Explanation

What is Z-score?

A z-score shows how many standard deviations a value is from the mean.

What this calculator does

Compute z-score from value, mean, and standard deviation.

Inputs you need

• Value (x)
• Mean (μ)
• Standard deviation (σ)

Formula

z = (x - mean) / standard deviation

Example

x=92, mean=85, sd=6:

• z ≈ 1.17

Quick input set you can try:

• Value (x): 92
• Mean (μ): 85
• Standard deviation (σ): 6

FAQ

1) What does this calculator help with? It helps you calculate Z-score quickly and with consistent formulas.

2) Which formula is used? It uses the standard method shown in the formula section on this page.

3) Can I use decimal values? Yes. Decimal values are supported for most numeric fields.

4) Should I rely on this for final decisions? Use it as a practical estimate, and verify critical decisions with official documents or expert advice.