What is Hannah Fry’s IQ?
Hannah Fry holds a University College London PhD in fluid dynamics and is Cambridge’s first Professor of the Public Understanding of Mathematics.
No IQ score has been published for Hannah Fry, so Hannah Fry’s IQ is unknown as of November 2026. No IQ test result, school assessment or adult score appears in any biography or institutional profile of her. What is documented is a University College London doctorate completed in 2011 and a professorship at the University of Cambridge since January 2025.
Hannah Fry’s estimated IQ
- A mathematics degree and a PhD from University College London, with a 2011 thesis titled A Study of Droplet Deformation, supervised by Frank T. Smith, per Wikipedia and the thesis citation it gives.
- A lectureship at University College London in 2012, later senior lecturer and then professor in the Mathematics of Cities at the UCL Centre for Advanced Spatial Analysis, per Wikipedia.
- The 2019 Royal Institution Christmas Lectures, which the Royal Institution lists as her lecture series for that year, and the Christopher Zeeman Medal (2018) and Royal Society David Attenborough Award (2024), per Wikipedia.
- Appointment in January 2025 as the University of Cambridge’s first Professor of the Public Understanding of Mathematics, per the Faculty of Mathematics at Cambridge.
This is an inference from a record, not a test result. A doctorate and a professorship show sustained mathematical ability, but the prizes she holds reward explaining mathematics to the public, which is a different skill from the reasoning an IQ test samples.
- Born
- February 21, 1984, Harlow, Essex, England
- Education
- University College London: mathematics degree and PhD (2011), fluid dynamics
- Doctoral thesis
- A Study of Droplet Deformation (2011), supervisor Frank T. Smith
- Current post
- Professor of the Public Understanding of Mathematics, University of Cambridge, since January 2025
- Earlier post
- Professor in the Mathematics of Cities, UCL Centre for Advanced Spatial Analysis
- Known for
- Royal Institution Christmas Lectures 2019; Hello World (2018); BBC series; The Rest Is Science podcast
- Awards
- Zeeman Medal (2018), Asimov Prize (2020), David Attenborough Award (2024)
- Circulating figure
- None found; no published IQ test result
What an IQ of 135–150 actually means
Set the claim aside for a moment. If someone genuinely scored in this range, here is what that would represent.
| 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 Hannah Fry is
Is Hannah Fry a mathematician? Yes: she holds a PhD in fluid dynamics and is a professor of mathematics. Hannah Mary Fry was born in Harlow, Essex, on February 21, 1984, according to Wikipedia, and grew up in Hoddesdon and Ware, Hertfordshire. She attended Presdales School in Ware, where, Wikipedia says, a teacher inspired her to study mathematics.
She took a degree in mathematics at University College London (UCL). In 2011 she completed a PhD there under Frank T. Smith, on fluid dynamics and the Navier–Stokes equations; the thesis is cited as A Study of Droplet Deformation (2011). In 2012 she became a lecturer at UCL in the Centre for Advanced Spatial Analysis, and was later made senior lecturer and then professor in the Mathematics of Cities, according to Wikipedia. Her research there concerned patterns in human behavior, particularly in cities, according to the Royal Institution.
What has Hannah Fry written and presented? Her books include The Mathematics of Love and The Indisputable Existence of Santa Claus (both 2015) and Hello World: How to Be Human in the Age of the Machine (2018), shortlisted for the Baillie Gifford Prize and the Royal Society Book Prize, per the Royal Institution. In 2021 she co-wrote Rutherford and Fry’s Complete Guide to Absolutely Everything (Abridged) with Adam Rutherford. On television she presented a BBC Four film on Ada Lovelace in 2016, The Joy of Data, and the BBC series The Secret Genius of Modern Life.
