Statistics
Z-score Calculator
Convert a raw score to a standard (z) score.
Free to use — no sign-up or login.
z-score
This free Z-score Calculator covers Convert a raw score to a standard (z) score.
Enter the Z-score Calculator fields, then read the output. Statistics calculators on this site keep the formula visible beside the form, with no account required.
Using the Z-score Calculator
Convert a raw score to a standard (z) score. Typical inputs are Value (x), Mean (μ) and Std. deviation (σ). How it works beside the form states the identity the Z-score Calculator applies.
FAQ
How do I use the Z-score Calculator?
Open the Z-score Calculator, fill Value (x), Mean (μ) and Std. deviation (σ), and read the result. Subtract the mean and divide by the standard deviation.
What formula does the Z-score Calculator use?
The Z-score Calculator uses the identity in How it works. In words: Subtract the mean and divide by the standard deviation.