— Famous people & IQ

Simone de Beauvoir IQ: 150 (estimated)

Estimated IQ

150

Field

Philosopher

Source basis

Existentialism, feminism

Rarity

top ~0.13%

Important note: Simone de Beauvoir's IQ figure of 150 is an estimate. Most published celebrity IQ figures circulate without clinical sourcing. Treat the number as a defensible estimate, not a verified measurement.

Where the 150 estimate comes from

The number is a widely-circulated estimate based on Simone de Beauvoir's documented work, peer assessments, and historical accounts. Like most famous-person IQs, it should be read as a defensible upper-end estimate rather than a measured score.

What the score implies — and what it doesn't

An IQ of 150 is in the Profoundly Gifted range — top 0.13% or so. Capable of mastering arbitrary abstract subjects with comparatively little instruction.

Simone de Beauvoir's achievements in Philosopher reflect more than raw IQ. The pattern across high-achieving figures is that cognitive ability gets you into the game; the variables that determine outcomes from there are conscientiousness, sustained focus, time-on-task, mentorship, environment, and a tolerance for the social isolation that often accompanies deep specialized work.

Comparison with peers in Philosopher

Person	Est. IQ	Note
John Stuart Mill	180	Cox estimate
Voltaire	190	Cox estimate
Bertrand Russell	180	Principia Mathematica
Ludwig Wittgenstein	170	Logical positivism
Karl Marx	160	Cox estimate
Simone de Beauvoir	150	Existentialism, feminism

How does your IQ compare to Simone de Beauvoir?

Take a 20-minute calibrated test against the same standard distribution — see your six-axis cognitive profile.

The limits of celebrity IQ estimates

Historiometric estimates like Cox's are biographical inference, not measurement. Catharine Cox herself rated the reliability as "I" through "IV"; many figures are rated "III" or "IV" — weakest evidence.
Childhood ratio-IQs (mental age / chronological age × 100) systematically inflate scores compared to modern deviation IQ. A 1900-era child labeled "IQ 200" would likely test 140-160 on a modern WAIS.
Self-reported figures from public figures are essentially never independently verifiable.
Achievement is not pure intelligence. The correlation between extreme achievement and pure IQ peaks around 130-140; above that, conscientiousness and circumstance dominate the variance.

Frequently asked

What is Simone de Beauvoir's IQ?

Simone de Beauvoir's IQ is widely estimated at 150, based on existentialism, feminism. This is an estimate, not a clinically measured score.

Did Simone de Beauvoir actually take an IQ test?

Likely not a formal modern IQ assessment. Celebrity IQ figures are usually estimates from secondary sources rather than verified clinical results.

How accurate is the IQ 150 figure?

Treat it as a defensible upper-end estimate within ±10-15 points. Famous-person IQ estimates carry substantial uncertainty and methodological bias.