Z-score Calculator

Convert a raw score to a standard score (Z-score) and find its corresponding percentile.

Enter Population Parameters

Raw Score (X)

Mean (μ)

Standard Deviation (σ)

Results

Z-score

Percentile

Interpretation

Calculation Steps

Normal Distribution Curve

Show Probability Areas

Probability Areas

Probability	Value
P(Z < )
P(Z > )
P(- < Z < )

Disclaimer: This tool is for educational purposes only and not a substitute for professional statistical consulting.

Privacy: Data stays on this device unless you choose to export it.