Z-Score: Score 50, Mean 50, SD 5 (At the Mean)
A data point of 50 with mean 50 and SD 5 gives a z-score of 0, confirming the value is exactly at the distribution mean.
How to use this tool
- Enter data point (x), mean (μ) and standard deviation (σ) in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your z-score and the full breakdown beneath it.
See what a z-score of zero looks like when a data point equals the mean of its distribution.
Frequently asked questions
- What does a z-score mean?
- A z-score of +1 means the value is 1 standard deviation above the mean; −2 means 2 standard deviations below. Z-scores allow comparison across different scales and distributions.