What Does an IQ of 105 Mean?

An IQ of 105 is at the 63.1st percentile: it is higher than about 63.1% of people of the same age, and about 1 in 2.7 people scores 105 or higher. On the WAIS-IV it is classed as Average. Like every IQ score it is an estimate with a margin of error of several points, and it predicts outcomes only on average.

IQ 105 percentile and how it is calculated

IQ tests are scaled so that scores follow an approximately normal distribution with a mean of 100 and a standard deviation (SD) of 15. A score of 105 is 0.33 standard deviations above the mean (z = +0.333). Plugging that into the normal cumulative distribution function gives a percentile of 63.1. Put simply: in a representative group of 1,000 people of your age, about 369 would score 105 or higher.

Some reports use a slightly different convention — for example the percentage of people scoring strictly below 105, or a value read from the test’s own norm tables rather than the ideal curve — so you may see a percentile a fraction of a point different. The full list for every score from 55 to 160 is in our IQ percentile chart.

How 105 compares with nearby scores

Is 105 a good IQ score?

Yes, it is a solid average score, slightly above the middle. See also what counts as a good IQ score.

How rare is a 105 IQ?

On the normal model, about 1 in 2.7 people scores 105 or higher. That is about 369,441 per million people, or roughly 18,472,100 people in a country of 50 million. Rarity grows quickly in the tails: each extra 5 points above 100 multiplies the rarity, which is why the step from 105 to 110 (1 in 2.7 → 1 in 4.0) is bigger than the step from 100 to 105.

105 IQ classification

Different tests use different descriptive words for the same number. For a full-scale score of 105:

These labels describe where a score falls relative to peers; they are not diagnoses. Newer reports, such as the WAIS-5 sample report, use plainer wording (“Average”, “Above average”, “Very high”). See all bands in IQ score ranges and classification.

What an IQ of 105 means in practice

An IQ of 105 sits at the 63rd percentile: higher than about 63 people in 100. It is solidly within the Average band (90–109), one-third of a standard deviation above the mean, and statistically very close to 100 — a 95% confidence band would span roughly 99 to 111.

Scores in the low 100s are where you most often see “uneven” profiles: a high verbal score balanced by a lower processing-speed score, or vice versa. Two people with an identical 105 can have very different strengths, which is why psychologists report index scores (verbal comprehension, visual-spatial, fluid reasoning, working memory, processing speed) as well as the full-scale IQ.

There is nothing about 105 that limits education or career choice. In the UK occupational study summarised below, the estimated averages for most professional groups were around 109–114, and with spreads of about 13 points, a large share of people in those professions score at or below 105.

105 IQ jobs, education and life outcomes: what research says

Large meta-analyses agree that IQ predicts educational and occupational outcomes on average, with plenty of individual exceptions. Strenze (2007), pooling longitudinal studies, found corrected correlations of about .56 between intelligence and education, .43 with occupational level and .20 with income. For job performance, Schmidt and Hunter (1998) estimated a validity of about .51 for general mental ability; a 2022 re-analysis by Sackett and colleagues revised it to about .31, still useful but leaving most differences in performance to other factors such as experience, conscientiousness and job knowledge.

How does 105 look against real occupations? The table uses Wolfram’s (2023) estimates from the UK Understanding Society survey and assumes a typical spread of about 13 points inside each occupation (the study found only about a quarter of IQ variance lies between occupations). It shows how many people in each group would be expected to score below 105 — a reminder of how much occupations overlap.

Read more in average IQ by occupation. These are group estimates from a short test battery, not entry requirements.

Measurement error: how precise is a score of 105?

A full-length clinical test such as the WAIS-IV or WAIS-5 has very high reliability (internal consistency around .97–.98 for the full-scale IQ), which still leaves a standard error of measurement (SEM) of about 2–3 points; Pearson’s WAIS-5 sample report lists an FSIQ SEM of 3.00. A 95% confidence interval is roughly ±1.96 SEM, so a measured 105 is best read as about 99 to 111. Shorter tests have larger errors (SEM 4–5 or more), widening the band to roughly 96–114.

Extreme scores also tend to move toward the mean on re-testing (regression to the mean). With a reliability of .96, the best estimate of the “true” score behind an observed 105 is about 104.8, which is why many reports centre the confidence interval slightly below the obtained score.

What an IQ of 105 does not tell you

• Index scores (verbal, spatial, reasoning, memory, speed) can differ widely behind the same full-scale number.
• It does not fix the future: correlations of .2 to .6 leave room for very different outcomes among people with the same score.
• It cannot be compared across very different tests or eras without adjusting for norms.
• It does not measure creativity, practical wisdom, emotional skills, motivation or character.
• It is a sample of performance on one day; sleep, stress, language and familiarity with tests all affect it.

The Flynn effect and old norms

IQ is always relative to a norm group, and norm groups age. Because average raw performance rose by roughly 3 points per decade for much of the 20th century (Flynn effect; Trahan et al., 2014), an outdated test makes everyone look better. Scored on norms 15 years old, a 105 might correspond to about 100 on fresh norms. Gains have slowed and even reversed in some countries such as Norway (Bratsberg & Rogeberg, 2018), so the size of the effect is not fixed.

Online IQ tests and a score of 105

If your 105 came from a website or app, it may be off by 10 points or more. Unproctored tests, unknown norms, practice effects and flattering scoring are all common. Our own free IQ test is explicitly a rough estimate for fun; for a real number see the assessment section below and our article on online IQ tests.

How to get a proper IQ assessment

A valid IQ score comes from an individually administered, standardized test (for example the WAIS-5/WAIS-IV for adults, WISC-V for children, or Stanford-Binet 5) given by a licensed or registered psychologist. Expect 60–120 minutes of testing, a written report with index scores and confidence intervals, and a fee that varies by country and provider. Schools, university disability services, and clinical or neuropsychology services can refer you. Ask which test and which norms were used, and for the confidence interval, not just the single number.