What Does a 105 IQ Mean?.
IQ scores are scaled, not counted. The number 105 has meaning only because the scale is built so that 100 is the population average and every 15 points is one standard deviation - the natural spread of human scores. So 105 is not "105 out of something"; it is a position: a small step above the middle of the distribution.
A 105 IQ score
On the standard IQ scale (mean 100, standard deviation 15), a score of 105 is one third of a standard deviation above the mean (z = +0.33). It corresponds to roughly the 63rd percentile, which means about 37 percent of people - around 1 in 3 - score 105 or higher. It falls within the "Average" classification band (roughly 90 to 109), placing it just above the midpoint of the scale. It is a measure of reasoning performance relative to the population, not a fixed or complete description of a person.
This page explains exactly where 105 sits, what it reliably tells you, what it does not, and the single most important caveat that most "what does X IQ mean" pages skip: the answer depends on what kind of test produced the number. A score of 105 is slightly above average and squarely normal - common, unremarkable in the literal sense, and nothing to read as a deficit.
Where 105 sits: the percentile and the rarity
Because IQ scores follow an approximately normal (bell-curve) distribution, position and rarity are fixed by the math. A score of 105 is at about the 63rd percentile, meaning you scored higher than roughly 63 percent of the reference population. Put the other way round, about 37 percent of people - around 1 in 3 - score 105 or higher, so it is a common result that sits comfortably inside the broad middle of the curve.
For reference points on the same scale: 100 is the 50th percentile (the exact middle), 105 is about the 63rd (slightly above average), 115 is about the 84th (1 in 6), and 130 is about the 98th (1 in 50). Because 105 is so close to the dense center of the bell curve, it is not a rare position - it is a modest, ordinary step up from the average.
What a 105 actually predicts
General cognitive ability is the single best-evidenced psychological predictor of academic achievement and job performance, and the relationships are strongest in complex, knowledge-heavy domains. A score around 105 is associated, on average, with a solid, slightly-above-typical capacity to learn and reason across the everyday range of educational and working life.
The phrase "on average" is doing real work, though. These are population-level statistical relationships, not verdicts about an individual. People who score near 105 succeed in demanding fields all the time, because consequential achievement draws heavily on conscientiousness, opportunity, skill, and persistence - traits a reasoning test does not measure. A slightly-above-average score opens no special doors and closes none; it simply places your measured reasoning a little above the middle of the human range.
What 105 does NOT mean
IQ measures reasoning ability, not worth, character, creativity, wisdom, or success. A score of 105 is normal and common, and it says nothing about your value as a person. It is weakly related at best to many things people assume it governs: emotional skill, practical judgment, ethical behavior, and the ability to get along with others are largely separate dimensions, several of which we measure with different instruments.
A slightly-above-average score is also not a ceiling, a disappointment, or a personality. It describes how you performed on reasoning tasks relative to others, on the day you tested, on the test you took - nothing more. Reading "just above average" as either "elite" or "not enough" overreads a number that simply marks a small, ordinary step up from the midpoint of the scale.
- Not a measure of worth, character, or potential as a person
- Not the same as creativity, wisdom, or emotional intelligence
- Not a deficit or a disappointment - it is a normal, common, slightly-above-average result
- Not a fixed lifelong certificate - scores have measurement error and can shift
The caveat that changes everything: which test?
A 105 from an individually administered, professionally supervised test (such as the WAIS or Stanford-Binet) and a 105 from a quick online quiz are not the same evidence. Supervised tests have rigorous norms, controlled conditions, and validated items; many online tests have none of these and adjust scores to keep users happy.
This is why honest online tests, including ours, cap scores (we cap at 160) and report a band with a percentile rather than a false-precision point. If you saw 105 on an unsupervised test, read it as "likely a little above average" rather than as a certified figure - the sensible way to read any online result is as a band, not a certified point.
Also relevant: See a sample IQ report
Frequently asked questions
Is a 105 IQ good?
A 105 IQ is slightly above average - it sits at roughly the 63rd percentile and still falls inside the "Average" band (roughly 90 to 109). "Average" here means normal and typical, not poor: a result this close to the center of the scale describes a large share of people. It opens no special doors and closes none, because achievement depends on far more than a reasoning score.
What percentile is a 105 IQ?
About the 63rd percentile - you scored higher than roughly 63 percent of the population. This follows from the scale: 105 is one third of a standard deviation above the mean of 100 (z = +0.33), which places it just above the midpoint of the distribution.
How common is a 105 IQ?
Common - about 37 percent of people, or roughly 1 in 3, score 105 or higher, and a slightly larger share score at or below it. Because 105 sits close to the dense center of the bell curve, a score around this level is an ordinary, frequent result rather than a rare one.
Is there a meaningful difference between 100 and 105?
Not much in practice. A 5-point gap is well within the measurement error of a typical IQ test, so two people scoring 100 and 105 are statistically very close and a retest could easily swap them. Both fall in the same "Average" band, and the difference is far too small to predict anything meaningful about an individual.
References
- Deary, I. J. (2012). Intelligence. Annual Review of Psychology, 63, 453-482.
- Schmidt, F. L., & Hunter, J. E. (2004). General mental ability in the world of work: Occupational attainment and job performance. Journal of Personality and Social Psychology, 86(1), 162-173.
- Neisser, U., Boodoo, G., Bouchard, T. J., et al. (1996). Intelligence: Knowns and unknowns. American Psychologist, 51(2), 77-101.
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