Z-Score to Percentile Calculator

Convert a z-score to a percentile.

Percentile (%) 93.319

Formula: percentile = normal CDF(z) × 100

Step-by-step with your numbers:

1. Values used:

2. Z-score = 1.5

4. Percentile = 93.319%

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Convert a standard-normal z-score into a percentile rank.

The math behind it

percentile = the area under the standard normal curve to the left of z.

z = 1.5 → ~93.3rd percentile.

Negative z?

Below the mean — under the 50th percentile.