ZZ-score Calculator
Find how many standard deviations a value is from the mean.
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About this calculator
Free Z-score Calculator — find the standard score of a value from the mean and standard deviation.
How to use
Enter your Raw Score (x), Mean (μ), Std. Deviation (σ) above — the result updates instantly as you type or drag the sliders. It's free and needs no sign-up.
Frequently Asked Questions
What does the Z-score Calculator do? ▼
Find how many standard deviations a value is from the mean.
How does the Z-score Calculator work out the answer? ▼
The Z-score Calculator applies the standard mathematical formula for this problem to the values you enter and returns the exact result instantly.
How do I use the Z-score Calculator? ▼
Enter your values using the input fields or sliders. The result updates instantly — no submit button needed. All calculations run in your browser.
Can I use the Z-score Calculator for homework or study? ▼
Absolutely. The Z-score Calculator is a great way to check your work and understand the steps. Try solving the problem yourself first, then compare with the calculator.
Is the Z-score Calculator free? ▼
Yes — completely free. No sign-up, no download, and no account required. Works in any browser.