Srinivasa Ramanujan IQ
Mathematician · 1887–1920
Quick Answer
Srinivasa Ramanujan's IQ is estimated at 155 to 185. No test or study exists; the famous 100 is Hardy's talent scale, not an IQ score.
Ramanujan has no IQ estimate. The famous '100' comes from G. H. Hardy's informal scale of mathematical talent, not an IQ test.
- Estimated IQ
- 170+
- Range
- 155–185
- Known for
- Number theory, infinite series
- Basis
- No documented estimate; editorial comparison from output
Evidence status: Very low confidence. Born after 1850, so outside the Cox 1926 study. No IQ test result is known. Historical achievement cannot be converted into a precise modern test result. This page separates documented evidence from interpretation.
What was Srinivasa Ramanujan's IQ?
Ramanujan never took an IQ test, and he was born after the period Cox's 1926 study covered. LifeScore uses 170+ as an editorial marker, with a range of 155 to 185. The 100 often attached to him comes from G. H. Hardy's informal ranking of mathematicians.
How did Ramanujan learn mathematics?
Mostly on his own. As a teenager in India he worked through G. S. Carr's Synopsis, a dense list of about 5,000 results with few proofs, and then produced his own. He lost college scholarships because he neglected every subject except mathematics.
Where does Ramanujan's '100' come from?
The number is not an IQ score. It comes from an informal scale G. H. Hardy used for natural mathematical talent, as retold by colleagues such as Paul Erdős.
On that scale Hardy gave himself 25, J. E. Littlewood 30, David Hilbert 80 and Ramanujan 100. It was a way of saying Ramanujan was in a different class, not a measurement.
The story is widely repeated and not documented in Hardy's own published writing, so treat it as anecdote.
How smart was Srinivasa Ramanujan?
The letter to Hardy
In 1913 he sent G. H. Hardy pages of theorems, some new, some known, a few wrong. Hardy brought him to Cambridge.
Counting partitions
With Hardy he found a formula that estimates the number of ways to split a number into sums with startling accuracy.
Fellow of the Royal Society
He was elected FRS in 1918, aged 30.
The lost notebook
Pages found in 1976 contained results that mathematicians are still proving and applying today.
How Ramanujan thought
Ramanujan worked by intuition and computation, finding formulas that he checked with examples but often could not prove in the formal way Cambridge expected. Hardy supplied the rigour. Ramanujan supplied results nobody else would have guessed.
Evidence behind the Srinivasa Ramanujan IQ estimate
The estimate is a structured interpretation of the record, not a recovered test score. These are the strongest signals and the reasons for caution.
Evidence considered
- Largely self-taught, he sent G. H. Hardy a 1913 letter packed with theorems, some new, some known and a few wrong.
- With Hardy he found an asymptotic formula for the partition function, a landmark in analytic number theory.
- He was elected a Fellow of the Royal Society in 1918, one of the youngest in its history at that point.
What the estimate cannot prove
- He lost college scholarships by neglecting subjects other than mathematics, so academic records understate him.
- His notebooks mixed proofs with unproved results, which makes the scale of insight hard to measure.
- No psychometric record exists.
Ramanujan vs Gauss, Euler, Turing
How Srinivasa Ramanujan's estimate compares with related figures. Every number here is an estimate, and the basis differs from person to person.
| Figure | Estimate | Range |
|---|---|---|
| Srinivasa Ramanujan | 170+ | 155–185 |
| Carl Friedrich Gauss | 170+ | 160–180 |
| Leonhard Euler | 170+ | 160–180 |
| Alan Turing | 170+ | 155–180 |
Take the Ramanujan IQ test
Srinivasa Ramanujan's estimate is 170+. Our Einstein IQ test is a short visual reasoning challenge. See which side of that number you land on.
Take the Ramanujan IQ testSrinivasa Ramanujan's IQ is represented here by a retrospective estimate of 170+, not a verified test result. Srinivasa Ramanujan is best known for exceptional mathematical intuition. The useful question is what the surviving evidence shows, not whether a precise modern score can be recovered.
Psychological Profile
Largely self-taught and deeply intuitive. Saw results before he could prove them.
The dominant archetype here is The Visionary. This archetype shapes decision patterns: what feels natural, what creates friction, and what blind spots tend to emerge.
Estimated IQ is 170+. This is a rough estimate based on documented accomplishments and contemporary accounts, not a literal measurement.
Key Behavioral Traits
He filled notebooks with nearly 4,000 results in a few years.
He credited his family goddess Namagiri with showing him formulas in dreams.
He died at 32, which makes his output even more striking.
One thing most people do not know
1729 is called the Hardy–Ramanujan number: the smallest number that is the sum of two cubes in two different ways.
Sources for this estimate
Follow the evidence yourself. These sources document the achievements and context used here; none is presented as a standardized IQ report.
- Srinivasa Ramanujan biographyMacTutor, University of St Andrews
Covers his early life, the letter to Hardy and his Cambridge work.
- Srinivasa RamanujanEncyclopaedia Britannica
Summarises his life and mathematical contributions.
What do these scores mean?
See what an IQ of 155, 170, 185 means in percentiles, then browse every famous estimate in one table.
Think like Ramanujan?
Srinivasa Ramanujan's estimate: 170+ (range 155 to 185). See where your own score falls.
Related famous IQs
- Carl Friedrich Gauss IQ170+
- Leonhard Euler IQ170+
- Alan Turing IQ170+
- Nikola Tesla IQ160+
- Isaac Newton IQ160+
- Marie Curie IQ150
- Ada Lovelace IQ145
- Albert Einstein IQ160+
Same Archetype: The Visionary
Explore psychological profiles of contemporary figures analyzed with similar methods.
Browse All ProfilesSigns of High IQ
Traits often discussed alongside high measured IQ:
Srinivasa Ramanujan: People Also Ask
Was Srinivasa Ramanujan a genius?+
Srinivasa's record supports exceptional achievement, but "genius" is not established by an unverified IQ number. Their The Visionary archetype, combined with Mathematical Intuition and Self-Education, is a more useful interpretation of their output.
What personality type was Srinivasa Ramanujan?+
Srinivasa fits the The Visionary archetype. Key traits include Mathematical Intuition, Self-Education, and Devotion. This profile helps explain both their strengths and their documented failure modes.
What can we learn from Srinivasa Ramanujan?+
Srinivasa's profile teaches that extreme strengths create extreme trade-offs. Their Mathematical Intuition and Self-Education enabled success but also created recurring friction.
References & Sources
Cox, C. M. (1926). The Early Mental Traits of Three Hundred Geniuses. Stanford University Press.
Simonton, D. K. (2009). Genius 101. Springer Publishing Company.
Cattell, R. B. (1971). Abilities: Their Structure, Growth, and Action. Houghton Mifflin.