Physicists' IQ, Ranked: What Is Estimated, What Is Measured, What Is Myth

The ranking at a glance

The table orders physicists by the strength of the evidence, not by the size of the number. A scholarly estimate with a named method ranks above a single reported test score, which ranks above no evidence at all. Where no scholar has published a figure, we say so.

Why only Newton and Galileo have real estimates

Nearly every credible historical IQ traces to one book. In 1926 Catharine Cox, working in Lewis Terman's Genetic Studies of Genius program at Stanford, rated 301 eminent people born between 1450 and 1850. Cox, Terman and Maud Merrill read the biographical record of each and estimated the Stanford-Binet score that matched the subject's documented behavior, once for childhood to about 17 and once for ages 17 to 26. Cox then corrected the figures for the reliability of the record.

Newton's raw early-adult rating was 170; corrected, it became 190. Galileo's childhood rating fell in the 140 to 150 band, and his corrected early-adult figure is 185. Two other men who did major physics rated as high or higher: Blaise Pascal at 195 and Pierre-Simon Laplace at 190. Both are usually filed as mathematicians and appear in mathematicians ranked by IQ.

The window explains the gaps. Planck, born in 1858, missed it by eight years; Einstein, Curie, Bohr and the quantum generation missed it by decades. Archimedes predates it by more than 1,600 years. For the method and its limits, see historical IQ estimates explained, and for what the top figures imply, an IQ of 190 and an IQ of 185.

The one measured score: Feynman's 125

Richard Feynman, who shared the 1965 Nobel Prize in Physics, is the rare great physicist with a reported test result. His biographer James Gleick records that an IQ test in high school put him at 125: high, but in Gleick's phrase "merely respectable." Years later Feynman declined to join Mensa, saying his IQ was too low.

An IQ of 125 sits above about 95 percent of the population, roughly 1 person in 21. It is a real score from a real test, and it undercuts the assumption that the greatest physicists must have scored at the very top. A school test samples a narrow set of skills on a single day. It did not sample the ability to invent a new calculus of particle interactions.

The quantum generation: no scores, sharper evidence

For physicists born after 1850 the honest evidence is the documentary record, and its clearest single measure is how young they were when they did their defining work. The spread is wide, and it does not track any IQ list.

Three of these physicists did landmark work at 23. Planck and Galileo produced theirs in their forties, after decades of preparation. A retrospective IQ estimate built on the years before 26, as Cox's was, would have missed both of the late achievers' defining work entirely.

The numbers that fail: 160, 310 and the rest

Einstein, 160. There is no indication Einstein was ever tested, and Biography.com notes it is unclear what the figure is based on. It happens to equal the maximum score on the WAIS-IV, which suggests where it came from. Details: Albert Einstein's IQ.

Tesla, 310. On a modern scale with a standard deviation of 15, 310 lies 14 standard deviations above the mean. The expected number of people at that level, among everyone who has ever lived, is effectively zero. No modern test can produce such a score. See Nikola Tesla's IQ.

Hawking, 160. No test result was ever published. The figure repeats Einstein's myth. See Stephen Hawking's IQ.

Oppenheimer, 135 to 190. Six or more different numbers circulate, none sourced; one aggregator averages forum opinions. See Oppenheimer's IQ.

The common thread: each figure lacks a test, a date and a named estimator. A reader should demand all three.

What actually separates the greatest physicists

The physicists in this table are ranked by history on other grounds. Dirac predicted antimatter from the form of an equation, and Carl Anderson found the positron in 1932. Marie Curie won Nobel Prizes in two different sciences, physics in 1903 and chemistry in 1911. Heisenberg's uncertainty principle and Bohr's atom remain standard in introductory quantum courses. Galileo made measurement the core of physics.

Those achievements share traits a test samples poorly: persistence over years, judgment about which problem matters, and the nerve to trust a strange result. For rankings built on achievement rather than invented numbers, see the greatest physicists of all time and our physicist rankings. For the wider picture across fields, von Neumann's case is in John von Neumann's IQ and Marie Curie's in Marie Curie's IQ.

How this ranking was built

We included every physicist with a dedicated IQ page on this site and checked each against the published record. A figure counts as an estimate only if a named researcher produced it by a stated method; Cox's 1926 study is the only such source here. A figure counts as measured only if a reputable biography reports an actual test; Feynman's is the only one. Newton's and Galileo's figures were cross-checked against reproductions of Cox's tables. Everything else is marked "No scholarly estimate," however often a number is repeated online.

Editorial standard: IQ figures for historical figures are retrospective estimates and are labeled as such; scores for living people appear only when the person disclosed them or a reputable outlet reported them. Corrections: contact the editors.