Enter the value x, the mean μ and the standard deviation σ, and the calculator returns the z-score and its approximate percentile.
The number of standard deviations a value lies from the mean: z = (x − μ) / σ.
It means the value is below the mean; a positive z-score means it is above the mean.
An approximate percentage of a normal distribution that falls below your value, derived from the z-score.