Z-Score (Standard Score) Calculator

Calculate standard score z = (x - μ) / σ from raw value, mean, and standard deviation.

How It Works & Processing Standards

Enter values above to calculate results automatically. Check each input field for guidance and units.

Example: x=12, 평균=10, sd=2 → 1

Your input data is never sent to any server and is securely processed on your device.

Current Limits

  • Maximum input length: 100,000 characters

Z-Score (Standard Score) Calculator is a 100% free, browser-based online utility. All calculations and file conversions run locally inside your browser (Local-First) without sending data to remote servers, keeping your documents and inputs strictly private.

How to Use Z-Score (Standard Score) Calculator

  1. 1
    Enter Raw Value (x)Type the observed data point.
  2. 2
    Enter Mean (μ)Type the distribution average.
  3. 3
    Enter Std Dev (σ)Type the distribution standard deviation.

Common Use Cases

  • Evaluating how many standard deviations an exam score lies above average
  • Normalizing features for machine learning preprocessing
Have feedback or ideas for this tool? Suggest & Inquire →