An IQ of 108 falls squarely in the “Average” range, which spans from 90 to 109 on the most widely used intelligence scales. It sits at roughly the 70th percentile, meaning you scored higher than about 70% of the population. It’s a solid, comfortably above-the-midpoint score, but it doesn’t place you in a separate classification from someone who scored 100.
Where 108 Falls on the Scale
IQ scores follow a bell curve centered at 100, with a standard deviation of 15 points. About two-thirds of all adults score between 85 and 115, and 95% fall between 70 and 130. A score of 108 is just over half a standard deviation above the mean, putting you in the upper portion of the average range but not yet in the “High Average” category, which starts at 110 on the Wechsler scales.
To put the percentile in context: if you were in a room of 100 randomly selected people, roughly 30 would have scored the same or higher, and about 70 would have scored lower. That’s a meaningful edge over the midpoint, but it’s also well within the broad middle band of human cognitive ability.
Your Score Is a Range, Not a Fixed Number
No IQ test measures ability down to a single point. The standard margin of error is generally considered to be about five points in either direction. That means a measured score of 108 reflects a true score likely somewhere between 103 and 113. You could be sitting right at the population average or you could be solidly in the High Average range. This is one reason psychologists discourage reading too much into the specific number and focus instead on the broader classification.
What 108 Means for School and Work
In a large study tracking Wisconsin high school graduates across their careers, the average IQ for first jobs was about 101, and a score of 108 landed between the median and the 75th percentile of working adults. That places you comfortably in the middle-to-upper range of the workforce, overlapping with people in a wide variety of occupations. The spread of IQ scores within any given occupation is surprisingly large. Across jobs ranging from a mean IQ of about 92 to nearly 119, the variation within each job barely narrowed, meaning people with an IQ of 108 are found in nearly every field.
The relationship between IQ and career success is also more nuanced than most people assume. Research from that same longitudinal study found that IQ’s effect on occupational attainment, earnings, and wealth is almost entirely explained by how much education a person completes. Among people with the same level of schooling, IQ had little independent influence on job performance or income. The main way cognitive ability shapes a career is by influencing high school grades, which in turn affect whether someone finishes college. In other words, what you do with your ability matters far more than the number itself.
What IQ Tests Actually Measure
IQ tests assess a specific set of cognitive skills: working memory, processing speed, pattern recognition, verbal reasoning, and spatial problem-solving. They are reasonably good at predicting academic performance and moderately useful for predicting work success. But they capture only a slice of what most people mean by “intelligence.”
As researchers at Yale and Princeton have pointed out, IQ tests measure brain power but not the inclination to use it well. They don’t assess your ability to critically evaluate information, override gut-level biases that lead to bad decisions, or think rationally when the stakes are high. They also miss social intelligence, creativity, self-awareness, and practical problem-solving skills that don’t show up on timed tests. Harvard psychologist Howard Gardner has argued for decades that cognitive ability is better understood as multiple intelligences spanning mathematical, verbal, spatial, social, and other domains.
The distinction matters in everyday life. Someone with a high IQ can still make poor financial decisions or fall for misinformation, while someone with a modest score can excel through disciplined thinking and strong interpersonal skills. IQ tells you something real about certain cognitive capacities, but it leaves out a lot.
Why the Number Can Shift
IQ scores aren’t perfectly stable across your lifetime. Adolescents aged 16 to 17 tend to average around 108, while 18- to 19-year-olds average closer to 105, reflecting natural fluctuations during development. Factors like sleep, stress, familiarity with test formats, and even which specific test you take can nudge your score a few points in either direction. If you took the same test again next month, you’d likely get a similar but not identical result.
This is another reason to treat 108 as a general indicator rather than a precise measurement. It tells you that your reasoning and problem-solving abilities, as captured by this particular type of test on this particular day, are solidly average and slightly above the population midpoint. It doesn’t define your ceiling for learning, earning, or accomplishing what matters to you.