IQ 186
Profoundly Gifted
Quick answer
Yes, and it is extremely rare. An IQ of 186 is higher than all but about 1 in 200 million people.
That is 26 points beyond the ceiling most major tests publish, so the number itself is less certain than its rarity suggests.
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Where 186 falls on the bell curve
This wider chart runs to 200 so 186 can be shown in place. The curve is so thin out here that the share of people beyond the marker is invisible at this scale.
IQ 186: beyond what most tests can measure
186 is 5.73 standard deviations above the mean. On a bell curve that works out to about 1 in 200 million people, which would mean fewer than one (0.34 expected) in the UK and about 40 worldwide. The bell curve is a model, though, and at this height it is doing most of the work.
Major individually administered adult tests typically report full-scale scores up to about 160. A reported number above that usually comes from extended norms, a different scale or extrapolation.
Real populations may not follow the bell curve perfectly in the far tails, so rarity figures this extreme are illustrations, not head counts.
How claims like "186 IQ" arise
A 186 almost never comes from a modern, supervised adult test. It usually comes from somewhere like this:
- Ratio IQ. Early childhood tests divided mental age by real age. A 6-year-old solving puzzles like a typical 11.2-year-old got a ratio IQ of 186. Modern deviation IQs do not work this way.
- Unnormed online quizzes. A test with no norm data can print any number. Very high outputs usually say more about the scoring than the person.
- Repetition without a source. Numbers attached to celebrities are often copied from site to site with no test report behind them.
Famous estimates: Newton, da Vinci and the 160+ club
37 of the historical profiles on this site carry an estimate of 160 or more, and 1 reaches 186 or higher. Isaac Newton and Leonardo da Vinci are the classic examples. Their numbers are retrospective judgements based on their work, not test scores.
Estimates this high mostly reflect how extraordinary the achievement was. That is a different thing from how someone would perform on a timed reasoning test.
How many people have an IQ of 186 or higher?
On a bell curve with a mean of 100 and a standard deviation of 15, about 0.00000049% of people score 186 or higher. Applied to whole populations:
| Where | Population | IQ 186 or higher |
|---|---|---|
| UK | about 68 million | fewer than one (0.34 expected) |
| US | about 335 million | about 2 |
| World | about 8.1 billion | about 40 |
You would need the whole US to expect about 2 people at 186 or higher.
About 1 in 510 million people would score exactly 186, meaning between 185.5 and 186.5 on a continuous scale. In the UK that is fewer than one person.
The figures are bell curve estimates for whole populations, children included, and rounded. Real tests are normed separately and will differ a little.
How rare is an IQ of 186?
An IQ of 186 or higher is 6.8 times rarer than 181 or higher, and 191 or higher is 7.5 times rarer again. At this point on the curve, each extra point makes a score about 48% rarer.
What your 186 could really be. No test is precise this far out. Even a 5-point error band, from 181 to 191, spans a rarity gap of about 51 times, so the exact number matters much less than "very far above average".
Which scale was it on? A 186 reported on an SD 16 scale converts to about 181 on the usual SD 15 scale, and one from an SD 24 scale (seen in some Cattell-style results) to about 154. Check which scale your score report used.
Famous people with an estimated IQ near 186
Estimates this high are reserved for a small group of scientists, artists and thinkers. These are the closest to 186. Every figure below is a retrospective estimate, not a measured score. Open a profile to see the evidence and how confident anyone can be.
Fictional characters near 186
For fun, not science: fan estimates for the characters nearest 186, based on how they reason in their stories.
186 compared with nearby scores
The scores one and five points either side of 186, plus the round numbers from 100 to 150, side by side. Tap any score for its full page.
| IQ | Classification | Percentile | Score higher |
|---|---|---|---|
| IQ 10086 lower | Average | 50th | 50% |
| IQ 11076 lower | High Average | 74.8th | 25% |
| IQ 12066 lower | Superior | 90.9th | 9.1% |
| IQ 13056 lower | Gifted | 97.7th | 2.3% |
| IQ 14046 lower | Gifted | 99.62nd | 0.38% |
| IQ 15036 lower | Genius | 99.96th | 0.043% |
| IQ 1815 lower | Profoundly Gifted | 99.9999966th | 0.0000033% |
| IQ 1851 lower | Profoundly Gifted | 99.99999926th | 0.00000073% |
| IQ 1871 higher | Profoundly Gifted | 99.99999966th | 0.00000033% |
| IQ 1915 higher | Profoundly Gifted | 99.999999934th | 0.000000066% |
Is 186 a good IQ?
It is about as high as the scale goes. The bell curve puts 186 at 1 in 200 million, but major tests are only checked up to around 160, so the exact figure is uncertain. As a description of reasoning ability, "exceptional" fits better than any precise number.
What percentile is an IQ of 186?
A 186 is at roughly the 99.9999995th percentile on the standard scale, where the mean is 100 and the standard deviation is 15. Put simply, it beats 99.9999995% of people. A retest range of 181 to 191 would cover the 99.9999966th to 99.999999934th percentile.
Is 186 genius level?
The genius label is informal, but 186 sits far above the 140 to 145 range where it usually starts. Real-world genius is judged by achievement, and the famous examples, from Newton to da Vinci, have estimated rather than measured IQs. No test measures 186 precisely.
What does an IQ of 186 mean?
It means you scored 5.73 standard deviations above average on the kind of reasoning an IQ test samples, which this site classes as Profoundly Gifted. Most tests cannot measure this high precisely. It measures reasoning on that test, not knowledge, creativity or character.
How rare is an IQ of 186?
186 or higher happens in about 1 in 200 million people. In the UK that is fewer than one person. Scoring exactly 186, meaning 185.5 to 186.5 on a continuous scale, is about 1 in 510 million. Both figures come from the standard bell curve, not a census.
What is the mental age for an IQ of 186?
Mental age is a childhood measure. On the old ratio scale, a 12-year-old with an IQ of 186 performed like a typical 22.3-year-old. For adults the idea breaks down, because reasoning scores stop rising with age, so modern tests compare you with people of your own age.