Free IQ Test
35 matrix-reasoning puzzles in 25 minutes. Your IQ estimate, percentile and classification appear the moment you finish — nothing is held back, nothing to pay.
Each puzzle is a 3×3 grid with one missing cell — pick the option that completes the pattern. Puzzles are freshly generated for every attempt (same rules and difficulty, new variants), and you can go back within the time limit.
Never seen matrix puzzles before? Warm up with 10 practice questions (with explanations) →
Your estimated IQ
Screening estimate (±7 points typical) — not a clinical assessment. How scoring works
What this test measures
Every puzzle here is matrix reasoning: a 3×3 grid follows one or more hidden rules, and you infer the missing cell. This format — used by Raven-style tests and the fluid-reasoning sections of professional batteries — is the classic measure of fluid intelligence: solving novel problems without relying on learned knowledge. Because it uses no words or numbers, it is largely fair across languages and education levels.
Fluid reasoning is the single strongest component of general intelligence, which is why a pure matrix test makes a good screening estimate. It is also only one component: a full professional assessment adds verbal comprehension, working memory and processing speed, which is one of several reasons an online score is an estimate rather than a measurement.
How your score is calculated
Your raw score (0–35 correct) is mapped onto the standard IQ scale — mean 100, standard deviation 15 — using calibration norms for your age group. The result is capped at 145, because a 35-item test cannot honestly discriminate beyond that. The full calibration model, including its assumptions and error margins, is documented openly on the methodology page.
After you finish, your result page links to a detailed interpretation of your exact score — percentile, rarity, what the research does and doesn't say about that range — drawn from our score interpretation guides.
Frequently asked questions
How accurate is this IQ test?
It is a screening estimate, not a clinical measurement. The 35 matrix items measure fluid reasoning — the strongest single component of general intelligence — and your score is mapped onto the standard IQ scale (mean 100, SD 15). Expect a margin of roughly ±7 points versus a professionally administered test, with accuracy dropping near the extremes. Our methodology page explains exactly how scoring works.
Why is the maximum score 145?
Because reporting higher would be dishonest. A 35-item online test does not contain enough very hard, well-calibrated items to distinguish 150 from 165 — no online test does. Sites that hand out scores of 160+ are flattering you, not measuring you. If you hit our ceiling, the honest reading is "well above 130 — verify under supervision if it matters."
Do unanswered questions count against me?
Skipped and unanswered questions are simply scored as incorrect. There is no extra guessing penalty, so if time is running out, an educated guess is always better than a blank.
Can I take the test more than once?
Yes, as often as you like — it is free, and every attempt gets freshly generated puzzle variants (same rule structure and difficulty ramp, new shapes and configurations), so you are never just re-answering memorized items. Format familiarity still inflates retakes by a few points, which is why your first calm, focused attempt is your most meaningful score.
Is it really free? What is the catch?
Really free: your score, percentile and classification appear immediately, with no email address, account, or payment. The site is supported by advertising on our reference pages. We built it this way because most "free" IQ tests hide your result behind a paywall — we think that model deserves to die.
Is this an official Mensa test?
No — and no online test is. Mensa and similar societies only accept scores from supervised, professionally administered tests. This test uses the same puzzle style (matrix reasoning) as many admission tests, so it works well as practice and as a first estimate of whether attempting Mensa admission is realistic (their cutoff is the top 2%, about IQ 131 on an SD-15 scale).