AllEasyToolsMathematics
Z score
Z score: calculate from your inputs and inspect the formula. No account required. Processing stays in your browser.
z = (x−μ)/σ
Check units and the formula domain. Numerical results are rounded.
How to use this calculator
- Identify the quantities and convert them to the units shown.
- Apply the formula first, then compare with the substitution and result.
- Check the assumptions and whether the order of magnitude makes sense.
Levels are approximate topic groupings, not a complete curriculum for every country. Numerical results are rounded and may lose precision for extreme or nearly singular inputs.
A practical example
Use these sample inputs to check the calculation before entering your own values.
- Value x
- 85
- Mean μ
- 70
- Standard deviation σ
- 10
Result for this example
- Z score
- 1.5