Senku Ishigami IQ: How Smart Is Senku?
Fan analysis, for fun · Last reviewed September 2026
Senku Ishigami's IQ is estimated at 170 to 190.
Senku keeps his mind alive by counting seconds for thousands of years, then rebuilds science from rocks and plants, including medicine and phones. His knowledge and planning are both extraordinary.
This is a fan analysis for fun. Senku Ishigami is fictional, so nobody has taken a real IQ test. The range reflects what the character actually does in the story.
- Estimated IQ
- 170 to 190
- Thinking style
- Practical and scientific
- Known for
- Rebuilding civilisation from scratch
- Source
- Dr. Stone (manga 2017 to 2022, anime 2019 onward)
Who is Senku Ishigami?
A mysterious flash turns every human on Earth to stone. Thousands of years later, teenage science obsessive Senku Ishigami breaks free, and decides to rebuild all of civilisation by himself.
He does not have tools, labs or books. He has his memory, the natural world and a plan for what to make first.
The evidence: how smart is Senku?
- 1
Counting the seconds
While petrified, Senku stays conscious by counting every second, without stopping, for about 3,700 years. When he breaks out, he knows roughly what the date is. It is a feat of focus and willpower more than anything, and it is why he wakes up with his mind intact.
- 2
The revival fluid
Senku works out that a mix of nitric acid and alcohol can reverse the petrification. He then makes both from scratch: nitric acid from sources he finds in nature, and alcohol by fermenting grapes into wine. That is the first step of the Kingdom of Science.
- 3
Sulfa drugs for Ruri
In Ishigami Village, the priestess Ruri is seriously ill. Senku plans and leads the production of a sulfa drug, an early antibiotic, which requires glass, chemistry and a long chain of intermediate inventions. The medicine works, and it wins him the village.
How Senku thinks
Thinking style
Practical and scientific
Senku thinks in tech trees. To make medicine he needs glass, to make glass he needs a furnace, to make a furnace he needs the right clay. He breaks impossible goals into long chains of possible steps and keeps everyone working on the next one.
Three strengths
Scientific recall
He remembers chemistry, physics and engineering in enough detail to rebuild them.
Planning chains of steps
He always knows what must be built first for the next thing to be possible.
Getting people on board
He turns villagers and rivals into a team by showing them what science can do.
Two blind spots
Dismissing feelings
He calls emotions irrational, even when they are obviously driving him and the people he relies on.
Personal risk
He puts himself in danger repeatedly because the plan needs him in the lab.
Senku Ishigami's personality type
MBTI type (fan consensus)
ENTP
Senku is most often typed ENTP by fans: inventive, energetic and always thinking out loud. Some argue for INTJ because of his very long-range planning.
Big Five profile
- OpennessVery high
- ConscientiousnessVery high
- ExtraversionHigh
- AgreeablenessModerate
- NeuroticismVery low
Senku combines extreme curiosity with extreme persistence, which is how you get through thousands of years of counting. He is confident and energetic, cheerfully blunt, and almost impossible to discourage.
Curious how your own Big Five compares with Senku's? Take the free personality test.
Senku vs Tony Stark, Rick Sanchez and Kurisu Makise
| Character | Estimated IQ | Thinking style |
|---|---|---|
| Senku Ishigami | 170 to 190 | Practical and scientific |
| Tony Stark | 165 to 180 | Engineering, iteration |
| Rick Sanchez | 190 to 220 | Chaotic invention |
| Kurisu Makise | 165 to 180 | Skeptical science |
- Senku vs Tony Stark: Tony builds in a cave with scrap. Senku builds in a world with no scrap at all.
- Senku vs Rick Sanchez: Rick has better toys. Senku has a purpose, and he cares about the people it serves.
- Senku vs Kurisu Makise: Kurisu is the deeper theorist; Senku is the more practical builder.
Real genius comparison
Senku vs Archimedes
Archimedes combined mathematics with hands-on engineering, designing machines and defences with the technology of the ancient world. Senku does the same thing with even less to start from.
Archimedes's estimated IQ is 165+, a historical estimate from biographical records, not a test score.
Read Archimedes's IQ profileHow we estimate fictional IQs
We look at what the character actually does: problems solved, plans that work, how fast they learn and how they compare with other brilliant characters in the same story. The range is a fan estimate, not a measurement.
Even the low end of the range, 170, would score higher than about 100.000% of people, roughly 1 in 652,598. Real tests become much less reliable this far above average.
Based on the Dr. Stone manga and anime.
Senku Ishigami IQ: common questions
What is Senku Ishigami's IQ?+
Senku Ishigami's IQ is estimated at 170 to 190. Senku keeps his mind alive by counting seconds for thousands of years, then rebuilds science from rocks and plants, including medicine and phones. His knowledge and planning are both extraordinary. It is a fan estimate for fun, based on what Senku does in the story.
What is Senku Ishigami's MBTI personality type?+
Senku Ishigami is most commonly typed ENTP by fans. Senku is most often typed ENTP by fans: inventive, energetic and always thinking out loud. Some argue for INTJ because of his very long-range planning.
Is Senku smarter than Tony Stark?+
Tony builds in a cave with scrap. Senku builds in a world with no scrap at all.
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