Senku Ishigami IQ

Senku Ishigami's IQ is about 165 (range 155 to 175): the widest scientific knowledge and fastest practical invention in his cast, discounted for a story that keeps handing him what he needs.

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Key facts

Estimated IQ
IQ 165
Range
155 to 175
Compare with
Kurisu Makise, Tony Stark, Reed Richards and Edward Elric
Confidence
Medium. A fair amount of evidence, with some gaps.
Franchise
Dr. Stone. Manga (2017 to 2022) and anime (2019-present)

Fan analysis by the LifeScore Editorial Team, reviewed September 2026. Contains major spoilers. How we estimate

What is Senku Ishigami's IQ?

Senku is one of the few characters whose intelligence shows up as things that exist: revival fluid, antibiotics, a working phone, a seagoing ship. He combines knowledge across chemistry, engineering and biology with the ability to improvise from scarce materials. What keeps him below the top of the scale is a story that lets him remember every recipe and gives him time to try things. What keeps him well above 150 is that he is almost never wrong on the science.

Age-normed for a teenager, about 15 to 17 across the story.

How they score

Six ratings out of ten, each based on what is shown on the page or screen. They show how the estimate is built; they are not averaged into it.

DeductionSolving new problems from thin information
8/10
StrategyMulti-step plans that account for other minds
8/10
KnowledgeDepth and breadth of what they know
10/10
InventionBuilding or devising something genuinely new
10/10
AdaptabilityRecovering when the plan breaks
9/10
Reading peopleUnderstanding what other people want and will do
6/10

Scene-by-scene evidence

  1. Counting through the petrification

    Moderate evidence

    Dr. Stone, opening chapters

    When a flash of light petrifies humanity, Senku stays conscious inside the stone and counts off seconds for the years that follow, refusing to let his mind go. The stone lasts about 3,700 years, and he is still working when he breaks free. Part of it is stubbornness, but it is also a scientist's move: give yourself a clock, keep your reasoning intact, and act on data when you wake. It sets the tone for everything that comes after.

  2. The revival fluid

    Strong evidence

    Dr. Stone, early Stone World chapters

    Awake in a ruined world, Senku studies the petrified humans and works out that nitric acid can revive them. He builds a revival compound and uses it to bring back Taiju first, then Tsukasa and Yuzuriha. He has to find the chemistry, source the ingredients with almost no infrastructure, and get it right. The result is what moves the plot, and it is the clearest example of applied problem-solving from scratch, which is what the invention score rests on.

  3. Curing Ruri's pneumonia

    Strong evidence

    Dr. Stone, Kingdom of Science / Ishigami Village arc

    In the village descended from his father's group, Senku produces a sulfa drug to treat Ruri's pneumonia. That means knowing which compound to target, working out a reaction route with primitive equipment, and building the small industry needed to make it in time. It is a memorable case of turning an abstract fact from a textbook into a working medicine under a deadline, and it shows his knowledge extends well beyond one specialism.

  4. Building a cell phone

    Strong evidence

    Dr. Stone, Kingdom of Science years

    Later in the story Senku builds a working cell phone in a world with no electronics industry. That means a chain of dependent technologies: wire, power, components and a communication scheme, each made before the next can work. He plans the path several steps ahead and executes it with a small team. It is engineering and project planning in one feat, and it fits the pattern of a mind that thinks in dependency trees.

  5. The Perseus and the wider world

    Moderate evidence

    Dr. Stone, Age of Exploration arc

    Senku oversees construction of the Perseus, a ship that takes the Kingdom of Science across the ocean, with Ryusui as captain. It is a project on a far larger scale than a laboratory, needing labour, materials and navigation. Leading such a build is not pure intellect, but it broadens the picture of what he can do and confirms that his ideas scale from chemistry to logistics. Scaling a plan from a village workshop to an ocean crossing is a step change in complexity.

  6. Talking Why-Man into leaving

    Moderate evidence

    Dr. Stone, final arc (late-story spoiler)

    In the last stretch Senku negotiates with the collective consciousness behind the petrification devices, called Why-Man, and persuades almost all of the devices to leave humanity alone. Reasoning with an alien intelligence about its own goals is a very different task from building a machine. It shows that his problem-solving stretches into argument and persuasion, which is one of the reasons the estimate sits well up in the extraordinary band.

What holds the number down

  1. Convenient recall

    Dr. Stone, throughout

    Senku remembers exact quantities and procedures for a very wide range of technologies, on demand. No real person could do that. The story treats it as a fact of the character rather than something he has to work for, so we discount for it.

  2. Resources appear when needed

    Dr. Stone, throughout

    The right ore, plant or animal is often within reach at the moment it is required, and a real reconstruction would stall far more often. His skill at working with what is at hand is genuine, but the setting is kind to him, and that softens how much any single build tells us.

  3. Underestimating Tsukasa

    Dr. Stone, Tsukasa arc

    Tsukasa opposes Senku's plan to rebuild civilization and appears to kill him when he refuses to back down. Senku survives, but the encounter shows that his read on people trails his read on chemistry, and that his early plan had no answer to a determined, physically dominant opponent.

Why 165, and not higher or lower

Senku sits near the ceiling on knowledge, invention and adaptability, and his error rate on the science is very low. The counterweight is plot armour: he recalls procedures in exact detail, and the right resource turns up when the story needs it. We treat that memory as generous fiction rather than proof of an unmeasurable mind. 165 reflects extraordinary breadth and sustained builds, discounted for convenience.

IQ estimates for fictional characters are fan analysis: an argument from what the story shows, not a measurement. Read the full method and the standards we hold every profile to.

Senku Ishigami's personality and MBTI type

Fans most often type Senku Ishigami as 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.

Openness
Very high
Conscientiousness
Very high
Extraversion
High
Agreeableness
Moderate
Neuroticism
Very 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.

Personality typing is interpretive. It describes how Senku Ishigami behaves in the story and does not affect the IQ estimate.

The debate

Fans put Senku against Kurisu Makise, Tony Stark and Reed Richards. Senku is the strongest builder starting from nothing, while Stark and Richards begin with resources and Kurisu is a theorist. Some claim 200 or more, but that treats convenient recall as raw ability. We place him in the extraordinary band, above Kurisu on invention and roughly level with her on theory. Senku also has one edge none of them share: he does it with almost no starting capital.

For a real-world parallel, 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. See Archimedes' IQ estimate.

Senku Ishigami IQ: frequently asked questions

What is Senku Ishigami's IQ?

The story does not give a number. Our estimate is about 165, with a range of 155 to 175, based on the range and consistency of what he builds and the very few technical errors he makes.

Is Senku a genius?

Yes. He makes revival fluid, a sulfa drug and a cell phone from raw materials, and leads a ship-building project, all with very few errors. The main caveat is how conveniently the story supplies his memory and his materials.

Is Senku smarter than Kurisu Makise?

Overall, yes, because his range and building output are wider. Kurisu is a top theorist in neuroscience and time-travel mechanics, but Senku shows more sustained invention across many fields and under harsher conditions.

Are you smarter than Senku Ishigami? Senku's IQ is about 165. What's yours?

Senku's number is an argument from the story. Yours can come from a real test: 25 visual reasoning questions.

Take the IQ test

25 questions · about 12 minutes

Senku Ishigami and Dr. Stone belong to their respective owners. LifeScore is not affiliated with them. This page is independent commentary and analysis, and estimates are our own opinion.