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Z-Score Calculator — Free Online Calculator
Z-Score Calculator solves z = (x − μ) / σ — z = z-score, x = value, μ = population mean, σ = population standard deviation. Enter your known values and the calculator solves for the rest instantly. It runs entirely in your browser, so nothing you enter is uploaded to a server. Free to use, with no signup and no watermark.
How to use Z-Score Calc
- Enter your known values in the fields.
- The result updates instantly as you type.
- Copy or note down the result.
Frequently asked questions
- What formula does Z-Score Calculator use?
- z = (x − μ) / σ — z = z-score, x = value, μ = population mean, σ = population standard deviation.
- Can I use it on my phone?
- Yes. The layout adapts to small screens and behaves the same on mobile as on desktop.
- Is my input saved anywhere?
- No. Values stay in your browser and are gone as soon as you close the tab.
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