0 z-score
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Percentile (area to the left)
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Area to the right
A z-score measures how many standard deviations a value lies from the mean: z = (x โ ฮผ) รท ฯ. The percentile is the share of a normal distribution below your value.
Frequently Asked Questions
What is a z-score?
A z-score (standard score) tells you how far a value is from the mean in units of standard deviation. A z of 0 is exactly average; +2 is two standard deviations above the mean.
Convert a value to a z-score and find its percentile on the normal distribution.