OneFreePlace
FREE ONLINE TOOL

Free Z-Score
Calculator

Calculate z-scores from raw values or sample means, reverse z-scores back to raw values, and standardize whole datasets with percentiles and z-score tables.

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About Free Z-Score Calculator

Convert raw values to z-scores, calculate a z-statistic for a sample mean, reverse a z-score back to its raw value, or standardize an entire dataset. Percentile context is included without requiring another tool.

Workspace options

  • Dataset SD

Available actions

  • Value → z
  • Sample mean → z
  • z → raw value
  • Standardize dataset
  • Calculate z-score
  • Load example