Z-score calculator

Calculate z-score calculator with clear inputs and assumptions.

Your inputs stay in your browser. Displayed results are rounded to a maximum of 12 significant digits.

Method and assumptions

Method version 1.0.0 · Updated October 17, 2026

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Formula: Calculate z-score calculator with clear inputs and assumptions.

Calculate z-score calculator with clear inputs and assumptions.

Results are estimates where noted and depend on the entered assumptions.

These short examples use the same inputs and core calculation as this tool. Adapt validation and formatting to your application.

JavaScript

const value = 85, mean = 70, standardDeviation = 10;
console.log((value - mean) / standardDeviation); // z = 1.5

TypeScript

const value = 85, mean = 70, standardDeviation = 10;
const z: number = (value - mean) / standardDeviation;
console.log(z); // 1.5

Python

value, mean, sd = 85, 70, 10
print((value - mean) / sd)  # z = 1.5

Java

System.out.println((85.0 - 70) / 10); // z = 1.5

Console.WriteLine((85.0 - 70) / 10); // z = 1.5