Common score and percentile reference points
Modern IQ scores describe performance relative to an age-based norm group. On a commonly used scale, 100 is near the 50th percentile, 115 near the 84th, 120 near the 91st, and 130 near the 98th. These are approximate values from a normal model rather than universal cutoffs.
Publishers and organizations use different descriptions. Terms such as above average, superior, very high, or gifted may have different boundaries, so the report and its technical manual take priority.
- 110–119: above the population mean
- 120–129: well above average on many scales
- 130 and above: approximately the upper two percent on a mean-100, SD-15 model
A high composite can contain an uneven profile
A total score combines selected abilities. Someone may perform especially strongly in verbal reasoning, visual reasoning, working memory, or processing speed while another area is closer to their age-group average.
The profile, testing conditions, language, education, health, and reason for assessment can matter more than a single label. A high score does not prescribe personality, creativity, motivation, or future achievement.
Precision and responsible interpretation
Every score has measurement uncertainty. Professional reports commonly include a confidence interval because a result of 129 is not meaningfully separated from 130 by a perfectly precise boundary.
Use online results as indicative feedback. Decisions about education, clinical support, or eligibility should rely on an appropriate supervised instrument and qualified interpretation.
Common questions
Frequently asked questions
Is an IQ of 120 considered high?
It is around the 91st percentile on a mean-100, SD-15 model and is commonly described as well above average, but labels vary by test.
Does a high IQ guarantee success?
No. Achievement also depends on knowledge, motivation, health, personality, opportunity, persistence, and the environment.
References