Short answer: An IQ of 126 is superior: higher than about 96 percent of people, roughly 1 in 24. It sits four points below Mensa's Wechsler cutoff of 130, so on its own it does not qualify. Because a single score carries about five points of error either way, the true level could fall anywhere from the low 120s to just past 130.
Shaded: the share of people who score higher on a mean-100, SD-15 scale.
At a glance
| Percentile | 95.85th (4.15% score higher) |
|---|---|
| Rarity | About 1 in 24 |
| Wechsler classification | Superior (WAIS-IV) / Very High (WAIS-5) |
| Stanford-Binet 5 classification | Superior |
| On an SD 16 scale | About 128 |
| On an SD 24 (Cattell) scale | About 142 |
| Mensa eligible? | No (cutoff 130, the 98th percentile) |
Where 126 falls
A 126 lies 1.73 standard deviations above the average of 100. It ranks at the 95.85th percentile; 4.15 percent of people score higher. In a company of 500 employees, about 21 would reach 126 or more.
The WAIS-IV places it in the Superior band, which spans 120 to 129. The WAIS-5 renames that band Very High. The Stanford-Binet 5 also calls 120 to 129 Superior. The complete ladder of labels is in IQ scale classification.
126 against its neighbors
| IQ | Percentile | Scoring higher | Rarity |
|---|---|---|---|
| 123 | 93.7 | 6.3% | 1 in 16 |
| 125 | 95.2 | 4.8% | 1 in 21 |
| 126 | 95.8 | 4.2% | 1 in 24 |
| 128 | 96.9 | 3.1% | 1 in 32 |
| 130 | 97.7 | 2.3% | 1 in 44 |
The band between 126 and Mensa's 130 holds about 1.9 percent of the population, close to one person in 53. Compare IQ 125, IQ 127 and the full IQ rarity chart.
The same score on older scales
On an older Stanford-Binet scale with a standard deviation of 16, a 126 becomes about 128. On the Cattell scale, where one standard deviation is 24 points, it reads as about 142. Mensa's published cutoffs on those scales are 132 and 148. The converted numbers fall short by the same margin in percentile terms, because a conversion only relabels a rank.
Why a retest proves less than it seems
The instinct after a 126 is to test again. The research counsels caution. A 2012 study by Estevis, Basso and Combs in The Clinical Neuropsychologist reported that full-scale scores on the WAIS-IV rose about 7 points when adults were retested after three or six months. The authors attributed the gain to practice, not to any real change in ability. A 126 that turns into a 133 on a second sitting mostly shows familiarity with the tasks.
Mensa's door has more than one entrance. American Mensa says it accepts qualifying scores from approximately 200 standardized tests, as long as they were properly administered. The route and the paperwork are in how to join Mensa.
Is 126 a good IQ?
Yes, and plainly so. A 126 exceeds 24 of every 25 scores. Its predictive power is clearest in school. Ian Deary and colleagues followed more than 70,000 English children and found that general intelligence at 11 correlated .81 with national exam results at 16. The link varied by subject: intelligence explained 58.6 percent of the variance in mathematics and 18.1 percent in art and design.
Those are population statistics. They say a 126 is an asset in academic work, strongest in abstract subjects. They cannot forecast one person's grades, career or satisfaction. Our explainer on what counts as a high IQ covers the wider picture.
Getting a definitive score
The number that matters comes from a standardized instrument, such as the WAIS-IV, WAIS-5 or Stanford-Binet 5, administered one-on-one by a licensed psychologist. The report should state the confidence interval, not only the single figure. Our free IQ test is a practice screener, not a diagnostic measure; are online IQ tests accurate? explains why.
Nearby scores
- IQ 128: two steps closer to the line.
- IQ 129: the last score below Mensa.
- IQ 130: the 98th-percentile threshold.
Frequently asked questions
Is 126 a high IQ?
Yes. An IQ of 126 is higher than about 96 percent of people and falls in the Superior band on both the WAIS-IV and the Stanford-Binet 5. Roughly 1 in 24 people score at or above it. It is not in the Very Superior range, which begins at 130.
Can I get into Mensa with an IQ of 126?
Not with that score alone. Mensa requires the 98th percentile, which is 130 on Wechsler-type tests; 126 is the 96th. Mensa accepts results from many approved, supervised tests, so a qualifying score on a different accepted instrument would count. Online results never do.
Could an IQ of 126 really be 130?
It is possible. A single score carries a 95 percent confidence interval of about five points either way, so a measured 126 is consistent with a true score between roughly 121 and 131. The most likely true value is still close to the measured one, and a quick retest tends to inflate results through practice.
What percentile is an IQ of 126?
On a scale with a mean of 100 and a standard deviation of 15, an IQ of 126 is at the 95.85th percentile. That means about 4.15 percent of people score higher, or roughly 1 in 24.
Sources
- IQ classification (Wikipedia) — WAIS-IV, WISC-V and Stanford-Binet 5 bands
- Estevis, Basso & Combs (2012), Effects of practice on the WAIS-IV across 3- and 6-month intervals — About 7-point FSIQ gain on retest
- American Mensa: Qualifying test scores — Scores accepted from approximately 200 tests
- Mensa International: Getting your IQ tested FAQs — 98th percentile; online tests excluded
- Deary, Strand, Smith & Fernandes (2007), Intelligence and educational achievement (ERIC record) — Correlation of .81; variance by subject
- Mensa International (Wikipedia) — Stanford-Binet 132 and Cattell 148 cutoffs
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.
