IQ 140: meaning, percentile and rarity
An IQ of 140 sits in the exceptionally high range on the standard scale (mean 100, standard deviation 15). 99.62% of the reference population scores below this level, and 0.38% scores above it.
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- 99.62% of people score below IQ 140, and 0.38% score above it.
- Rarity
- About 1 in 260 people score IQ 140 or higher.
- Distance from the mean
- 40 points above the mean of 100 — about 2.67 standard deviations.
99.62% of people score below IQ 140, and 0.38% score above it.
What range does IQ 140 fall into?
An IQ of 140 sits in the exceptionally high range.
Scores of 140 and above are extremely rare even among high scorers, and are often described as highly gifted. At this level, small differences between tests matter more than the exact number.
How rare is IQ 140?
About 1 in 260 people score IQ 140 or higher.
Frequently asked questions
- Is an IQ of 140 a good score?
- An IQ of 140 sits in the exceptionally high range, with about 99.62% of a normal population scoring below it. Whether that counts as good depends on what the score is used for — and no single online result should be treated as a definitive measure of ability.
- How rare is an IQ of 140?
- In a normal distribution, about 1 in 260 people score IQ 140 or higher.
- What percentile is an IQ of 140?
- 99.62% of the reference population scores below IQ 140. That is its percentile rank — a position on a scale from 0 to 100, not the share of questions answered correctly.
This page describes the theoretical normal distribution (mean 100, standard deviation 15) for educational purposes. It is not a clinical assessment or a diagnosis.