IQ Score Ranges Explained: What Each Band Means

Try the free IQ-style visual reasoning test.

By MindScan Team · October 19, 2026

If you have ever seen a chart that says 90–109 is "average", 120–129 is "superior" and 130+ is "very superior", you have met an IQ score range table. These charts are everywhere online, and they are often shown without the context that makes them meaningful: which test the bands come from, why different tests use different labels, and how much uncertainty sits around any single score.

This guide walks through the common IQ score ranges, what each band means statistically, how bands differ between test publishers, and why a band is a description of performance on one test on one day rather than a verdict on a person.

This is educational reading. MindScan's IQ-style reasoning activity gives an estimated result for self-insight. It is not population-normed in the professional sense, it is not placed into any of the bands below, and it is not a diagnosis.

The short answer: the most common IQ score ranges

Most modern intelligence tests report a deviation IQ: a standard score where the average of the test's age-matched norming sample is set at 100 and one standard deviation is usually 15 points (some older scales used 16) (APA Dictionary: deviation IQ). On that scale, roughly two thirds of people score between 85 and 115, and more than 95% score between 70 and 130 (APA Dictionary: IQ).

The band labels most people have seen come from the Wechsler adult and preschool scales (WAIS–IV, WPPSI–IV). The percentages in the right-hand column are what a perfect bell curve with mean 100 and SD 15 predicts for each band, as listed in Wechsler's published classification tables (the theoretical figures from the WAIS–R manual) (IQ classification, Wikipedia):

IQ score range	Wechsler (WAIS–IV) label	Approx. share of people (theoretical)
130 and above	Very Superior	about 2.2%
120–129	Superior	about 6.7%
110–119	High Average	about 16.1%
90–109	Average	about 50%
80–89	Low Average	about 16.1%
70–79	Borderline	about 6.7%
69 and below	Extremely Low	about 2.2%

Two things stand out. First, the "Average" band is wide: it covers half of everyone. Second, the bands are symmetrical around 100, because the scale is built that way, not because nature arranged people into neat boxes of ten points.

What each band actually tells you

A band describes where a score sits compared with the norming sample for that particular test. It does not describe a fixed amount of "brainpower". Here is a plain-language reading of each range, with approximate percentiles calculated from the normal curve (mean 100, SD 15):

130 and above (about the top 2%). Performance two or more standard deviations above the sample mean. This is the region that high-ability societies use as a threshold: British Mensa, for example, requires a score in the top two percent on one of its supervised tests or accepted prior evidence (British Mensa).
120–129 (roughly the 91st to 97th percentile). Clearly above average on that test's tasks.
110–119 (roughly the 75th to 90th percentile). Above the middle of the distribution; many test families call this "High Average".
90–109 (roughly the 25th to 73rd percentile). The broad middle. A score of 95 and a score of 105 sit in the same band and, given measurement error, are often not meaningfully different.
80–89 (roughly the 9th to 23rd percentile). Below the middle on the tasks tested; many publishers call this "Low Average".
70–79 (roughly the 2nd to 8th percentile). Well below the sample mean on that test.
69 and below (about the bottom 2%). Two or more standard deviations below the mean. A score here is never, on its own, the basis for any conclusion about a person (more on that below).

A quick sanity check: IQ points are not marks out of 100 and not percentages. A score of 115 does not mean "15% cleverer than average". It means one standard deviation above the mean of that test's norms, which works out at about the 84th percentile.

Different tests, different labels

There is no universal naming scheme for IQ ranges. Each test publisher sets its own labels and, sometimes, its own boundaries, which is why psychologists are advised to report the label used by the specific test that was given (IQ classification, Wikipedia).

A few examples of how the same score region gets described:

Score region	WAIS–IV	WISC–V (children)	Kaufman KAIT	RIAS
130+	Very Superior	Extremely High	Upper Extreme	Significantly above average
120–129	Superior	Very High	Well Above Average	Moderately above average
70–79	Borderline	Very Low	Well Below Average	Moderately below average

Some publishers and newer editions use more neutral, descriptive wording. The children's WISC–V, for instance, uses "Very Low" where the WAIS–IV says "Borderline", and psychologists such as Groth-Marnat proposed alternatives like "well below average" and "upper extreme" so that labels describe performance rather than imply a medical judgement (IQ classification, Wikipedia). The Kaufman tests deliberately use symmetrical, non-evaluative names for the same reason.

Older charts that still circulate online sometimes use historical labels such as "genius" for scores above 140. That term was dropped from the Stanford–Binet classification as far back as its 1937 revision, and no modern test uses it as a score category (IQ classification, Wikipedia). If a website tells you your result is "genius level", that tells you more about the website than about you.

