Free tool
IQ Percentile Calculator
Enter an IQ score to convert it to a percentile on the standard scale (mean 100, standard deviation 15). See how rare it is and where it falls on the bell curve.
Percentile
90.9
Higher than 90.9% of people
Classification
Superior
About 1 in 11 people score this high or above.
Where it sits on the bell curve
Orientative calculation on the standard 100 ± 15 scale. Not a clinical or diagnostic measure.
How the percentile is calculated
IQ scores follow a normal distribution with a mean of 100 and a standard deviation of 15. The percentile is the share of the population that scores at or below a given IQ, read from the area under the bell curve.
Common questions
What percentile is an IQ of 130?+
An IQ of 130 is about the 98th percentile — higher than roughly 98% of people, or about 1 in 44. It sits two standard deviations above the mean of 100.
What is an average IQ percentile?+
An IQ of 100 is exactly the 50th percentile: half the population scores above it and half below. Scores from 90 to 109 are all within the 'average' range.
How rare is an IQ of 140?+
An IQ of 140 is around the 99.6th percentile — roughly 1 in 260 people. Scores this high fall in the top fraction of a percent of the population.
Curious about your own IQ?
Take the free iqmetria test to get your estimated IQ and your real percentile.
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