What is Brian Cox’s IQ?
A D in school maths, and a number nobody can source.
Brian Cox failed to distinguish himself in school mathematics, by his own account, then built a career in particle physics anyway. The 183 attached to him online traces to neither event.
Brian Cox’s estimated IQ
- A first-class BSc in Physics from the University of Manchester (1995), after a documented D grade in A-level Mathematics.
- A PhD in high-energy particle physics (1998), researching diffractive scattering on the H1 experiment at DESY, Hamburg.
- Elected a Fellow of the Royal Society in 2016; awarded the OBE (2010) and CBE (2020) for services to science.
- Currently Professor of Particle Physics at Manchester and the Royal Society Research Professor for Public Engagement in Science.
A completed physics PhD and an FRS are strong, checkable achievement markers, but they are not a test result. This range reflects the qualifications, not a measured score — and Cox has never published or claimed one.
- Born
- 3 March 1968, Oldham, England
- Field
- Particle physics
- Education
- BSc (first-class), PhD, University of Manchester
- Known for
- ATLAS experiment research; BBC science documentaries; FRS
What an IQ of 125–140 actually means
Set the claim aside for a moment. If someone genuinely scored in this range, here is what that would represent.
Average is 100 by construction, and about two-thirds of people fall between 85 and 115. Take the test to place your own score on this scale.
| Score range | Classification | Share of people | What it indicates |
|---|---|---|---|
| 85 – 114 | Average | ~68% | The range most people fall into. |
| 115 – 129 | Above average | ~13.6% | Roughly one person in seven. |
| 130 – 144 | Gifted | ~2% | The threshold most high-IQ societies use. |
| Above 144 | Highly gifted | ~0.1% | Figures above this range are extrapolated from the curve rather than measured. |
Percentages are approximate and describe a normal distribution. The same number means different things on tests with different standard deviations.
Thirty questions gives you a measured position on this exact scale — your score, your percentile and the ability breakdown behind it.
Find out in 30 minutes →Who Brian Cox is
Brian Cox was born in Oldham in 1968. Before turning to physics, he played keyboards for the rock band Dare, then for D:Ream, whose 1994 single “Things Can Only Get Better” reached number one in the UK.
He read Physics at the University of Manchester, graduating with first-class honours in 1995, and completed a PhD in high-energy particle physics there in 1998, working on the H1 experiment at the DESY accelerator in Hamburg. He later joined the ATLAS experiment at CERN’s Large Hadron Collider.
Since the mid-2000s he has presented numerous BBC science documentaries, including Wonders of the Solar System and Wonders of the Universe, alongside his academic post at Manchester.
By Elora Mercer, Celebrity Research WriterFigures checked by Leon Falkner, Data & Research AnalystReviewed by Aarav Vardhan, Editor-in-Chief · Last reviewed August 2026
Brian Cox: the documented record
The estimate above rests on this record. Every entry here is a matter of public fact, which is more than can be said for the number itself.
- 1968Born in Oldham, England.
- 1985Reportedly receives a D grade in A-level Mathematics.
- 1994D:Ream’s “Things Can Only Get Better” reaches UK number one.
- 1995Graduates Manchester with a first-class BSc in Physics.
- 1998Completes a PhD in particle physics at Manchester.
- 2010Awarded the OBE.
- 2016Elected a Fellow of the Royal Society.
- 2020Awarded the CBE.
Where the 183 figure came from
Following a claim back to its first appearance is the part almost nobody does — and it is what most people are actually asking.
Cox’s own telling of his school maths grade is the more interesting fact here, and it is real: by his account he devoted his A-level years to his band rather than his studies, and it shows in the result. What is missing from the popular version of the story is that a D grade did not stop a first-class physics degree years later — it simply meant he arrived at university by a less direct route than most physicists.
The gap between the D grade and the eventual FRS is the actual story this page can document. An invented 183 flattens that into a single, static number and removes the part that is true and unusual: a real, later change of direction backed up by a completed doctorate.
Compare this with Richard Feynman, whose page covers a documented school-administered test score that most retellings also get wrong, in the opposite direction.
How we read a number →Confirms 2016 election, professorship and honours.
Widely reported in profile interviews; treated here as a documented personal account rather than an official record, since no school transcript is public.
On diffractive dissociation at large momentum transfer, H1 experiment, DESY.
No interview, biography or Royal Society material gives a tested score for Cox.
No original source could be located; appears to originate on social media.
The sources behind our estimate
The figures that circulate for Brian Cox, what we were able to confirm, and where the two diverge.
An IQ of 183 circulates in social posts and fan pages about Brian Cox.
No profile, interview or Royal Society page mentions an IQ figure for Brian Cox. The 183 appears to originate on social media rather than any biographical source, and several people repeating it note that it sits oddly next to his own account of a weak school maths grade.
A single unsourced number, repeated without a citation, is not evidence of anything except that it is easy to share.
Want a number that does hold up? Every figure on this page is somebody’s claim. Take the 30-question test and get a percentile you can check rather than a figure you have to trust.
Brian Cox — frequently asked
What is Brian Cox’s IQ?
No test result has ever been published for him. The 183 that circulates online has no traceable source.
Did Brian Cox really get a D in A-level Maths?
By his own account, yes — he has said he focused on his band rather than his studies during that period.
How did he become a physicist after a weak maths grade?
He returned to education at Manchester, earning a first-class Physics degree in 1995 and a particle-physics PhD in 1998 — years after the A-level result.
Is Brian Cox a real Fellow of the Royal Society?
Yes, elected in 2016, one of the higher-bar credentials in UK science.
Is this the actor Brian Cox?
No. This page is about the English particle physicist and broadcaster, not the Scottish actor of the same name.
Why does this page give a range instead of the 183 figure?
Because 183 has no source. The 125–140 range instead reflects his documented, checkable academic and research record.
How does my IQ compare with Brian Cox?
You can find out in about fifteen minutes. The IQ Metrics assessment is 30 questions, scored on the same 100-mean scale used throughout this page, so your result and the estimate above are at least expressed in the same units — one measured, one inferred. Once you have a number, the leaderboard shows where it would sit, and how we score and norm it explains the benchmarking.
Where does this estimate come from?
From the documented record rather than a test — the method is named above and set out in full under how we read a number. Compare it against the other scientists profiles, starting with Albert Einstein.
- Take the 30-question IQ test — get a measured score and percentile of your own
- Average IQ by country — how the scale behaves across populations
- How IQ Metrics scores its assessment — the method behind our own number
- More on how IQ testing works — reliability, error and what a score can and cannot say
- More scientists profiles — same field, same method
More scientists
Photograph by Maryland GovPics, CC BY 2.0. Background removed for the portrait above. · Photograph from the US National Archives (catalog 558579), public domain. · Photograph by Elliott & Fry, public domain. Background removed for the portrait above.
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An estimate is an inference.
Yours can be measured.
Thirty questions, scored against general-population benchmarks. Your score, your percentile, your ability breakdown and a printable IIF certificate.
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