Z-Score Calculator

Calculate z-score, percentile, and probability from a value, mean, and standard deviation.

Z-Score

-1.0000

Percentile

15.87%

Details

Z-Score-1.0000
Percentile Rank15.87%
P(X ≤ x)0.158655
P(X > x)0.841345

Use the Z-Score Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.