IQ Score Chart: What Every Score Range Really Means

IQ scores mean very little without context. A score of 115 sounds high — but is it? A score of 95 sounds mediocre — but where does it actually sit in the real distribution of adults? And what do psychologists actually call these ranges?

This page gives you the complete picture. Every range, every label, the exact percentile, and an honest description of what it means — without the flattery most IQ sites inject to keep you clicking.

The Complete IQ Score Chart

IQ Range	Classification	Percentile	% of Population
145+	Exceptionally Gifted	99.9th	0.1%
130–144	Gifted / Very Superior	98th–99.9th	2%
120–129	Superior	91st–97th	6.7%
110–119	High Average	75th–90th	16.1%
90–109	Average	25th–74th	50%
80–89	Low Average	9th–24th	16.1%
70–79	Borderline	2nd–8th	6.7%
Below 70	Intellectual Disability Range	Below 2nd	2%

These classifications follow the system used by the Wechsler Adult Intelligence Scale (WAIS-IV) — the gold standard clinical IQ instrument used by psychologists worldwide. Other frameworks use slightly different labels but the underlying percentile bands are consistent.

Each Range Explained in Plain Language

145+ — Exceptionally Gifted (Top 0.1%)

Fewer than 1 in 1,000 adults score in this range on a properly normed test. This is the territory of prodigious mathematical ability, rapid acquisition of complex systems, and the kind of pattern recognition that feels almost involuntary to the person experiencing it. People in this range often describe feeling cognitively isolated — thinking in ways that are difficult to share with most people around them. Notable figures estimated or tested in this range include many prominent mathematicians, physicists, and chess grandmasters.

130–144 — Gifted / Very Superior (Top 2%)

This is the range required for Mensa membership (top 2%). About 1 in 50 adults scores here. People in this range typically find academic learning comes naturally, process complex information quickly, and tend toward careers requiring sustained analytical thinking. This range is well-represented among doctors, lawyers, engineers, and academics — though certainly not exclusively. Many people in this range feel mildly out of sync with mainstream intellectual pace without necessarily being able to articulate why.

120–129 — Superior (Top 6–9%)

A score in this range places you solidly in the top tenth of the adult population. This is the range most commonly associated with strong academic performance, professional success in demanding fields, and the ability to learn complex skills efficiently. The difference between this range and the gifted ranges above is primarily one of speed and automaticity rather than fundamental capacity. People here can do everything the gifted range can — it may simply take more deliberate effort.

110–119 — High Average (Top 10–25%)

This is a comfortable above-average range representing about one in six adults. People scoring here are generally capable across all mainstream academic and professional demands. They handle complex information competently, learn new skills reliably, and perform well when they apply sustained effort. This range is probably the most "invisible" in terms of cognitive identity — above average enough to be capable, not exceptional enough to feel distinctly different from peers.

90–109 — Average (Middle 50%)

This broad band contains half the adult population. It is worth emphasising just how wide this range actually is — the difference between 90 and 109 is substantial in real cognitive terms even though both fall under the "average" label. Someone scoring 109 is outperforming 73% of adults. Someone scoring 91 is outperforming 27%. Within this band, specific domain strengths can be highly meaningful for career and life outcomes even when the composite sits in the middle.

80–89 — Low Average (Bottom 10–25%)

Scores in this range indicate cognitive performance below the majority of adults but within the normal variation of the population. People in this range can manage most everyday life demands and many occupational roles, particularly those that are procedural or skill-based rather than analytically demanding. Academic performance at higher levels tends to require more effort and support. This range is not a clinical classification and does not imply any neurological condition.

70–79 — Borderline (Bottom 2–8%)

Scores in this range sit at the lower end of the normal distribution and approach the threshold where clinical assessment becomes relevant. A single test score here is not diagnostic — clinical assessment of intellectual disability requires comprehensive evaluation by a licensed psychologist across multiple domains over time. Test conditions, anxiety, and format familiarity significantly affect scores at this range.

Below 70 — Intellectual Disability Range

A score below 70 on a properly administered clinical instrument, combined with significant deficits in adaptive functioning, meets the criteria for intellectual disability diagnosis. An online screening test result below 70 is not a diagnosis and should not be interpreted as one. If you or someone you know scores consistently low on cognitive assessments, a full clinical evaluation by a licensed psychologist is the appropriate next step.

Important Caveats About This Chart

IQ ranges and their labels vary slightly between different testing frameworks and historical periods. The WAIS-IV system used here is the current clinical standard, but you will find slightly different terminology in older texts or alternative frameworks.

A single test score is always an estimate, not a precise measurement. Even clinical IQ tests have a standard error of measurement of approximately 3–5 points. Online tests have higher error. Your "true" IQ score is best understood as a range rather than a single number.

IQ measures a specific cluster of cognitive abilities. It does not capture creativity, emotional intelligence, practical wisdom, social skill, or the many other dimensions of human cognitive life that matter enormously for outcomes. High IQ is a useful tool. It is not a complete picture of anyone's mind.

Where Does the Average Person Actually Score?

The mean of 100 is not just a mathematical convention — it reflects the genuine centre of the adult population on these tasks. But "average" has become culturally loaded in a way that distorts how people interpret their scores. Being average on IQ does not mean being average at life, average at your career, or average as a human being. Some of the most consequential contributions to human culture and knowledge have come from people with thoroughly unremarkable test scores.

What IQ predicts most reliably is performance on tasks that resemble IQ tests — abstract reasoning under time pressure, novel problem solving, academic learning. For everything else, the other variables in your life matter more.