Z-Score Calculator

Measure how many standard deviations a value is from a mean.

Your inputs

Enter your information and select Calculate to see the result.

The z-score is (value − mean) ÷ standard deviation.

Change one assumption at a time to see which inputs have the greatest effect on the estimate.

A score of 85 with mean 70 and standard deviation 10 has z = 1.5.

This calculator is for educational use; verify important work independently.

Review this educational estimate against current quotes, official information, and your own budget before making a financial decision.