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Wozniak is the rare case where the circulating number has a named source: he said it. That makes it easier to trace than most figures here, and no more verifiable.
This is an achievement estimate and it rests on one narrow, extraordinary talent. Wozniak has never published a test result, and his own account of an early score is a recollection, not a record.
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 →Stephen Gary Wozniak was born in San Jose in 1950, the son of a Lockheed engineer. He built the Apple I as a hobbyist project for the Homebrew Computer Club and was persuaded to sell it by Steve Jobs, with whom he founded Apple in 1976.
The Apple II, released in 1977, was his design almost in its entirety, and it is the machine that made Apple a company rather than a partnership. His standing among engineers rests less on the products than on the economy of the circuits underneath them — most famously the Disk II controller, which did in eight chips what competitors were doing in dozens.
He was badly injured in a light aircraft crash in 1981 and did not return to Apple full-time. He completed his Berkeley degree in 1986, taught fifth-grade computing for several years, and has spent the decades since as a public figure rather than a working engineer.
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.
Following a claim back to its first appearance is the part almost nobody does — and it is what most people are actually asking.
Most figures in this section have to be traced backwards through aggregator pages until the trail goes cold. This one does not. The number originates with Wozniak describing his own childhood. That makes it the most honestly sourced claim here, and it still fails the same test as the rest.
The problem is the scale. Before deviation scoring became standard, childhood IQ was commonly reported as a ratio: mental age divided by chronological age, times one hundred. A bright eight-year-old testing at the level of a sixteen-year-old scores 200 on that method. The same child on a modern deviation-scored test would score far lower, because deviation scoring places you against others of your own age rather than measuring how far ahead of it you are. A ratio IQ of 200 and a deviation IQ of 200 are different measurements wearing the same number.
This is the identical problem that inflates Terence Tao to 220–230, and the two pages are worth reading together. In both cases a real childhood assessment, correctly reported at the time, has been carried forward onto a scale it was never on.
Set beside Steve Jobs, the contrast is instructive. Jobs supplied no figure himself and has a large circulating one anyway; Wozniak supplied his and it is still unverifiable. The provenance of a number and the truth of a number are separate questions.
How we read a number →His own account of his childhood, his father’s teaching and the design of the Apple machines. The best available source on the early years.
The Disk II controller. Cited here as achievement evidence, since no test evidence exists.
Awarded jointly with Steve Jobs. An externally judged record of contribution.
No score, test name, date or administering body has ever been published. The only figure in circulation is Wozniak’s own recollection.
Original interview and first-appearance date pending audit.
All trace to the same self-report, restated without the qualification that it describes a childhood assessment.
The figures that circulate for Steve Wozniak, what we were able to confirm, and where the two diverge.
That his childhood IQ was over 200, quoted from his own remark that he was identified as a math wizard and had an over-200 IQ when he was very young.
The quotation is real and Wozniak has repeated the substance of it. What is missing is everything that would let anyone check it: which test, administered by whom, in what year, and on what scale. A childhood score above 200 in that era would almost certainly be a ratio IQ — mental age over chronological age — which produces very large numbers for young children and does not convert to the deviation scale modern tests use.
The spread is narrow because there is only one source and everyone is copying it. That is the opposite of corroboration.
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.
No test result has ever been published. The figure of 200-plus comes from Wozniak’s own description of a childhood assessment, with no test, date or scale attached to it.
He has said so, describing himself as having been identified as a math wizard when very young. A childhood score that high would almost certainly be a ratio IQ, which does not convert to the scale modern tests use.
A ratio IQ divides mental age by chronological age, so a child years ahead of their age scores very high. A deviation IQ scores you against other people of your own age, and is bounded by how many people occupy the tail. The same person can score 200 on the first and far less on the second.
There is no public record of Mensa membership. The question circulates widely and appears to originate from the same self-reported childhood figure.
A UC Berkeley EECS degree completed in 1986, the Apple I and Apple II designs, the eight-chip Disk II controller, and the National Medal of Technology in 1985.
Steve Jobs is estimated here at 150–160, on a record of judgement and product direction rather than engineering. Wozniak sits marginally higher on a narrower and better-documented technical record.
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.
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 business & tech profiles, starting with Steve Jobs.
Portrait © Matthew Yohe, CC BY-SA 3.0. The background-removed portrait above is a derivative work and is likewise offered under the same licence. · Portrait © Debbie Rowe / The Royal Society, CC BY-SA 3.0. The background-removed portrait above is a derivative work and is likewise offered under the same licence. · Portrait by Christopher Smith, U.S. Department of Health and Human Services — a work of the U.S. federal government, public domain. Background removed for the portrait above.
Thirty questions, scored against general-population benchmarks. Your score, your percentile, your ability breakdown and a printable IIF certificate.
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