What Does a 91 IQ Mean?
A 91 IQ is in the average range. About 27 in 100 people score lower than 91. Clinical reports using the WISC-V or the traditional WAIS-IV wording would call 91 Average.
- Percentile
- 27.43
- How rare
- 1 in 4 score 91 or lower
- WISC-V wording
- Average
- Traditional wording (WAIS-IV)
- Average
- Distance from 100
- 0.60 SD below
- On an SD 16 test
- about 90
- On an SD 24 test
- about 86
- Our test's usual range here
- 79 to 103 (90%)
What does a 91 IQ mean?
A score of 91 is 0.60 standard deviations below the average of 100. On most IQ tests one standard deviation, the typical distance from the average, is 15 points, so 91 is 9 points away.
91 sits near the bottom of the 90 to 109 band, 19 points below the next band up. About 49 in 100 people score from 90 to 109, the average band that holds 91.
What percentile is an IQ of 91?
A score of 91 is at the 27.43rd percentile. That percentile is the share of people who score lower than 91, not the share of questions right. Five points higher, 96 is at the 39.49th percentile. Five points lower, 86 is at the 17.53rd percentile. Across those ten points around 91, the percentile moves by 21.95.
How rare is an IQ of 91?
About 1 in 4 people score 91 or lower. In a town of 100,000 people, about 27,000 would score 91 or lower.
For every 100 people who score exactly 100, about 84 score exactly 91. These figures for 91 come from the normal curve that IQ scales are built on, and the IQ calculator works out any other score.
What would 91 be on other tests?
Not every test would print 91 for this position. Older Stanford-Binet forms and many school tests use a standard deviation of 16; there, the same position as 91 is about 90. On a scale with a standard deviation of 24, used by the Cattell test, it is about 86. 91, 90 and 86 all mean the same percentile.
Is 91 a good IQ score?
The scale does not grade the person behind a 91; it places one result among other people’s results. 91 is inside the average band, 90 to 109, where about half of all people score. What a 91 is useful for depends on the purpose, and a single online result is too rough for decisions about school, work or support. A 91 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 91 to the average?
91 is 9 points below the exact middle, 100. That gap is 0.60 of a standard deviation, which is small. Our average IQ guide explains why the middle stays at 100.
What does an online result of 91 mean?
An online result of 91 is an estimate. When our test shows 91, the estimated range next to it is usually about 79 to 103. That range for 91 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 91 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 91 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 91, take the free IQ test. It has 30 questions and shows an estimated range with every result.
Scores near 91
- 89 IQ: 2 points lower, at the 23.17th percentile.
- 90 IQ: 1 point lower, at the 25.25th percentile.
- 92 IQ: 1 point higher, at the 29.69th percentile.
- 93 IQ: 2 points higher, at the 32.04th percentile.
Look up any score from 70 to 160, not only those near 91, in the score explorer.
FAQ
What percentile is 91 IQ?
A score of 91 is at the 27.43rd percentile. That means about 27.43 percent of people score lower.
Is 91 IQ average?
Yes. 91 is inside the 90 to 109 band, where about half of all people score.
How many people have an IQ of 91?
On a whole-number scale, about 2.2 percent of people score exactly 91. About 1 in 4 people score 91 or lower.
Can an online test show 91?
Yes, as an estimate with a range: on our test a 91 usually comes with an estimated range of about 79 to 103.