IQTest-Free.io is a free, non-verbal IQ test that shows how its score is worked out. You answer 30 questions built from shapes and numbers, and you get a score, the range it most likely falls in, and every step used to get there. There is no account to create and no email to give.
What the test asks
Every question is a pattern with a rule behind it: a three by three grid, a number sequence, or a pair of figures where one turns into the other. There's nothing to recall, no vocabulary, and no general knowledge, which is why the test asks the same thing of everyone regardless of the language they read in.
How the test is built
Where the questions come from
The items are generated from rules rather than copied. Published instruments such as the Raven matrices or the Cattell scales are under copyright and can't be reproduced, and hand-written imitations tend to carry the author's blind spots. Generating from rules gives a bank of 320 items whose difficulty is controlled by how many attributes vary at once, rather than assigned by eye.
How new questions are tested
New items aren't scored right away. They're mixed into real tests as unscored questions until enough people have seen them to tell whether they behave: whether the right proportion of people get them right, and whether the people who do well overall are the same people who get them right. Only then do they start counting toward a score.
How the score is made
Correct answers and the guessing correction
Your raw score is the number of scored questions you answered correctly. Every question you got wrong, skipped, or never reached costs a quarter of a point, so answering at random works out to roughly zero rather than a flattering 20 percent.
Placing it on the IQ scale
That corrected score is placed in the distribution of everyone who has completed the test under valid conditions, and the position is converted to the usual scale where 100 is the middle and 15 is one standard deviation. While not enough people have finished the test, a provisional formula is used instead, and your result says so. Reported scores are held between 55 and 145: beyond that, 30 questions simply can't tell the difference.
The range around your score
The result comes with a range, not just a number. We measure how consistently the items agree with each other, turn that into a margin of error, and report the interval you would expect to land in if you took the test a second time. The full method is on How this test works.
What it doesn't tell you
It's a screening test you take in a browser, not a clinical assessment. It can't diagnose anything, it isn't accepted anywhere as evidence of ability, and it does not measure creativity, judgment, persistence, or any of the things that actually decide how a life goes. Our disclaimer sets this out in full.
The comparison group is people who chose to take an online IQ test. That's not a random sample of the population, and a score here is best read as your standing among the people who showed up.
How the site is funded
IQTest-Free.io shows ads served by Google AdSense. That is how the site pays for itself. The test and your result stay free: no paywall, no email gate, no paid report.
Contact
Questions, corrections or press: write to [email protected], or use the contact page.