Alan Turing's IQ: 170
Estimated IQ
170
Known For
Father of computer science, WWII codebreaker, artificial intelligence
About Alan Turing
Alan Turing is the founder of theoretical computer science and artificial intelligence — his 1936 paper introducing the concept of a universal computing machine (the Turing machine) established the mathematical foundations of computation before any electronic computer existed. During World War II, he led the team at Bletchley Park that cracked the German Enigma cipher, an achievement credited by historians with shortening the war by two to four years and saving millions of lives. His 1950 paper Computing Machinery and Intelligence, which proposed the Turing Test as a criterion for machine intelligence, launched the philosophical foundations of AI research. His estimated IQ of 170 reflects his extraordinary capacity for abstract mathematical reasoning and his ability to work at the frontier of entirely new intellectual territory.
What an IQ of 170 Means
Turing's IQ estimate of 170 places him well into the exceptionally gifted range, though some researchers suggest his specific mathematical and logical reasoning abilities may have been higher. What is distinctive about Turing's cognitive profile is his ability to operate simultaneously at the most abstract theoretical level — proving fundamental theorems about computability — and the most practical engineering level, designing and building real codebreaking machines under wartime conditions. His personal life was tragically shaped by the criminalization of his homosexuality: he was prosecuted for 'gross indecency' in 1952 and subjected to chemical castration. He died at forty-one of cyanide poisoning, officially ruled a suicide, though recent scholarship raises questions about this conclusion. A royal pardon was issued in 2013 — more than sixty years after his death.
How Alan Turing Compares
To understand where this falls on the IQ scale, see our complete IQ score ranges guide, or learn what IQ actually measures.
Famous IQ Comparison
| Person | Estimated IQ | Known For |
|---|---|---|
| Alan Turing | 170 | Father of computer science, WWII codebreaker, artificial intelligence |
| Christopher Langan | 195–210 | Highest recorded living IQ, Cognitive-Theoretic Model of the Universe |
| Srinivasa Ramanujan | 185 | Self-taught mathematical genius, number theory, infinite series |
| Carl Sagan | 140 | Astronomer, science communicator, Cosmos TV series, Pale Blue Dot |
| Carl Friedrich Gauss | 180–190 | Prince of Mathematics, contributions across all of mathematics |
| Noam Chomsky | 150 | Linguist, cognitive scientist, political philosopher, universal grammar |
| Gottfried Wilhelm Leibniz | 182–205 | Co-inventor of calculus, philosopher, polymath |
See the complete famous IQ list or check what an IQ of 170 means.
Where This Estimate Comes From
- Documented academic record at King's College Cambridge and a Princeton PhD
- Documented foundational work in computability and WWII codebreaking at Bletchley Park
- No publicly verified test result
Estimate disclaimer: Alan Turing's IQ figure is a speculative estimate compiled from public sources, not a verified test result. See how we compile these estimates.
Frequently Asked Questions
What was Alan Turing's IQ?
Alan Turing's IQ is estimated at approximately 170, placing him in the top 0.003% of the population. He never took a standardized IQ test in a format comparable to modern assessments. This estimate reflects the extraordinary abstractness of his foundational work in computability theory — establishing what can and cannot be computed by any algorithm — and his applied genius at Bletchley Park, where he cracked codes that had defeated the combined efforts of Britain's best mathematicians.
How did Turing crack the Enigma code?
Turing's key insight was that the Germans' Enigma machine, despite its staggering complexity (capable of more than 158 quintillion configurations), had a structural weakness: it could never encrypt a letter as itself. This constraint, combined with predictable German message conventions (weather reports always starting with 'Wetter,' military messages containing standard phrases), allowed Turing to design the Bombe — an electromechanical device that exploited these regularities to systematically eliminate impossible settings. The Bombe did not 'crack' Enigma in a single stroke but reduced an astronomically large search space to a manageable one, allowing daily codebreaking before messages expired at midnight.
What is the Turing Test?
The Turing Test, proposed in Turing's 1950 paper, is a criterion for machine intelligence: a human interrogator conducts text conversations with both a human and a computer, without knowing which is which. If the interrogator cannot reliably distinguish the computer from the human, the computer is said to have passed the test and demonstrated intelligence. Turing proposed this as an operationally meaningful substitute for the philosophically thorny question 'Can machines think?' The test has been enormously influential in AI research and philosophy of mind, though many philosophers and AI researchers now regard it as neither necessary nor sufficient for genuine intelligence.
More Science Figures
Explore More Famous IQs
Take our free IQ test to discover your own score, or explore what an IQ of 170 means.
MyIQScores Editorial Team
Researchers in cognitive psychology, psychometrics & educational science
Last updated
May 10, 2026
All content on MyIQScores is reviewed for scientific accuracy against peer-reviewed research in cognitive psychology and psychometrics. Our editorial team cross-references each article with published literature before publication and updates pages whenever new research warrants a revision.