Free normal distribution probability calculator to calculate normal distribution probability. Instant results in your browser — no signup.
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Primary answer and useful breakdowns.
P(Z ≤ z)
97.50%
z = 1.9600 → cumulative area ≈ 97.50%
P(Z > z)
2.50%
Z-score used
1.9600
Free normal distribution probability calculator to calculate normal distribution probability. Instant results in your browser — no signup. Uses the standard normal CDF approximation for P(Z ≤ z).
Uses the standard normal CDF approximation for P(Z ≤ z).
z = 1.96 → about 97.5% below (one-tailed).
Double the upper-tail probability for symmetric two-tailed tests.