Z Score Calculator
Z Score Calculator lets you z score measures the signed distance from the mean in standard deviations. Enter your own values or load the worked example.
- Copy or download the computed result
- Adjust observed value
- See the processing method and limits
Method and calculation
Z score measures the signed distance from the mean in standard deviations.
Inputs and settings
Z Score Calculator accepts Observed value (signed value); Mean (signed value); Standard deviation (minimum 0.000001).
Worked example
Z Score Calculator example — Observed value: 85; Mean: 70; Standard deviation: 10. Computed output: { "z": 1.5 }
Output and limitations
Z Score Calculator: Use finite inputs. Results use double-precision arithmetic.
Technical references: JavaScript numerical operations
Z Score Calculator FAQs
Z Score Calculator applies the following rule to your input: Z score measures the signed distance from the mean in standard deviations. The worked example on this page uses the same processor as the result button.
Z Score Calculator has these boundaries: Use finite inputs. Results use double-precision arithmetic. Start by checking the observed value field against the units or format shown.
Z Score Calculator provides this sample: { "z": 1.5 }. Use the sample button to reproduce it, then replace the inputs with your own values.