She gave the Royal Institution Christmas Lectures in 2019, titled Secrets and lies, and Wikipedia describes her as only the fourth mathematician to deliver them. She received the Christopher Zeeman Medal in 2018, the Asimov Prize in 2020 for Hello World, an honorary fellowship of the Royal Academy of Engineering in 2022 and the Royal Society’s David Attenborough Award in 2024. She was president of the Institute of Mathematics and its Applications in 2024. In January 2025 she joined the Department of Applied Mathematics and Theoretical Physics at Cambridge as its first Professor of the Public Understanding of Mathematics. Since November 2025 she has hosted the podcast The Rest Is Science with Michael Stevens, per Wikipedia. For her age at the time of each milestone, see the age-at-breakthrough study; to see where you stand yourself, try the IQ Metrics test.
By Elora Mercer, Celebrity Research WriterFigures checked by Leon Falkner, Data & Research AnalystReviewed by Aarav Vardhan, Editor-in-Chief · Last reviewed November 2026
_(cropped_3).jpg){kind=link}
Hannah Fry: 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.
- 1984Born February 21 in Harlow, Essex.
- 2011Completes her PhD at University College London; thesis A Study of Droplet Deformation.
- 2012Appointed lecturer at UCL, in the Centre for Advanced Spatial Analysis.
- 2016Presents a BBC Four film on Ada Lovelace and begins co-presenting Curious Cases on BBC Radio 4.
- 2018Publishes Hello World; receives the Christopher Zeeman Medal.
- 2019Delivers the Royal Institution Christmas Lectures, Secrets and lies.
- 2020Co-presents The Great British Intelligence Test on BBC Two; wins the Asimov Prize.
- 2022Honorary fellowship of the Royal Academy of Engineering.
- 2024Receives the Royal Society David Attenborough Award; becomes president of the Institute of Mathematics and its Applications.
- 2025Joins the University of Cambridge in January as Professor of the Public Understanding of Mathematics.
Why no figure circulates
Following a claim back to its first appearance is the part almost nobody does — and it is what most people are actually asking.
No IQ test result has been published for Hannah Fry, so there is no sourced Hannah Fry IQ score to audit. A figure attached to her name without a named test, a date and an examiner is a guess, however often it is repeated.
Her Wikipedia biography, the Royal Institution’s profile of her as its 2019 Christmas Lecturer and the Faculty of Mathematics at the University of Cambridge describe degrees, posts and programs, and none gives an IQ. For how such numbers spread, and what to check first, see where celebrity IQ numbers come from.
Did Hannah Fry take an IQ test on television? She co-presented The Great British Intelligence Test on BBC Two in 2020, but the program described a large online experiment run with Imperial College London on the brainpower of the public. It reported results for groups of participants, not for its presenters, and it is not a source for any score of hers.
Is Hannah Fry a genius? Her documented record is that of a research mathematician who became the country’s best-known explainer of mathematics. The Royal Society’s 2024 David Attenborough Award citation, as quoted by Wikipedia, calls her “the foremost populariser of maths in the country.” That describes reach and skill, not a score. “Genius” has no fixed cut-off; see what genius-level IQ means.
How smart is Hannah Fry compared with other science communicators on this site? Her estimated IQ of 135–150 overlaps from 135 to 140 with Brian Cox (125–140), who also holds a completed doctorate and is a university professor. It sits slightly above Mark Rober (130–145), and below Michio Kaku (150–165), a theoretical physicist with decades of research. See also other scientists we have checked.
On the usual scale (mean 100, SD 15), a score around 140 is about 1 in 261 people; 135 is about 1 in 100 and 150 about 1 in 2,300. Because this range rests on a doctorate and a career rather than a test, both of its ends are judgments, not measurements.
How we read a number →No school, university or adult IQ result for Fry is public. Her Wikipedia biography, the Royal Institution’s profile and the Cambridge Faculty of Mathematics pages describe degrees, posts and programs, and none gives an IQ. A web search for her name with “IQ” turned up only pages about a BBC program that tested the public.
Source for her birth date and place, education at UCL, the 2011 PhD under Frank T. Smith (thesis A Study of Droplet Deformation), UCL posts from 2012, books, television, honors, the 2024 Attenborough Award citation and the 2025 Cambridge professorship. Load-bearing details are confirmed against the Royal Institution and Cambridge pages where possible.
