P-Value Calculator
Calculate p-values for z-tests, t-tests, and chi-square tests. Supports left, right, and two-tailed tests.
P-Value0.0404
α = 0.05Significant
α = 0.01Not significant
p < 0.05 — Statistically significant at α = 0.05
Common Critical Values
Z (α=0.05, two-tail)±1.96
Z (α=0.01, two-tail)±2.576
Z (α=0.05, one-tail)1.645
Chi-square (df=1, α=0.05)3.841