Short answer: An IQ of 131 is very superior: higher than about 98 percent of people, roughly 1 in 52. On a supervised Wechsler-type test (mean 100, SD 15) it clears Mensa's 130 cutoff by a single point. Because any one score carries an error band of about five points either way, a retest could land on either side of that line.
Shaded: the share of people who score higher on a mean-100, SD-15 scale.
At a glance
| Percentile | 98.06th (1.94% score higher) |
|---|---|
| Rarity | About 1 in 52 |
| Wechsler classification | Very Superior (WAIS-IV) / Extremely High (WAIS-5) |
| Stanford-Binet 5 classification | Gifted or very advanced |
| On an SD 16 scale | About 133 |
| On an SD 24 (Cattell) scale | About 150 |
| Mensa eligible? | Yes, on a supervised, approved test |
What an IQ of 131 means
An IQ of 131 sits 2.07 standard deviations above the population mean of 100. That places it at the 98.06th percentile: only 1.94 percent of people score higher. On the WAIS-IV it falls in the Very Superior band, which starts at 130. The newer WAIS-5 calls the same band Extremely High, and the Stanford-Binet 5 labels 130 to 139 Gifted or very advanced. The full IQ classification bands show where each label begins.
A full-scale IQ is a composite. On the Wechsler adult scale it pools four index scores: verbal comprehension, perceptual reasoning, working memory and processing speed. Two people with a 131 can reach it by very different routes, one through vocabulary and verbal reasoning, another through speed and visual puzzles.
How rare is 131?
Roughly 1 in 52 people score 131 or higher. In a stadium of 50,000 fans, about 970 would. In a city of one million, about 19,400.
| IQ | Percentile | Share scoring higher | Rarity |
|---|---|---|---|
| 129 | 97.3 | 2.7% | 1 in 38 |
| 130 | 97.7 | 2.3% | 1 in 44 |
| 131 | 98.1 | 1.9% | 1 in 52 |
| 132 | 98.4 | 1.6% | 1 in 61 |
| 133 | 98.6 | 1.4% | 1 in 72 |
This far out on the curve, each additional point thins the crowd by roughly 15 percent. The full ladder is on the IQ rarity chart; the neighboring pages cover IQ 130 and IQ 132.
The first whole number past the 98th percentile
Mensa's rule is a percentile, not a number. Mensa International admits anyone who scores at or above the 98th percentile on an approved intelligence test that was properly administered and supervised. On a scale with a standard deviation of 15, the exact 98th percentile falls at 130.8. Mensa's published Wechsler cutoff is 130, a hair below that mark; 131 is the first whole number that clears the percentile itself.
The same percentile carries different numbers on different tests. Mensa lists 130 on Wechsler scales, 132 on the Stanford-Binet and 148 on the Cattell scale. A 131 converts to about 133 on an SD 16 scale and about 150 on the SD 24 Cattell scale, so it clears all three. The application steps are in our guide on how to join Mensa.
A one-point margin, a five-point error band
No IQ score is exact. The WAIS-IV full-scale IQ posts internal-consistency reliability of .97 to .98, among the highest figures in psychological testing. Even so, an observed score carries a 95 percent confidence interval of roughly five points in each direction. For a 131, that band runs from about 126 to 136.
The honest reading: a 131 places a person very probably in the top few percent, and plausibly just under or comfortably over the Mensa line. Retesting does not settle it cleanly. A 2012 study in The Clinical Neuropsychologist found WAIS-IV full-scale scores rose about 7 points on retest after three or six months, gains the authors attributed to practice rather than genuine change.
Is 131 a good IQ?
By the numbers, yes: a 131 outscores 98 of every 100 people. What it predicts is narrower than the label suggests. The American Psychological Association task force report Intelligence: Knowns and Unknowns (1996) put the correlation between IQ and school grades at about .50. That accounts for roughly a quarter of the variation in grades. The other three quarters come from effort, teaching, health, interest and circumstance.
Scores in this range describe statistical tendencies, not destinies. A 131 raises the odds of handling abstract, fast-moving coursework and complex work. It guarantees no achievement, creativity or judgment, and it says nothing about character. Our explainer on what counts as a high IQ places the range in context.
How to get a 131 that counts
Only a supervised, standardized test produces a number Mensa or a clinician will accept. The standard adult instruments are the WAIS-IV or WAIS-5 and the Stanford-Binet 5, given one-on-one by a licensed psychologist. Mensa also runs its own supervised admission sessions. Mensa International states plainly that online tests cannot be used for admission.
Our free online IQ test is a practice screener: a quick, rough read, not a clinical measurement. Why internet results drift high or low is covered in are online IQ tests accurate?
Scores around 131
- IQ 129: one step under the Mensa line.
- IQ 133: about 1 in 72, a safer margin.
- IQ 135: the doorstep of the top 1 percent.
- Top 1 percent IQ: where that cutoff really falls.
Frequently asked questions
Is 131 a high IQ?
Yes. An IQ of 131 is higher than about 98 percent of the population and falls in the Very Superior band of the WAIS-IV. Only about 1 in 52 people score at that level or above. It is high, but it sits at the entrance of the gifted range rather than deep inside it.
What percentile is an IQ of 131?
On the standard scale with a mean of 100 and a standard deviation of 15, an IQ of 131 is at the 98.06th percentile, so about 1.94 percent of people score higher. On an older SD 16 scale, the same standing reads as roughly 133; on the SD 24 Cattell scale, roughly 150.
Can you join Mensa with an IQ of 131?
Yes, provided the 131 came from an approved intelligence test that was properly administered and supervised. Mensa's Wechsler cutoff is 130. Online results, including practice tests, are not accepted. Applicants usually sit a supervised Mensa test or submit qualifying scores from an approved test taken elsewhere.
Is 131 a genius-level IQ?
No modern test defines genius. The Wechsler and Stanford-Binet scales stop at labels such as Very Superior and Gifted. A 131 marks strong reasoning ability. Genius, in the historical sense, is judged by the work a person produced, not by a test score. Our guide to what IQ counts as genius covers the debate.
Sources
- Mensa International: Getting your IQ tested FAQs — 98th percentile rule; supervised tests; online tests not accepted
- Mensa International (Wikipedia) — Cutoffs of 130 Wechsler, 132 Stanford-Binet, 148 Cattell
- IQ classification (Wikipedia) — WAIS-IV, WISC-V and Stanford-Binet 5 bands
- Canivez (2010), review of the WAIS-IV, Mental Measurements Yearbook — FSIQ reliability .97-.98; score range 40-160
- Estevis, Basso & Combs (2012), Effects of practice on the WAIS-IV — About 7-point FSIQ gain on retest
- Intelligence: Knowns and Unknowns (Neisser et al., 1996) — IQ-grades correlation of about .50
Editorial standard: IQ figures for historical figures are retrospective estimates and are labeled as such; scores for living people appear only when the person disclosed them or a reputable outlet reported them. Corrections: contact the editors.
