What does an IQ of 128 mean?
An IQ of 128 is higher than about 97% of people. Roughly 1 in 30 people score 128 or above.
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Where 128 sits on the bell curve
IQ scores follow a bell curve with an average of 100 and a standard deviation of 15. The shaded area shows the 97% of people who score below 128.
What the "Very high" range means
Scores from 120 to 129 sit well above average, higher than about 9 in 10 people. People in this range usually pick up complex, abstract material quickly.
In a room of 100 people, about 3 would score 128 or higher.
Careers that often suit an IQ around 128
Based on how complex each job is. Your strongest reasoning area (abstract, numerical or verbal) changes the picture a lot, and the full test report matches careers to your own strengths.
How exact is a single score?
No test measures IQ to the exact point. A score of 128 on a short test is best read as a range of roughly 123 to 133. That's why the report on this site gives a confidence band as well as a score.
Nearby scores
| IQ | Higher than | Range |
|---|---|---|
| 122 | 92% | Very high |
| 124 | 94% | Very high |
| 126 | 96% | Very high |
| 130 | 98% | Extremely high |
| 132 | 98% | Extremely high |
| 134 | 99% | Extremely high |
Questions people ask
Is 128 a good IQ score?
Yes. An IQ of 128 is above average, higher than about 97% of people.
What percentile is an IQ of 128?
An IQ of 128 is at about the 97th percentile: it is higher than roughly 97% of the population.
How rare is an IQ of 128?
About 1 in 30 people score 128 or higher.
Can my IQ score change?
Scores on any single test vary by a few points from day to day because of sleep, focus and familiarity with the question types. Underlying reasoning ability is fairly stable in adults, but a single result should always be read as a range rather than an exact number.
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