Free · No sign-up
Free non-verbal
IQ test
Discover your reasoning power in minutes. Cerebral Assessment is a free, research-based IQ test that uses clean visual puzzles — no words, no cultural trivia, just patterns. Choose the 10-minute quick test for a fast snapshot, or the 25-minute full test for a deeper, more reliable score. Either way, you get your IQ, percentile, and a step-by-step breakdown of every answer — no sign-up required.
Sample item
Shape follows the row, quantity follows the column. Every item is drawn as a clean figure — no language, no cultural knowledge required.
Quick test
10 min20 items in about 10 minutes. A solid estimate when you're short on time.
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Full test
25 min35 items in about 25 minutes. More items means a more reliable score.
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What the test measures
Pattern matrices
Inductive reasoning — spotting the rule that governs a grid of figures.
Number series
Quantitative reasoning — inferring the rule behind a run of numbers.
Spatial rotation
Spatial visualisation — turning a shape in your mind without flipping it.
Odd one out
Classification — finding the one figure that breaks the rule the others share.
Figure analogies
Analogical reasoning — carrying a transformation from one pair over to another.
How scoring works
Harder items count for more than easy ones. Your weighted proportion correct is compared against the expected performance of an average adult on this item mix, then placed on the conventional deviation scale where 100 is the mean and 15 points is one standard deviation.
Roughly two thirds of people score between 85 and 115, and about 2% score above 130. Your results page shows exactly where you land on that curve, plus how you compare with everyone who has taken the test here Not sure how to read your number? See what counts as a good IQ score.
Scores are capped between 55 and 145. A short online test cannot responsibly resolve the extremes — read the methodology page for the honest limits.
Common questions
- Is it really free?
- Yes. There is no paywall, no email gate and no sign-up. The test is paid for by the advertising you see on these pages.
- Do you store my answers?
- Only an anonymous record of your score, the item types you got right and how long you took. No name, no email, no account.
- Can I retake it?
- You can, but expect a small practice boost the second time. The first honest attempt is the most informative one.
- Is this a clinical IQ test?
- No. Professional assessments are administered one-to-one and cover far more ground. This is a well-built estimate for general interest.
Ready when you are
Find a quiet ten minutes, put the phone down, and work as quickly as you can without guessing carelessly.
Start the test