Calls her the 2019 Christmas Lecturer, describes her UCL Centre for Advanced Spatial Analysis work on patterns in human behavior, and says Hello World was shortlisted for the Baillie Gifford Prize and the Royal Society Book Prize.
Says she joins the Faculty in January 2025 as Cambridge’s first Professor for the Public Understanding of Mathematics, as announced at an event run by the Faculty’s outreach initiative.
The university’s own people page for her carries this announcement headline, dated November 22, 2024, and describes her as a mathematician, best-selling author and science presenter.
Describes the episode as an Imperial College London experiment to assess the brainpower of the nation, with Fry and Michael Mosley presenting. It concerns members of the public, not a score of hers.
Confirms identity: Hannah Fry, described as “British mathematician and TV presenter (1984-).”
The sources behind our estimate
The figures that circulate for Hannah Fry, what we were able to confirm, and where the two diverge.
No IQ figure circulates for Hannah Fry in her biographies or in the pages of the institutions that employ her, although people do search for “Hannah Fry IQ” and “Hannah Fry IQ estimate.”
Her Wikipedia biography, the Royal Institution’s profile of her and the University of Cambridge’s Faculty of Mathematics describe degrees, posts, books and programs, and none gives an IQ. She co-presented The Great British Intelligence Test (BBC Two, 2020), which tested members of the public in an Imperial College London experiment, not her own score.
With nothing circulating, there is no spread to audit. 135–150 is this site’s estimated range for Hannah Fry and the only figure on the page. It rests on a record, not a test, so its floor, its top and its fifteen-point width are judgments.
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.
Hannah Fry — frequently asked
What is Hannah Fry’s IQ?
No IQ test result has been published for Hannah Fry, so Hannah Fry’s IQ is unknown. This site’s estimated range is 135–150, on a scale with a mean of 100 and a standard deviation of 15. It is inferred from her UCL doctorate and her Cambridge professorship, not from a test.
What is Hannah Fry’s IQ score?
There is no published Hannah Fry IQ score. Her Wikipedia biography, the Royal Institution and the University of Cambridge list degrees, books and posts but no test result. The only figure on this page is an estimated range of 135–150 inferred from her record, not a measurement.
Did Hannah Fry take an IQ test?
No IQ test result for her has been published. She co-presented The Great British Intelligence Test on BBC Two in 2020, an Imperial College London experiment on the brainpower of the public, but it reported results for participants, not for the presenters. There is no Hannah Fry IQ estimate from that program.
How smart is Hannah Fry?
Hannah Fry’s record is that of an accomplished research mathematician. She completed a UCL PhD in 2011 and became a professor, and in January 2025 she became Cambridge’s first Professor of the Public Understanding of Mathematics. No test score measures this; the estimated range of 135–150 is an inference.
Is Hannah Fry a genius?
The documented record is that of a doctorate-level mathematician and prize-winning communicator, not a measured genius. The Royal Society’s 2024 David Attenborough Award, quoted on Wikipedia, praised her popularising of maths. “Genius” has no fixed IQ cut-off, and no score backs the word for her.
How does Hannah Fry’s estimated IQ compare with Brian Cox’s?
This site estimates 135–150 for Hannah Fry and 125–140 for Brian Cox, so the ranges overlap from 135 to 140. Both rest on a completed doctorate and a university chair, not a test. Fry’s range is placed higher because of her mathematics research record, but the difference is a judgment.
What did Hannah Fry study?
Hannah Fry studied mathematics at University College London and completed a PhD there in 2011, supervised by Frank T. Smith. According to Wikipedia, the research concerned fluid dynamics and the Navier–Stokes equations, and the thesis is cited as A Study of Droplet Deformation.
How does my IQ compare with Hannah Fry?
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 Duncan.Hull, CC BY-SA 4.0. Background removed for the portrait above. · Photograph by the Institute for Pure & Applied Mathematics (2026), CC BY 4.0. Background removed for the portrait above. · Photograph by Newhcrossaint (2025), CC BY-SA 4.0. Background removed for the portrait above.
_(cropped).jpg){kind=link}
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.
Find your IQ score now! →