Famous People & IQ
IQ of Famous People and Celebrities: Real Scores vs Myths
Which famous IQ scores are real? We traced Kasparov, Newton, Goethe, Hawking and more back to their sources: tested scores, 1926 estimates and pure myth.
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Guides to IQ, clearly explained
What IQ scores mean, how IQ tests work and how far to trust them, plus practice questions with answers. Written in plain English and checked against reliable sources.
Featured articles
Famous People & IQ
What Is Elon Musk's IQ? The 155 Claim Checked
Elon Musk's IQ is quoted as 155, yet no test result has ever been published. His SAT score, his record and why the estimates disagree by 31 points.
Famous People & IQ
What Was Einstein's IQ? The Truth Behind the 160 Myth
Einstein's IQ is quoted as 160, 180 or even 200, yet he never took an IQ test. Here is where the numbers came from and what the record really shows.
IQ Scores & Results
IQ Scale and IQ Score Range Chart, Explained
Every IQ score range from average to genius, the normal IQ range, a bell curve you can explore and a full percentile chart.
Practice & Tips
Sample IQ Test Questions with Answers
Twelve practice questions in pattern, logic, spatial and number reasoning, each with a step-by-step answer.
IQ Tests Explained
Are Online IQ Tests Accurate?
How online IQ tests differ from professional ones, the signs of a trustworthy test and what your result can really tell you.
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Look up any IQ score
Type a score from 55 to 180 to see its percentile, how rare it is and what it means.
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Famous People & IQ · 13 min read
IQ of Famous People and Celebrities: Real Scores vs Myths
Which famous IQ scores are real? We traced Kasparov, Newton, Goethe, Hawking and more back to their sources: tested scores, 1926 estimates and pure myth.
Famous People & IQ · 10 min read
The Highest IQ in the World: Who Really Holds the Record?
The famous record claims of 228, 250 and 230 traced to their sources, and how high a real IQ can go, with a rarity calculator.
Famous People & IQ · 12 min read
What Was Isaac Newton's IQ? Where the 190 Comes From
Newton's famous 190 is real, but it is not a test score: it is a 1926 estimate made from biographies. How it was worked out, and what his record shows.
Famous People & IQ · 12 min read
What Is Terence Tao's IQ? Where the 230 Really Comes From
Tao's famous IQ of 220 to 230 comes from a test he took at 6. What it showed, why he says "greater than 175" is more realistic, and his record.
Famous People & IQ · 11 min read
What Was Nikola Tesla's IQ? The 160 and 310 Claims Checked
Tesla never took an IQ test. Where the 160 and 310 figures come from, which tests existed in his lifetime, and what his record shows.
Famous People & IQ · 12 min read
What Is Bill Gates' IQ? The 160 Claim and His SAT Checked
Bill Gates' IQ is put at 160, but it comes from his 1590 SAT, not an IQ test. Why that can't give a number, and the maths paper that says more.
Famous People & IQ · 10 min read
What Is Elon Musk's IQ? The 155 Claim Checked
Elon Musk's IQ is quoted as 155, yet no test result has ever been published. His SAT score, his record and why the estimates disagree by 31 points.
Famous People & IQ · 12 min read
Garry Kasparov's IQ: The Real Test Scores
Kasparov is one of the few famous people with a real IQ result: 135 and 123 on two tests in 1987. Why the scores differ and where the myth of 190 came from.
Famous People & IQ · 11 min read
What Was Stephen Hawking's IQ? The 160 Claim vs the Facts
Stephen Hawking's IQ is usually given as 160, but he never published a score and said he had no idea. Where the number came from and what his life shows.
Practice & Tips · 15 min read
IQ Test for Kids: Free Puzzle Test for Ages 6 to 12
A free reasoning test for children aged 6 to 12, with puzzles for each age on patterns, shapes, logic and numbers, every answer explained and nothing saved.
IQ Tests Explained · 11 min read
IQ Testing for Children: A Parent's Guide
Which IQ tests children take, from the WISC-V to school tests like the CogAT and CAT4, how to get a child tested and how to read the scores.
Practice & Tips · 5 min read
Photographic Memory Test: Free 5-Round Challenge
Test your memory in five rounds: a scene, a grid, numbers, a chessboard and words. Choose Relaxed, Standard or Kasparov mode and get your memory profile.
Understanding IQ · 11 min read
Photographic Memory: Is It Real? Eidetic Memory Explained
What science says about photographic memory, eidetic memory and hyperthymesia, the real people with extraordinary memories, and how to train your own.
Understanding IQ · 11 min read
Hyperthymesia: The People Who Remember Every Day of Their Lives
What hyperthymesia (HSAM) is, the signs, how researchers test for it and what happens in the brain, with a 5 dates challenge to try.
Famous People & IQ · 11 min read
What Was Einstein's IQ? The Truth Behind the 160 Myth
Einstein's IQ is quoted as 160, 180 or even 200, yet he never took an IQ test. Here is where the numbers came from and what the record really shows.
IQ Scores & Results · 10 min read
IQ Scale and IQ Score Range Chart, Explained
Every IQ score range from average to genius, the normal IQ range, a bell curve you can explore and a full percentile chart.
