1. Logical Reasoning
Explore Test →Evaluates deductive logic, syllogisms, condition evaluation, and cause-and-effect reasoning under structured constraints.
IQ SCORE CHART
IQ Score Meaning & Chart
What a specific IQ score tells you: where it sits on the bell curve, its percentile, how rare it is, and which classification it falls into. New to the concept? Start with what is IQ.
Population Median
100
Global normative midpoint
Standard Deviation
±15
Wechsler standard deviation scale
Average Range
85–115
68.2% of global population
Interactive Psychometrics
The Normal Distribution (Bell Curve)
Drag the slider below to see where any IQ score falls on the standardized Gaussian distribution.
IQ 100
Percentile Rank
50th
Higher than 50% of people
Classification
Average
Normal cognitive baseline
Population Rarity
1 in 2
Represents 50% of the population
Psychometric Blueprint
The 5 Cognitive Domains Measured
Modern cognitive science assesses intelligence as a multifaceted profile rather than a single number:
2. Numerical Reasoning
Explore Test →Measures recognition of mathematical progressions, interleaved sequences, proportional relationships, and mental quantitative agility.
3. Spatial Reasoning
Explore Test →Mental 2D/3D rotation, folded paper projections, isometric cube block counting, and geometric perspective transformations.
4. Pattern Recognition
Explore Test →Raven-style progressive matrix solving, shape metamorphosis, and non-verbal logic. The purest empirical measure of fluid intelligence (g-factor).
5. Verbal Reasoning
Explore Test →Conceptual relationships between words, lexical analogies, contextual inference, and semantic classification.
Classification Scale
IQ Score Chart
Wechsler classification for deviation IQ scores (mean 100, SD 15). For more detail on each range, see the full IQ scale; to convert an exact score, use the percentile calculator.
| IQ Range | Classification | Percentile Equivalent | Population Share | Significance |
|---|---|---|---|---|
| 130+ | Very Superior | 98th+ | 2.2% | Mensa threshold |
| 120–129 | Superior | 91st–97th | 6.7% | Well above average |
| 110–119 | High Average | 75th–90th | 16.1% | Above average |
| 90–109 | Average | 25th–74th | 50% | Population average |
| 80–89 | Low Average | 9th–24th | 16.1% | Below average |
| 70–79 | Borderline | 2nd–8th | 6.7% | Support often helpful |
| <70 | Extremely Low | Below 2nd | 2.2% | Clinical evaluation advised |
Frequently Asked Questions
Common Questions About IQ Scores
What is considered a normal or average IQ score?
The population average is 100 with a standard deviation of 15. That means about 68% of people score between 85 and 115 (±1 SD), and about 95% score between 70 and 130. On the Wechsler scale, 90–109 is labelled "Average".
Can a person’s IQ score change over time?
Adult IQ is fairly stable relative to peers, but test performance can move by several points between sessions because of sleep, stress, health, practice with similar items and the test version used.
What is the highest possible IQ score on a standardized test?
Clinical tests like the WAIS-IV top out around 160 (4 standard deviations above the mean, roughly 1 in 30,000 people). Scores of 180 or 200 reported online are statistical extrapolations, not measurements.
Does a high IQ guarantee career or life success?
No. IQ predicts how quickly people learn abstract material and correlates with academic results, but real-world success also depends heavily on conscientiousness, motivation, social skills, health and opportunity.