Point-Biserial Correlation Calculator
Calculate correlation between a binary and continuous variable
About Point-Biserial Correlation
Point-biserial correlation measures the relationship between a dichotomous variable (0/1) and a continuous variable.
It's mathematically equivalent to Pearson's r when one variable is binary.
Formula: rpb = (M₁ - M₀) / s × √(n₀n₁ / n(n-1))
Uses: Item analysis, comparing test scores between groups, gender differences.
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.