Short answer: An IQ of 127 is superior: higher than about 96.4 percent of people, roughly 1 in 28. It falls three points below Mensa's Wechsler cutoff of 130, so it does not qualify on its own. On older SD 16 Stanford-Binet norms the same standing reads as about 129; on the SD 24 Cattell scale, about 143.
Shaded: the share of people who score higher on a mean-100, SD-15 scale.
At a glance
| Percentile | 96.41st (3.59% score higher) |
|---|---|
| Rarity | About 1 in 28 |
| Wechsler classification | Superior (WAIS-IV) / Very High (WAIS-5) |
| Stanford-Binet 5 classification | Superior |
| On an SD 16 scale | About 129 |
| On an SD 24 (Cattell) scale | About 143 |
| Mensa eligible? | No (needs 130 on Wechsler-type tests) |
127 at a glance
An IQ of 127 is 1.8 standard deviations above the mean. It ranks at the 96.41st percentile, and 3.59 percent of people score higher. In a graduating class of 250, about nine students would reach it.
The Wechsler adult scale calls the 120 to 129 range Superior; its fifth edition relabels it Very High. The Stanford-Binet 5 also uses Superior for 120 to 129. Every label and cutoff appears in our IQ classification guide.
How rare is a 127?
| IQ | Percentile | Share above | One in |
|---|---|---|---|
| 124 | 94.5 | 5.5% | 18 |
| 125 | 95.2 | 4.8% | 21 |
| 127 | 96.4 | 3.6% | 28 |
| 129 | 97.3 | 2.7% | 38 |
| 131 | 98.1 | 1.9% | 52 |
Scores of 127, 128 and 129 together cover about 1.3 percent of the population: people well above average who still sit outside Mensa. The neighbors are IQ 125 and IQ 129; the whole curve is on the IQ rarity chart.
Measuring the gap to Mensa
Mensa sets its bar at the 98th percentile. A 127 stands at the 96th, about 1.6 percentile points short. The shortfall looks the same on every scale: Mensa asks for 132 on the Stanford-Binet, where a 127 converts to about 129, and 148 on the Cattell scale, where it converts to about 143.
Measurement error cuts both ways. A single score carries a band of about five points, so a measured 127 does not rule out a true score of 130, nor one in the low 120s. The admission routes are set out in how to join Mensa.
Is 127 a good IQ? What the long-term data show
Yes. The better question is what it forecasts. In a 2007 meta-analysis in the journal Intelligence, Estonian sociologist Tarmo Strenze pooled longitudinal studies that measured intelligence early and success later. In the strongest studies, with intelligence tested before 19 and outcomes measured after 29, the corrected correlations were .56 with education, .43 with occupational status and .20 with income.
Read plainly, IQ is a powerful predictor of how far people go in school, a solid one for the status of their job, and a modest one for pay. Strenze also found intelligence was not an overwhelmingly better predictor than parental socioeconomic status or school grades. A 127 tilts the odds; it does not write the story. Our guide to what a high IQ means adds context.
What the number leaves out
An IQ test samples a defined set of skills: verbal reasoning, visual problem-solving, working memory and processing speed. It does not sample motivation, conscientiousness, creativity, social judgment or the expertise people build over years of practice. Those traits help explain why every correlation above stops well short of 1.0. Two people with identical 127s can end up in very different careers for reasons no test item captures.
How to confirm a 127
A reliable figure comes from a full standardized battery, such as the WAIS-IV, WAIS-5 or Stanford-Binet 5, given in person by a licensed psychologist, with the confidence interval printed beside the score. Mensa accepts only supervised results. Our free IQ test is a practice screener that gives a rough estimate; are online IQ tests accurate? explains its limits.
Scores near 127
- IQ 126: four points from Mensa, and what a retest can show.
- IQ 128: two points below the line.
- IQ 130: the 98th-percentile threshold itself.
Frequently asked questions
Is 127 a good IQ?
Yes. A 127 is higher than about 96 percent of people and falls in the Superior band on the WAIS-IV and the Stanford-Binet 5. Research links scores in this range with longer schooling and higher-status jobs on average, though the connection to income is modest.
What percentage of people have an IQ of 127 or higher?
About 3.6 percent of people score 127 or higher on a test with a mean of 100 and a standard deviation of 15. That works out to roughly 1 person in 28, or about 36,000 residents in a city of one million.
Is an IQ of 127 enough for Mensa?
No. Mensa requires the 98th percentile on an approved, supervised test, which is 130 on Wechsler-type scales. A 127 ranks at the 96th percentile. If an applicant has a qualifying score from another accepted, properly administered test, that result can be submitted instead.
Is 127 considered gifted?
Modern scales mostly reserve gifted language for 130 and above. The Stanford-Binet 5 labels 120 to 129 Superior and starts Gifted or very advanced at 130. School programs set their own definitions, and some consider scores in the mid-120s alongside achievement and other evidence.
Sources
- Strenze (2007), Intelligence and socioeconomic success: A meta-analytic review of longitudinal research, Intelligence 35 — Correlations of .56, .43 and .20
- Strenze (2007), ERIC abstract — Comparison with parental SES and grades
- IQ classification (Wikipedia) — WAIS-IV, WISC-V and Stanford-Binet 5 bands
- Mensa International: Getting your IQ tested FAQs — 98th percentile; supervised tests only
- Mensa International (Wikipedia) — Cutoffs of 130, 132 and 148
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.
