Estimate your Intelligence Quotient (IQ) score and understand what it means for your cognitive abilities.
IQ (Intelligence Quotient) is a score derived from standardized tests designed to measure human intelligence. The average IQ score is 100, with most people (about 68%) scoring between 85 and 115.
IQ = (Mental Age ÷ Chronological Age) × 100
Modern IQ tests use deviation IQ scoring where 100 is the average and the standard deviation is 15 points.
| IQ Range | Classification | Percentile | Prevalence |
|---|---|---|---|
| 130+ | Very Superior (Genius) | 98th+ | 2.2% |
| 120-129 | Superior | 91st-97th | 6.7% |
| 110-119 | High Average | 75th-90th | 16.1% |
| 90-109 | Average | 25th-74th | 50% |
| 80-89 | Low Average | 9th-24th | 16.1% |
| 70-79 | Borderline | 3rd-8th | 6.7% |
| Below 70 | Extremely Low | Below 3rd | 2.2% |
Note: IQ tests measure specific cognitive abilities, not overall worth or potential. Many factors contribute to success beyond IQ scores.
Modern IQ tests typically assess several cognitive domains:
Vocabulary, verbal reasoning, and knowledge of world information. Measures ability to understand and express verbal concepts.
Non-verbal problem solving, spatial processing, and visual-motor integration. Assesses ability to interpret and organize visual information.
Ability to hold and manipulate information in mind. Measures attention, concentration, and mental control.
How quickly one can perform simple cognitive tasks. Assesses visual scanning and decision speed.
| Person | Estimated IQ | Notable Achievement |
|---|---|---|
| Albert Einstein | 160-190 | Theoretical physicist, developed theory of relativity |
| Stephen Hawking | 160 | Theoretical physicist, work on black holes |
| Marie Curie | 180-200 | Nobel Prize in Physics and Chemistry |
| Leonardo da Vinci | 180-220 | Polymath, artist, inventor |
| Judit Polgár | 170 | Chess grandmaster, strongest female player in history |
A: Yes, especially during childhood and adolescence. Brain development, education, and life experiences can cause IQ scores to increase or decrease by 10-20 points. Adult IQ scores tend to be more stable.
A: This calculator provides an estimate only. Professional IQ tests administered by psychologists are more comprehensive and accurate, typically taking 2-3 hours with multiple question types.
A: IQ measures cognitive abilities while EQ (Emotional Quotient) measures emotional intelligence - the ability to recognize, understand, and manage emotions in oneself and others.
A: While innate cognitive capacity has limits, you can improve performance on IQ tests through practice, education, and brain-training exercises. Healthy lifestyle choices also support optimal cognitive function.
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