Z-score calculator

Calculate z-score with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use z-score to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Value
80
Mean
50
Standard deviation
10
Z-score
3

Try another scenario

Value
88
Mean
50
Standard deviation
10
Z-score
3.8
Calculation method

Calculation method

Z-score

(a-b) ÷ c

Symbols and units
a
Value
b
Mean
c
Standard deviation

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • A z-score expresses signed distance from the mean in standard deviation units.
Are these inputs private?

These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.

Further reading

Method reference ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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