Is an IQ of 90 good?
An IQ of 90 is average, just below the middle of the scale: higher than about 25% of people. Half of all people score between 90 and 109.
How rare is an IQ of 90?
In a room of 100 people, someone with an IQ of 90 would be smarter than 25 of them.
- Outscored: 25
- Would score higher: 75
More than half of all people score above 90. Here is how many would score higher in groups of different sizes:
| In a group of | People scoring above 90 |
|---|---|
| A classroom of 30 | about 22 |
| A room of 100 | about 75 |
| A school of 1,000 | about 750 |
| A town of 10,000 | about 7,500 |
| A packed football stadium (70,000) | about 52,000 |
| A city of 1 million | about 748,000 |
| The United States (about 340 million) | about 254 million |
What an IQ of 90 means
An IQ of 90 is 10 points below the average of 100, or 0.67 standard deviations below the mean. It falls in the average band.
Scores from 90 to 109 are the middle of the scale, where half of all people land. An average score means your reasoning is typical for your age: not a ceiling, just the center of the curve.
What an IQ score predicts, and what it doesn’t
IQ is one of the strongest single predictors of school grades: a meta-analysis of 240 samples put the correlation at about .54 (Roth et al., 2015). For job performance the estimate depends on the statistical corrections used: .51 in the classic review (Schmidt & Hunter, 1998) and .31 in a 2022 re-analysis (Sackett et al.). Either way, most of the differences between people come from other things: knowledge, effort, personality and opportunity.
How a 90 does on our test
On our free 30-question test, an IQ of 90 takes about 10 correct answers out of 30. Here is how 10 correct answers usually split across the four areas:
- Pattern reasoning 4 of 10
- Numerical reasoning 2 of 7
- Verbal reasoning 2 of 6
- Logical reasoning 2 of 7
Worked out from our scoring model, assuming the easier questions are the ones you get right. Harder questions count for more, so two people with the same number correct can score a few points apart. We’ll replace this with real results once enough people have taken the test. How scoring works
Jobs where the typical worker scored about 90
In a study that followed Wisconsin men from high school into their 50s, these job groups had a typical (median) score closest to 90. 0 of the 56 groups had a median below 90.
-
Janitors and church caretakers 91.5
Median 91.5. Middle half of workers 83 to 102. Middle 80% 73 to 111. -
Precision machine operators 93
Median 93. Middle half of workers 86 to 107. Middle 80% 76 to 116. -
Machine operators, other 93
Median 93. Middle half of workers 85 to 103. Middle 80% 76 to 113. -
Semi-skilled operatives, other 93
Median 93. Middle half of workers 85 to 102. Middle 80% 75 to 109. -
Truck drivers 93
Median 93. Middle half of workers 85 to 101. Middle 80% 76 to 109.
- Middle 80% of workers
- Middle half
- Median (the number on the right)
- IQ 90
Source: Hauser (2002), Wisconsin Longitudinal Study, Figure 12. The study covers men who finished high school in Wisconsin in 1957 and their brothers, with IQ measured in high school (Henmon-Nelson test, group average 102) and jobs held in 1992–94. Groups with fewer than 30 people are left out, and people who left school early aren’t in the study, so low scores are under-represented. Every job spans a wide range: 27 to 42 points between its 10th and 90th percentile.
IQ 90 on other scales
Not every test uses the same scale. The same performance that earns 90 on a modern test with a standard deviation of 15 produces a different number on tests with a wider spread:
| Scale | Spread | Equivalent |
|---|---|---|
| Standard IQ (Wechsler, Stanford-Binet 5) | SD 15 | 90 |
| Older Stanford-Binet and some online tests | SD 16 | 89 |
| Cattell Culture Fair | SD 24 | 84 |
| z-score | mean 0, SD 1 | -0.67 |
| T-score | mean 50, SD 10 | 43 |
| Stanine | 1 to 9 | 4 |
| Percentile | 0 to 100 | 25th |
Scores near 90
| IQ | Percentile | Score higher | Band |
|---|---|---|---|
| 85 | 16 | Over half | Low average |
| 86 | 18 | Over half | Low average |
| 87 | 19 | Over half | Low average |
| 88 | 21 | Over half | Low average |
| 89 | 23 | Over half | Low average |
| 90 | 25 | Over half | Average |
| 91 | 27 | Over half | Average |
| 92 | 30 | Over half | Average |
| 93 | 32 | Over half | Average |
| 94 | 34 | Over half | Average |
| 95 | 37 | Over half | Average |
Wondering where most people land? See what the average IQ is, or every band on the IQ scale.
Do you really score 90?
Take the free 30-question IQ test: about 15 minutes, with an instant score, your percentile and your own room of 100 to share. No email, no paywall.
Take the free IQ testIQ 90: common questions
Is 90 a genius IQ?
No. “Genius” is usually used for scores of 140 or more. An IQ of 90 is average.
Is an IQ of 90 gifted?
It is below the usual gifted cut-off of about 130. Many gifted programs also look at achievement, creativity and teacher ratings, not just IQ.
Can you join Mensa with an IQ of 90?
Not on its own. Mensa requires a top-2% score on an approved, supervised test, which is 130 or more on the standard scale.
Can an online test tell me if my IQ is 90?
It can give you an estimate, not a clinical score. Ours uses question types from established reasoning tests and a statistical scoring model, but it has not been checked against a professional IQ test. Even professional tests report a range of several points around a score.
By the MyIQTest team · Reviewed November 2026 · Figures assume the standard scale (mean 100, SD 15). Methodology