The Bell Curve Distribution
IQ scores follow a normal distribution: most people cluster around 100, with progressively fewer people at the extremes. The graph below shows this distribution. Your score marker (shown in cyan) indicates where your score falls relative to the population.
Quick Reference Table
| IQ Score | Classification | Population % | Percentile |
|---|---|---|---|
| 130 + | Very Superior | ~2.3% | Top 2% |
| 120 – 129 | Superior | ~6.7% | Top 9% |
| 110 – 119 | High Average | ~16.1% | Top 25% |
| 90 – 109 | Average | ~50% | 25th – 75th |
| 80 – 89 | Low Average | ~16.1% | Bottom 25% |
| 70 – 79 | Borderline | ~6.7% | Bottom 9% |
| Below 70 | Extremely Low | ~2.3% | Bottom 2% |
Detailed Range Breakdown
Scores in this range indicate exceptional cognitive ability across multiple domains. Individuals in this range often excel in highly complex fields — theoretical physics, advanced mathematics, competitive law, medical research, and other domains requiring rapid synthesis of complex information.
Context: Often associated with Nobel laureates, chess grandmasters, elite academics, and many successful entrepreneurs in technically demanding industries.
Only 1 in 44 people score in this range. Tests become less precise at extremes due to ceiling effects — very high scorers are better assessed by specialised high-range tests.
Superior intelligence indicates strong performance across most cognitive domains. This range is associated with academic success at the graduate and postgraduate level, and strong professional performance in intellectually demanding careers.
Context: Typical range for many professionals in medicine, law, engineering, and science. Strong performers in business strategy and management consulting.
Approximately 1 in 14 people score in this range — uncommon, but not rare.
High average intelligence reflects above-average cognitive ability across the board. This range is associated with success in a wide range of professional and academic contexts, including most bachelor's-level degree programmes and many graduate programmes.
Context: Broadly associated with university-educated professionals across many fields — teachers, managers, accountants, journalists, nurses, and skilled tradespeople.
This range represents the top quarter of the population — a meaningful above-average score.
The average range contains fully half of the population. Scores in this range indicate typical cognitive functioning — sufficient for the vast majority of everyday tasks, most educational and vocational paths, and a rich, productive life. IQ is one of many factors in success, and average cognitive ability combined with strong motivation, emotional intelligence, and practical skills frequently outperforms higher IQ without those traits.
Context: The average range includes most people across most walks of life. IQ alone is a poor predictor of success, wellbeing, or happiness in this range.
An average IQ does not mean average potential. Conscientiousness, emotional intelligence, and grit predict life outcomes more than IQ in this range.
Scores in this range may indicate some difficulties with complex academic work, but the vast majority of people in this range function entirely independently and hold productive careers across many fields. Many factors beyond IQ determine life outcomes.
Online test scores in this range should be interpreted cautiously — anxiety, fatigue, or distraction during an online test can significantly deflate scores.
Scores in this range fall between average and what is clinically classified as intellectual disability. A single online test score in this range is not diagnostic — it should be confirmed with formal, professionally administered assessment before drawing any conclusions.
If a professional assessment is needed, please consult a clinical psychologist. Online tests cannot diagnose intellectual disability.
Scores below 70 on a professionally administered test are associated with intellectual disability in clinical classification systems (DSM-5, ICD-11). However, online test scores below 70 frequently reflect poor testing conditions rather than true cognitive limitations.
This range requires formal clinical assessment by a qualified psychologist. Online test results cannot and should not be used for clinical or educational purposes.
Important Caveats
- IQ score ranges are descriptive, not prescriptive. They describe group averages, not individual destinies.
- Online tests, including ours, have a measurement error of ±8–15 points. Your true score likely falls within a range around your result — treat it as a range, not a single precise number.
- IQ measures a subset of cognitive abilities. Emotional intelligence, creativity, practical wisdom, and character are not captured.
- IQ scores are not fully fixed. Lifestyle, education, and cognitive training all influence cognitive performance over time.
- Never make major life decisions solely based on an online IQ score. For clinical purposes, consult a qualified psychologist.
- Score inflation is common in online tests. Many popular IQ websites report scores 10–25 points higher than a user's true assessed level. Our calibration prioritises accuracy over flattery.
How to Use Your Score Constructively
Whether your score is high, average, or lower than expected, the most useful question is not "what does this number mean about me?" but rather "which of my cognitive dimensions need development, and how do I improve them?"
IQ is not a verdict. It is a snapshot of current cognitive performance under the conditions of this test, on this day. Many factors temporarily reduce scores: fatigue, anxiety, distraction, illness, or simply unfamiliarity with the test format. If your score surprised you negatively, consider taking the test again after a full night's sleep, in a quiet environment, with full attention.
If your score surprised you positively, resist the temptation to over-identify with the number. The most productive use of an IQ result is to identify your cognitive strengths (which dimensions scored highest?) and areas for development (which scored lowest?). Our cognitive improvement guide provides evidence-based strategies for each dimension.
Finally, remember that IQ tests measure a specific, narrow slice of human cognition. The full spectrum of human intelligence — creativity, social intelligence, emotional depth, practical skill, artistic ability — is not captured by any IQ score. For a deeper understanding of the six cognitive abilities our test measures, see our Cognitive Dimensions guide.