Practice & Tips · 15 min read
Sample IQ Test Questions with Answers
Twelve practice questions in pattern, logic, spatial and number reasoning, each with a step-by-step answer.
IQ Tests Explained · 9 min read
Are Online IQ Tests Accurate?
How online IQ tests differ from professional ones, the signs of a trustworthy test and what your result can really tell you.
IQ Scores & Results · 8 min read
IQ Standard Deviation Explained: Why 15, and What About 16 or 24?
What a standard deviation is, how it is worked out, why IQ uses 15 while some tests use 16 or 24, with a converter between the scales.
IQ Scores & Results · 12 min read
IQ by Profession: Average IQ by Job, From the Original Studies
Average test scores for 227 jobs from US Army data, modern Swedish figures for doctors, lawyers and CEOs, and why the spread inside every job matters more than its average.
IQ Scores & Results · 11 min read
SAT to IQ: Conversion Chart and Estimator
Estimate the IQ that goes with an SAT score from College Board percentiles, see the full conversion chart, and what research says about the SAT and IQ correlation.
Understanding IQ · 13 min read
Is Intelligence Hereditary? Genes, Twins and IQ
What twin, family, adoption and DNA studies show about how much of IQ is genetic, what heritability really means, and why "intelligence comes from your mother" is a myth.
Understanding IQ · 13 min read
Can You Increase Your IQ? What the Evidence Says
What has really raised IQ scores, from schooling to adoption, why gains from early programmes fade, and why brain-training apps, Mozart and supplements fall short.
IQ Scores & Results · 6 min read
IQ Percentile Calculator: Percentile, Rarity and Score for Any IQ
A free IQ calculator: turn any score into a percentile and rarity, find the IQ for any percentile, or see what share of people score between two numbers.
IQ Scores & Results · 12 min read
IQ by Country and Continent: Every Country Compared
National IQ estimates for 207 countries side by side with World Bank test scores, averages by continent, and an honest look at how reliable the figures are.
IQ Scores & Results · 10 min read
What Is a Good IQ Score? The Benchmarks That Matter
What 110, 120 and 130 really mean, the Mensa and gifted-programme benchmarks, what a higher score does and doesn't predict, and a checker for your own score.
IQ Scores & Results · 8 min read
Average IQ: What Is Normal, by Age and Over Time
Why the average IQ is 100, what counts as a normal score, how averages work across ages and how they have risen over time.
IQ Tests Explained · 9 min read
The Wechsler IQ Test (WAIS) Explained: Subtests and Scores
What happens in the WAIS-5, the most widely used adult IQ test: its ten main subtests, five index scores and how the scores are worked out.
Understanding IQ · 11 min read
Fluid vs Crystallized Intelligence: Differences and Examples
What fluid and crystallized intelligence are, everyday examples of each, when each one peaks with age, how IQ tests measure them and whether you can improve them.
Understanding IQ · 11 min read
Abstract Reasoning: What It Is, Examples and Tests
What abstract reasoning means, how it differs from concrete thinking, where it happens in the brain, how tests measure it, and four Set A or Set B puzzles to try.
Understanding IQ · 11 min read
Spatial Reasoning and Spatial Intelligence Explained
What spatial reasoning and spatial intelligence are, the main kinds of spatial skill, why they matter for STEM, how they are tested, and a mental rotation experiment to try.
Understanding IQ · 11 min read
Verbal Reasoning and Verbal IQ: Meaning, Tests and Examples
What verbal reasoning and verbal IQ mean, how the Verbal Comprehension Index works, how 11+, UCAT, GRE and job tests use verbal reasoning, and practice questions.
Understanding IQ · 12 min read
Processing Speed: What It Is and How It Is Measured
What processing speed is, what the Processing Speed Index on IQ tests measures, what a low score means, and a symbol coding task and reaction time test to try.
Practice & Tips · 10 min read
Pattern Recognition Test: 12 Free Questions with Answers
A free 12-question pattern recognition test with number series, letter series, matrices and figure puzzles, plus what pattern recognition says about intelligence.
Understanding IQ · 9 min read
What Is IQ? What It Measures and What It Doesn't
What IQ stands for, what an IQ test actually measures, what scores can and can't predict, and how much IQ can change.
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Image credits: Elon Musk sketch adapted from a photo by Gage Skidmore, CC BY-SA 4.0. Einstein sketch based on a public-domain photograph by Ferdinand Schmutzer. Nikola Tesla sketch based on a public-domain photograph by Napoleon Sarony, about 1890. Bill Gates sketch based on a public-domain 2018 photograph by the U.S. Department of Health and Human Services. Isaac Newton sketch based on the public-domain 1689 portrait by Godfrey Kneller. Terence Tao sketch adapted from a photo by Gert-Martin Greuel, Oberwolfach Photo Collection, CC BY-SA 2.0 DE. Garry Kasparov sketch based on a photo © European Union, 2026, CC BY 4.0. Stephen Hawking sketch based on a photo by Jim Campbell/Aero-News Network, CC BY 3.0.