P Value Calculator

Compute two-tailed P values from Z, t, r correlation, or Chi-square statistics.

Z score can be positive or negative. Two-tailed P value.
Statistical Significance
Two-tailed P value
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Enter values and press Calculate button.
Interpretation: P value below 0.05 suggests statistical significance. Smaller values indicate stronger evidence against the null hypothesis. All calculations use two-tailed probabilities.
Based on standard statistical distributions: normal, t, chi-square, and correlation via t-transformation. Two-tailed P values.