Calculate the Z-score to see how many standard deviations a value is from the mean.
Calculate the Z-score to see how many standard deviations a value is from the mean.
Z = (X – μ) / σ
Value 85, Mean 75, SD 10 → Z = 1.0 (1 SD above mean).
Enter your values in the fields above and click "Calculate" to get instant results. All calculations happen in your browser — nothing is sent to any server.
What is Z-Score Calculator?
Calculate the Z-score to see how many standard deviations a value is from the mean.
What formula does this use?
This calculator uses: Z = (X – μ) / σ
Is this calculator free?
Yes! All calculators on CalcNest AI are 100% free with no account required.
Is my data safe?
Absolutely. All calculations run locally in your browser. We never store or transmit your input data.