Z-Score
Express a value’s distance from a reference mean in standard deviations.
Your numbers
Z-score
Use consistent units. The result follows the assumptions you enter.
Scenario comparison
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Formula
z=(x−μ)/σ
Express a value’s distance from a reference mean in standard deviations.
Worked example
- Observed value
- 85
- Reference mean
- 70
- Reference standard deviation
- 5
- Z-score
- 3
Scope and limitations
Use consistent units. The result follows the assumptions you enter.
Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.
Check your units and assumptions before relying on a result. Changing a label does not convert a currency or physical unit.
Formula version: 3d3c956b5d5f · Example checked: