What Was Stephen Hawking's IQ? And Why He Refused to Say
Stephen Hawking's IQ is generally estimated at around 160 — the same figure attached to Einstein, and for similar reasons: for a physicist who reshaped our understanding of black holes and time, a score at the ceiling of standard tests feels about right. But no confirmed score exists, and Hawking himself made sure of that. When The New York Times asked him directly in 2004, "What is your IQ?", his answer became legendary:
"I have no idea. People who boast about their IQ are losers."
That one line is the real story of Hawking and intelligence testing. In this article: where the 160 estimate comes from, whether his achievements back it up, and what his own view of IQ tells us about measuring genius.
Hawking's IQ: What We Actually Know
| Question | Answer |
|---|---|
| Commonly cited IQ | ~160 (estimate) |
| Confirmed test score | None — no public record exists |
| His own answer (2004) | "I have no idea. People who boast about their IQ are losers." |
| Did he think in numbers? | Increasingly no — ALS forced him to compute geometrically, in his head |
The 160 figure follows the same logic as historical-genius estimates: psychologists have long assigned scores to extraordinary minds based on documented achievements rather than test sheets. By that biographical yardstick, Hawking sits comfortably in the 160 range — the top 0.003% of the population. Whether he would have bothered to sit the test is another question entirely.
Ready to discover your IQ?
Take our scientifically designed test and get your score in just a few minutes.
The Achievements Behind the Estimate
The estimate isn't generosity. Hawking's track record reads like a checklist for "smarter than the instrument can measure":
| Evidence | Why it matters |
|---|---|
| First-class honours at Oxford | By his own admission he studied about 1,000 hours in three years — roughly an hour a day — and still finished top-tier |
| Hawking radiation (1974) | Combined quantum mechanics and general relativity to show black holes emit radiation — a result so counterintuitive it stunned the field |
| Lucasian Professor of Mathematics | Held Newton's own chair at Cambridge for 30 years |
| A Brief History of Time (1988) | Explained cosmology to tens of millions; stayed on the Sunday Times bestseller list for over 4 years |
There's a famous story from his Oxford final exams. His marks sat on the borderline between first- and second-class honours, so the examiners interviewed him. Hawking told them: "If you award me a First, I will go to Cambridge to do my PhD. If I receive a Second, I shall stay in Oxford. So I expect you will give me a First." They did.
Where 160 Sits on the Scale — and Where You Would
As with Einstein, it helps to see what the estimated number actually means. IQ follows a bell curve centered on 100:
| IQ score | How many people reach it |
|---|---|
| 100 | 1 in 2 |
| 130 | 1 in 44 — the usual Mensa cutoff |
| 145 | 1 in 741 |
| 160 | ~1 in 31,000 — the ceiling of most standard tests |
Hawking's estimated level is measurable territory for almost nobody — but everything below it is measurable for everybody. His point in the famous quote wasn't that intelligence doesn't exist; it was that talking about your score is not the same as doing something with the mind behind it.
Ready to discover your IQ?
Take our scientifically designed test and get your score in just a few minutes.
The Mind That Worked Without Hands
Here's the part of Hawking's story that no IQ estimate captures. Diagnosed with ALS at 21 and given about two years to live, he progressively lost the ability to write — which, for a theoretical physicist, means losing the ability to work through pages of equations. Most physicists think on paper. Hawking couldn't.
So he adapted in a way colleagues consistently described as almost superhuman:
- He learned to perform long chains of calculation entirely in his head, holding intermediate results in memory for hours or days.
- He retrained his intuition toward geometry and mental imagery — rotating shapes, surfaces, and spacetime diagrams mentally instead of manipulating symbols.
- Kip Thorne, the Nobel-winning physicist who knew him for decades, compared his mental toolkit to Mozart composing an entire symphony in his head.
In cognitive terms, this is an extreme feat of working memory and spatial reasoning — the same faculties IQ tests probe with pattern puzzles, just operating at a scale no test can reach. The disease that took his body arguably showcased his mind more clearly than any score could have.
Hawking vs. Einstein: Who Was Smarter?
Both men end up with the same folklore number — 160 — which mostly proves how little the number distinguishes minds at that altitude. A more honest comparison looks at what they did:
| Einstein | Hawking | |
|---|---|---|
| Signature achievement | Relativity — rewrote space and time | Hawking radiation — made black holes obey thermodynamics |
| Commonly cited IQ | 160–190 (estimate) | ~160 (estimate) |
| Ever tested? | No | No public record |
| View on IQ | Never engaged with it | "People who boast about their IQ are losers" |
The symmetry is telling: the two most famous "IQ 160" holders in history never took the test. The numbers were awarded to them by public imagination — a way of putting a familiar scale on unfamiliar brilliance.
Frequently Asked Questions
Q: What was Stephen Hawking's IQ?
A: Around 160 is the commonly cited estimate. No confirmed score exists — Hawking never published one and claimed not to know it. The estimate rests on his scientific achievements, which comfortably support a score at the ceiling of standard tests.
Q: Did Stephen Hawking ever take an IQ test?
A: There is no public record of one. When asked his IQ directly in a 2004 New York Times interview, he answered, "I have no idea. People who boast about their IQ are losers."
Q: Was Stephen Hawking smarter than Einstein?
A: There's no meaningful way to rank them. Both are assigned the same estimated 160 by popular culture, and neither ever took a test. Their achievements are different in kind: Einstein rebuilt the foundations of physics; Hawking produced its most celebrated result about black holes.
Q: How rare is an IQ of 160?
A: About 1 in 31,000 people — the 99.997th percentile, and the ceiling of most professional tests like the WAIS. Scores beyond that point can't be reliably distinguished by standard instruments.
References
- The New York Times (2004) — The Science of Second-Guessing (Hawking interview)
- Nature (2018) — Stephen Hawking obituary
- Britannica — Stephen Hawking
- American Psychological Association — Intelligence
Last updated: July 6, 2026
✨Related Articles
What Was Albert Einstein's IQ? The Truth Behind the Famous Number
Albert Einstein's IQ is commonly estimated at around 160. He never took a test, but his achievements make the number plausible. Here's the full story.
Optical Illusions IQ Test - Can Visual Puzzles Measure Intelligence?
Can optical illusions measure your IQ? Explore the science behind visual puzzles and how perception, pattern recognition, and the brain relate to intelligence.
Mensa IQ Test - How to Join, Test Format, and Preparation Tips 2026
Everything about the Mensa IQ test: how to join, test format, preparation strategies, costs, and what membership offers. Complete guide for 2026.