Formula
Z = (x − μ) / σZ-Score Calculator
Z-Score Calculator
Calculate the standard score (Z-score) of any raw value in a normal distribution. Shows how many standard deviations a value is from the mean.
System Generated Results
Z-Score
1.5000
1.50σ above mean
Statistical Interpretation
Within ±2σ (95% of distribution)
Raw Value (x)85
Mean (μ)70
Std Dev (σ)10
x − μ15
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