Loading calculator…
Loading calculator…
Estimate your Intelligence Quotient (IQ) with standardized psychometric models (Wechsler SD 15, Stanford-Binet SD 16), play our endless AI-generated logic brain game, and unlock cognitive neuroplasticity insights.
Powered by FinCalc Bharat AI Engine
Synthesize a personalized clinical neuro-psychometric breakdown analyzing your domain competencies, potential cognitive biases, and recommended daily brain exercises.
66
Mean = 100, Standard Deviation (SD) = 15
Standardized cognitive assessments measure general intelligence quotient (the psychological g-factor) across multiple domains, including matrix pattern analysis, working memory, arithmetic deduction, and verbal logic. Below is the international clinical benchmark comparison across major psychometric scales.
| Wechsler (SD 15) | Stanford-Binet (SD 16) | Percentile Range | Diagnostic Classification | Mensa Eligibility |
|---|---|---|---|---|
| 130 and above | 132 and above | Top 2.2% (98th - 99.9th) | Very Superior / Gifted | Qualified |
| 120 - 129 | 121 - 131 | 91st - 97th percentile | Superior | Non-qualifying |
| 110 - 119 | 111 - 120 | 75th - 90th percentile | High Average | Non-qualifying |
| 90 - 109 | 90 - 110 | 25th - 74th percentile | Average / Normal | Non-qualifying |
| 80 - 89 | 80 - 89 | 9th - 24th percentile | Low Average | Non-qualifying |
| 70 - 79 | 70 - 79 | 2nd - 8th percentile | Borderline | Non-qualifying |
Created by French psychologist Alfred Binet and formalized by Lewis Terman at Stanford University, the classical formula directly compares mental age against chronological age:
Limitation: Ratio IQ works well for childhood development up to age 16, but fails for adults because mental age plateaus in maturity while chronological age continually increases.
Introduced by David Wechsler in 1939, modern clinical psychometrics compares test performance against an age-normed peer group using Gaussian normal distribution:
Advantage: A score of 100 always represents the exact median performance of one's peers, maintaining consistent percentile meanings across all adult age groups.
Modern cognitive science builds on over a century of clinical research:
Reviewed by FinCalc Bharat · Last updated: October 2026.
The Endless AI Brain Game uses FinCalc Bharat's AI Engine to dynamically construct novel mathematical sequences, spatial rotation puzzles, linguistic analogies, and matrix patterns calibrated to your chosen difficulty level (Novice, Pro/Mensa, or Genius). Because questions are synthesized in real-time, the game never repeats the exact same puzzle.
In modern standardized psychometrics (such as the Wechsler Adult Intelligence Scale WAIS-IV and Stanford-Binet), the population mean is mathematically set to 100 with a standard deviation of 15. An IQ score between 90 and 109 is classified as 'Average / Normal', encompassing approximately 50% of the human population. Scores above 120 are considered Superior, while 130 or higher represents the top 2.2% of the population.
Originally, Alfred Binet and Lewis Terman calculated 'Ratio IQ' with the formula: IQ = (Mental Age / Chronological Age) * 100. For instance, an 8-year-old child exhibiting the problem-solving abilities of a 10-year-old scored (10 / 8) * 100 = 125. Modern clinical psychology replaced this with 'Deviation IQ' introduced by David Wechsler, which compares an individual's raw performance against a Gaussian bell curve normal distribution for their age group, using mean 100 and standard deviation 15.
Mensa accepts individuals who score in the top 2% (98th percentile or higher) of the general population on a standardized supervised intelligence test. On the Wechsler WAIS scale (SD 15), this corresponds to an IQ of 130 or above. On the Stanford-Binet scale (SD 16), the cutoff is 132. On the Cattell Culture Fair scale (SD 24), the requirement is 148.
The Flynn Effect refers to the substantial and long-sustained increase in both fluid and crystallized intelligence test scores measured across many parts of the world from roughly 1930 to the early 2000s (averaging ~3 IQ points per decade). Because IQ test norms are periodically recalibrated to reset the average to 100, an IQ of 100 today represents higher raw cognitive performance than an IQ of 100 eighty years ago.
The AI Cognitive Profile is powered by FinCalc Bharat's AI Engine. Your scores and age are processed securely without requiring any personal identification, registration, or credentials. No personal data is tracked or stored.
No. While this standardized test utilizes classic psychometric sequences (pattern matrices, arithmetic logic, verbal analogies, and spatial rotation) calibrated to Wechsler norms, official clinical IQ diagnoses require comprehensive, multi-hour proctored assessments administered by licensed clinical psychologists (such as WAIS-IV, WISC-V, or Woodcock-Johnson batteries).