What Does a 90 IQ Mean?
A 90 IQ is in the average range. About 25 in 100 people score lower than 90. Clinical reports using the WISC-V or the traditional WAIS-IV wording would call 90 Average.
- Percentile
- 25.25
- How rare
- 1 in 4 score 90 or lower
- WISC-V wording
- Average
- Traditional wording (WAIS-IV)
- Average
- Distance from 100
- 0.67 SD below
- On an SD 16 test
- about 89
- On an SD 24 test
- about 84
- Our test's usual range here
- 78 to 102 (90%)
What does a 90 IQ mean?
A score of 90 is 0.67 standard deviations below the average of 100. On most IQ tests one standard deviation, the typical distance from the average, is 15 points, so 90 is 10 points away.
90 sits near the bottom of the 90 to 109 band, 20 points below the next band up. About 49 in 100 people score from 90 to 109, the average band that holds 90.
What percentile is an IQ of 90?
A score of 90 is at the 25.25th percentile. That percentile is the share of people who score lower than 90, not the share of questions right. Five points higher, 95 is at the 36.94th percentile. Five points lower, 85 is at the 15.87th percentile. Across those ten points around 90, the percentile moves by 21.08.
How rare is an IQ of 90?
About 1 in 4 people score 90 or lower. In a town of 100,000 people, about 25,000 would score 90 or lower.
For every 100 people who score exactly 100, about 80 score exactly 90. These figures for 90 come from the normal curve that IQ scales are built on, and the IQ calculator works out any other score.
What would 90 be on other tests?
Not every test would print 90 for this position. Older Stanford-Binet forms and many school tests use a standard deviation of 16; there, the same position as 90 is about 89. On a scale with a standard deviation of 24, used by the Cattell test, it is about 84. 90, 89 and 84 all mean the same percentile.
Is 90 a good IQ score?
The scale does not grade the person behind a 90; it places one result among other people’s results. 90 is inside the average band, 90 to 109, where about half of all people score. What a 90 is useful for depends on the purpose, and a single online result is too rough for decisions about school, work or support. A 90 describes some kinds of reasoning on one test, on one day, and leaves out a great deal that matters, such as effort, knowledge and character.
How close is 90 to the average?
90 is 10 points below the exact middle, 100. That gap is 0.67 of a standard deviation, which is small. Our average IQ guide explains why the middle stays at 100.
What does an online result of 90 mean?
An online result of 90 is an estimate. When our test shows 90, the estimated range next to it is usually about 78 to 102. That range for 90 is provisional: it comes from our scoring model and a simulation, not yet from real test takers. Our methodology shows how the range is made.
An unsupervised online 90 may also run a little high: a large review found a gap of about 3 IQ points. Taking the same kind of test again usually raises a score like 90 a little, mostly on the first retakes. Our guide are IQ tests accurate covers this in depth.
To see where your own result falls next to 90, take the free IQ test. It has 30 questions and shows an estimated range with every result.
Scores near 90
- 88 IQ: 2 points lower, at the 21.19th percentile.
- 89 IQ: 1 point lower, at the 23.17th percentile.
- 91 IQ: 1 point higher, at the 27.43rd percentile.
- 92 IQ: 2 points higher, at the 29.69th percentile.
Look up any score from 70 to 160, not only those near 90, in the score explorer.
FAQ
What percentile is 90 IQ?
A score of 90 is at the 25.25th percentile. That means about 25.25 percent of people score lower.
Is 90 IQ average?
Yes. 90 is inside the 90 to 109 band, where about half of all people score.
How many people have an IQ of 90?
On a whole-number scale, about 2.1 percent of people score exactly 90. About 1 in 4 people score 90 or lower.
Can an online test show 90?
Yes, as an estimate with a range: on our test a 90 usually comes with an estimated range of about 78 to 102.