Daniel Tammet
Where 150 Falls on the IQ Scale
What Is Daniel Tammet's IQ?
Daniel Tammet's IQ is estimated at approximately 150, placing them in the Genius range. Daniel Paul Tammet is an English writer and savant. His memoir, Born on a Blue Day (2006), is about his early life with Asperger syndrome and savant syndrome, and was named a "Best Book for Young Adults" in 2008 by the American Library Association's Young Adult Library Services magazine.
For context, an IQ of 150 would put Daniel Tammet in approximately the 99.957th percentile of the global population. The average IQ is 100, and a score above 130 is generally considered "gifted," while 145+ is typically classified as genius-level.
Evidence Behind the Estimate
Unlike some figures with formally disclosed IQ scores, most celebrity IQ estimates are compiled from academic records, biographical accounts, performance data, and expert analysis. Estimated
- Demonstrated exceptional intellectual capabilities at an unusually early age
- Documented IQ testing shows results far beyond standard norms
- Academic achievements that would be remarkable at any age were accomplished as a child
- Mastered complex domains (mathematics, language, music) years ahead of peers
- Continues to be studied by researchers in gifted education and developmental psychology
How Does Daniel Tammet Compare?
With an estimated IQ of 150, Daniel Tammet falls into the Genius classification. Scores in this range are found in roughly the top 2–5% of the population and are associated with exceptional academic and professional achievement.
What Does This IQ Score Mean?
Psychologists generally agree that IQ captures a meaningful slice of cognitive ability — particularly in areas like abstract reasoning, pattern recognition, and verbal comprehension — but it's far from a complete picture. Many researchers emphasize that above a threshold of around 120–130, raw intelligence increasingly gives way to creativity, grit, emotional intelligence, and circumstance as determinants of real-world success.
Daniel Tammet's accomplishments in prodigies suggest a cognitive profile that pairs well with their estimated IQ — demonstrating not just raw intellectual firepower, but the drive and focus to convert it into meaningful output.