What is L Lawliet’s IQ?
The rival gets no number either.
Death Note never gives L a number either, and fan estimates for him are less anchored than the ones that circulate for Light Yagami: figures between 190 and 250 appear on fan wikis, a sixty-point spread with no shared source. The story’s only quantified statement about L is a tie — with the character it profiles elsewhere on this site.
L Lawliet’s estimated IQ
- Ties Light Yagami for first place on the To-Oh University entrance exam, entering under an alias and jointly delivering the freshman address.
- Operates as three publicly distinct top-ranked detectives at once — L, and two invented rival personas, “Eraldo Coil” and “Deneuve,” reputed to be the world’s second- and third-best.
- Narrows a motiveless, nationwide string of killings to a single named suspect through pure inference, before his opponent gains any supernatural countermeasure.
As with every fictional estimate on this site, L is only as clever as the plot requires, and his opponent only as slow as the story needs him to be at each point. Read this range as a rating of the portrayal, not a person.
- First appearance
- Death Note chapter 2, “L” (Volume 1, 2004)
- Created by
- Tsugumi Ohba (writer), Takeshi Obata (artist)
- Real name given in
- Death Note 13: How to Read — not in the main 108 chapters
- Aliases
- Ryuzaki, Hideki Ryuga, Eraldo Coil, Deneuve
- Canonical IQ
- None given anywhere in the source material
What an IQ of 178–195 actually means
Set the claim aside for a moment. If someone genuinely scored in this range, here is what that would represent.
Average is 100 by construction, and about two-thirds of people fall between 85 and 115. Take the test to place your own score on this scale.
| 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 L Lawliet is
Death Note was written by Tsugumi Ohba and illustrated by Takeshi Obata, serialised in Weekly Shōnen Jump from December 2003 to May 2006 across 108 chapters and twelve collected volumes.
L is introduced in the story’s second chapter as a reclusive, eccentric detective contacted only by voice and text, brought in to investigate a string of killings later attributed to “Kira.” He is not shown on the page until several chapters later. He works under aliases including Ryuzaki and, undercover at To-Oh University, Hideki Ryuga; his given name, L Lawliet, appears only in the official guidebook, not the main story.
The investigation becomes a direct contest between L and Light Yagami, structured almost entirely around inference, misdirection and reasoning about what each can know about the other — the feature of the series that puts both characters in intelligence discussions at all.
By Elora Mercer, Celebrity Research WriterFigures checked by Leon Falkner, Data & Research AnalystReviewed by Aarav Vardhan, Editor-in-Chief · Last reviewed August 2026
L Lawliet: 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.
- 2003Death Note begins serialisation; L is introduced in chapter 2.
- 2004Ties Light Yagami for first place on the To-Oh University entrance exam (chapter 19).
- 2004–2006Leads the task force investigation into the Kira killings.
- 2006Serialisation ends after twelve volumes; the anime adaptation begins.
Where the 190–250 figure came from
Following a claim back to its first appearance is the part almost nobody does — and it is what most people are actually asking.
L and Light are introduced as matched, and the story spends its first half proving it: the To-Oh tie, in Death Note chapter 19, has both of them entering under assumed names and delivering the entrance address jointly after identical perfect scores. Neither the exam ranking nor anything else in the text separates them numerically.
The case for ranking L above Light Yagami on this site rests on what happens after the tie rather than the tie itself. L’s reasoning holds under constrained information for most of the story’s length, and the series’ own creators have described him as written to be the more capable of the two — a structural choice, since the plot needs Light’s Death Note advantage not to resolve the contest immediately. Light’s eventual advantage comes from a supernatural instrument with rules that happen to favour him, not from outreasoning L on equal terms.
L also belongs in the company of Sherlock Holmes more than Light does. Both are written performing inference from minimal cues rather than academic recall — L runs two invented alter-egos as decoy “rival” detectives, a misdirection built entirely on manipulating what other characters believe he knows, in the Holmes tradition of reasoning that has no examination equivalent.
How we read a number →The source text. Chapter 19 (“Humiliation,” Volume 3) establishes the To-Oh tie with Light Yagami. Contains no IQ figure for any character.
Official companion guidebook. Gives L’s full name, L Lawliet — which does not appear in the 108 numbered chapters — and contains no numeric IQ figure.
Neither the manga, the anime, nor the official guidebook assigns L an IQ score.
Source URLs and first-appearance dates pending audit.
The most-cited collection of these figures, the Death Note Fanon Wiki, identifies itself as fan-canon rather than canon.
L is placed above Light Yagami and grouped with the Holmes tradition of inference-based reasoning, on the grounds set out above.
The sources behind our estimate
The figures that circulate for L Lawliet, what we were able to confirm, and where the two diverge.
Figures between 190 and 250 circulate on fan wikis and character-power-ranking sites, with no two sources agreeing on a number.
No IQ score for L appears in the manga, the anime, or the official companion guidebook Death Note 13: How to Read — the closest thing this franchise has to a databook. The Death Note Fanon Wiki page that collects these numbers labels itself fan-canon on its own page, i.e. explicitly not canon. The character’s only quantified trait in the source material is the same one Light Yagami has: a perfect score on the To-Oh University entrance exam, tied between them.
A sixty-point spread for a character whose only quantified trait in canon is a tie with Light Yagami — who gets his own sixty-five-point spread online, for exactly the same reason.
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.
L Lawliet — frequently asked
What is L’s IQ in Death Note?
No figure is given anywhere in the source material — not the manga, the anime, or the official guidebook. The numbers online, 190 to 250, come from a fan wiki that labels itself non-canon.
Is L smarter than Light Yagami?
The story ties them numerically at the To-Oh entrance exam. This site ranks L slightly above Light because his reasoning holds up for longer under equal constraints, and the series’ creators have described him as written to be the more capable of the two.
What is L’s real name?
L Lawliet — given only in the official companion guidebook, Death Note 13: How to Read. It never appears in the manga’s 108 numbered chapters.
What aliases does L use?
Ryuzaki, with the Japanese task force; Hideki Ryuga, undercover at To-Oh University; and two invented rival-detective personas, Eraldo Coil and Deneuve.
Where do the IQ figures for L online come from?
A fan wiki called the Death Note Fanon Wiki, which identifies its content as fan-canon on its own page. No figure traces to the manga, the anime or any official material.
How does L compare to Sherlock Holmes on this site?
L is grouped with Sherlock Holmes rather than with Light Yagami — both are written performing inference from minimal information, rather than the academic and strategic excellence that defines Light’s portrayal.
How does my IQ compare with L Lawliet?
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 fictional profiles, starting with Sherlock Holmes.
- 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 fictional profiles — same field, same method
More fictional
Photograph of a cosplayer as Lelouch Lamperouge by Benlisquare, CC BY-SA 4.0. Lelouch Lamperouge is a character created by Sunrise, Ichirō Ōkouchi and Gorō Taniguchi. Cropped and with background removed for the portrait above. · Photograph of a cosplayer as Kakashi Hatake by big-ashb, CC BY 2.0. Kakashi Hatake is a character created by Masashi Kishimoto, from Naruto. Cropped and with background removed for the portrait above. · Photograph of a cosplayer as Reed Richards by William Tung (WonderCon, April 2017), CC BY-SA 2.0. Reed Richards (Mister Fantastic) is a character created by Stan Lee and Jack Kirby for Marvel Comics. Cropped and with background removed for the portrait above.
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