 (perfect positive correlation), with 0 indicating no linear relationship.

Interpreting r Values

  • |r| = 0.00-0.19: Very weak
  • |r| = 0.20-0.39: Weak
  • |r| = 0.40-0.59: Moderate
  • |r| = 0.60-0.79: Strong
  • |r| = 0.80-1.00: Very strong

Null Hypothesis

H₀: ρ = 0 (there is no correlation between the two variables in the population)

When to Use

  • Testing significance of a correlation
  • Both variables are continuous
  • Relationship is approximately linear
  • No significant outliers
Calculate P-Value from r