Z-Score Calculator

Calculate z = (x − μ) / σ

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About Z-Score Calculator

A z-score calculator that converts raw values to standard scores: z = (x − μ) / σ. Shows percentile rank, probability from z-table, and how many standard deviations a value is from the mean. Includes reverse lookup (z to raw value). All calculations are client-side. Essential for statistics, quality control, and data analysis.

Z-Score Calculator Features

  • Z-score
  • Percentile
  • Probability
  • Reverse lookup
  • Distribution

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