An IQ score of 120 falls into the Superior range on the standard intelligence scale (mean = 100, standard deviation = 15). This score is notably above average — typically associated with strong academic and professional performance.
What an IQ of 120 means
120 marks the start of the superior band, which runs to 129. About 9% of people score at or above 120, roughly one in eleven. In a typical secondary-school class of 30, two or three pupils would be expected at this level. People who score around 120 often find academic work that involves abstract reasoning comfortable, though grades and careers depend at least as much on persistence, interest and study habits. A practical note: from this point upward, short online tests have fewer questions hard enough to tell scores apart, so results above 120 on a quick test carry a slightly wider margin of error than results nearer 100.
Where does an IQ of 120 rank?
On a standardized IQ test, a score of 120 places you higher than approximately 90.9% of the population. Intelligence scores follow a normal distribution — most people cluster near 100, and scores taper off sharply toward both extremes.
| Metric | Value |
|---|---|
| IQ score | 120 |
| Classification | Superior |
| Percentile | 90.9% |
| Rarity (out of 1,000) | ~91 in 1,000 score this high or higher |
| Standard deviations from mean | 1.33 |
IQ 120 in numbers
- Roughly 1 in 11 people score 120 or higher.
- In a room of 100 randomly chosen adults, about 9 would score 120 or higher.
- That is 10 points below 130, the level most high-IQ societies use as their entry line.
- Another 10 points would move this score into the Gifted band, which starts at 130.
- Even on professionally administered tests a single result has a margin of error of about five points either way, so a measured 120 is best read as somewhere between 115 and 125.
On our free IQ test
Of the 3,834 people who completed our free IQ test between April and October 2026, 83 scored exactly 120 and 34.4% scored higher. People who choose to take an online IQ test are not a random sample of the population (our average is 114.5), so this shows where a score sits among other test-takers, not among everyone. More in our 2026 data study.
Which IQ tests produce a score of 120?
A score of 120 can be produced by any standardized intelligence test that uses the mean = 100, SD = 15 scale. The most widely used tests include:
- Wechsler Adult Intelligence Scale (WAIS) — clinical gold standard for adults.
- Stanford-Binet Intelligence Scales — oldest continuously-used intelligence test.
- Mensa admissions test — used by the Mensa society for membership selection.
- Cattell-Horn-Carroll (CHC) tests — most theoretically grounded modern framework.
- Our free IQ test — instant online estimate with the same scaling.
How to interpret an IQ score of 120
Scores in the high-average to superior range are associated with strong performance in educational and analytical settings. People at this level often report that unstructured problem-solving and abstract learning feel relatively natural, though domain expertise still requires deliberate practice.
IQ 120 in Context
| IQ Range | Classification | Population % |
|---|---|---|
| Below 70 | Extremely Low | ~2.2% |
| 70–79 | Borderline | ~6.7% |
| 80–89 | Low Average | ~16.1% |
| 90–109 | Average | ~50% |
| 110–119 | High Average | ~16.1% |
| 120–129 | Superior | ~6.7% |
| 130+ | Gifted / Very Superior | ~2.2% |
Factors That Influence Your Score
Your IQ score reflects a combination of genetic potential and environmental influences including education, nutrition, health, and the testing conditions themselves. Factors like fatigue, anxiety, unfamiliarity with the test format, and even the time of day can all affect performance. A single test score should be viewed as an estimate, and scores can vary by several points between testing sessions.
Nearby scores
Compare the major IQ tests
Which test produces the most accurate score depends on what you're trying to measure. These head-to-head comparisons break down the differences:
- WAIS vs Stanford-Binet — the two clinical heavyweights compared.
- Mensa vs WAIS — entry-test speed vs full clinical assessment.
- Stanford-Binet vs Mensa — which one actually gets you into Mensa.
- CHC vs Wechsler — modern cognitive framework vs the classic.
- Raven vs Cattell — non-verbal alternatives for cross-cultural testing.
Further reading
- What is a good IQ score?
- What does your IQ score mean?
- Average IQ by age
- Mensa requirements
- IQ test types compared
Want to find out your IQ score?
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Take the Free IQ TestFrequently asked questions
Is IQ 120 considered good?
An IQ of 120 is above average (91th percentile). It's associated with strong academic and analytical performance, though IQ is only one dimension of overall ability.
Can an IQ of 120 change over time?
IQ scores are relatively stable in adulthood but can shift modestly with education, engagement, sleep, and health. Short-term factors like stress and fatigue can move a single test result by 5–10 points in either direction — which is why we recommend comparing results across multiple sessions rather than reading too much into any single score.
What percentile is IQ 120?
An IQ of 120 corresponds to the 90.9th percentile on the standard bell curve — meaning it is higher than about 91 out of every 100 people.