Why your score is really a range, not a point

Every professional intelligence test has measurement error. That is why a well-written assessment report gives a confidence interval around a composite score instead of presenting one exact number (IQ classification, Wikipedia, citing Sattler 2008).

Here is an illustration (made-up numbers, for explanation only). Imagine a report that gives a full-scale score of 118 with a confidence interval running from the low 110s to the low 120s. That person's "true" score plausibly sits anywhere in a span that crosses two Wechsler bands, High Average and Superior. Reading the label alone ("High Average") would hide that uncertainty.

Scores can also move between occasions and between tests. The same person may score a little differently on two well-made batteries because they emphasise different abilities (verbal reasoning, working memory, processing speed, visual puzzles) and were normed on different samples. Uncertainty also grows at the extremes: there are fewer people in the norming sample at very high or very low scores, so bands far from 100 are less precise than they look (IQ classification, Wikipedia).

The practical takeaway: treat the edges between bands as soft. 109 and 110 are not meaningfully different, even though a chart puts them in different boxes.

What IQ ranges can't tell you

They are not a diagnosis. A low score on its own does not establish a learning disability, and a high score does not establish giftedness. The NHS describes a learning disability in terms of how a person learns and manages everyday life (understanding complicated information, learning some skills, looking after themselves), not as a number on a test (NHS: Learning disabilities). In professional practice, adaptive functioning and other evidence sit alongside any test score, and the current US psychiatric manual (DSM-5) sets severity levels by adaptive functioning rather than IQ (IQ classification, Wikipedia).

They don't capture the whole person. IQ tests sample a handful of reasoning and processing tasks. They say little directly about creativity, persistence, practical skills, emotional insight or the particular strengths many neurodivergent people describe. For more on that broader picture, see our guide to understanding neurodivergence.

Labels can stick. This month an independent review in England into mental health conditions, ADHD and autism warned that diagnoses too often become labels that define people by their difficulties rather than their strengths and potential (BBC News, 9 October 2026). IQ bands are not diagnoses, but the same caution applies: a band name like "Low Average" or "Superior" is a shorthand for communication in a report, not a description of who someone is or what they will achieve.

Where free online scores fit

Many free online quizzes print a number that looks like a Wechsler IQ and then drop it into one of the bands above. Unless the provider documents a proper norming sample, standardised conditions and measurement error, that band is not meaningful in the way a professional report would be.

That is why MindScan does not assign IQ bands. Our free IQ-style reasoning test uses visual puzzles (matrices, rotations and sequences) and gives an estimated reasoning score on screen, with no email gate, for learning more about how you approach these puzzle types. It is not population-normed, it is not an official IQ score, and it should not be translated into a band, a percentile or an admission threshold.

If you want to practise first, our IQ-style sample questions with answers walk through worked examples. For more on the "100" at the centre of every chart, read Average IQ Score Explained. If you are curious about wider thinking traits and tendencies, try the free 20-question self-assessment or play a few rounds in the MindScan Arcade.

When a professional assessment makes sense

If a decision really depends on a score (educational support, a workplace adjustment, concerns about memory or learning, or applying to a high-ability society), a free online estimate isn't the right tool. In the UK:

For high-ability society membership, British Mensa runs supervised tests in person and online, and also accepts prior evidence such as an educational psychologist's report.
For a full cognitive assessment, such as the WAIS–IV UK, look for a practitioner psychologist on the HCPC Register or through the BPS Find a psychologist directory.
Where health, development or learning concerns are involved, your GP is a sensible first step.

FAQ

What is a normal IQ score range?

On most modern tests, about two thirds of people score between 85 and 115, and the Wechsler "Average" label covers 90–109 (APA Dictionary: IQ; IQ classification, Wikipedia).

What is a good IQ score?

There isn't a single "good" score. Above 110 is above the middle of the distribution and 130+ is roughly the top 2%, but a score's usefulness depends on the test, the conditions and the question you're trying to answer.

What IQ range is considered gifted?

There's no agreed definition of giftedness. In practice, many US school gifted programmes use a professionally assessed score of about 130 (roughly the top 2–3%) as a cut-off (IQ classification, Wikipedia).

Why do different charts show different IQ ranges?

Because each test publisher sets its own labels and boundaries, and some older scales used a standard deviation of 16 instead of 15. Always check which test a chart refers to.

Can my IQ range change?

Scores are fairly stable for many adults, but they can shift between occasions and between tests because of measurement error, different content, fatigue and practice. That's why professionals report a confidence interval.

Bottom line

IQ score ranges are a convenient way to describe where a score falls on one test's bell curve: about half of people in the 90–109 "Average" band, about 2% at each extreme. The labels vary by publisher, the edges are soft, and no band is a diagnosis or a summary of a person. Use the charts for understanding, not for labelling yourself or anyone else.

Sources

Start Free Assessment