Free IQ tests, scored on a real bell curve.
Six cognitive tests on a normal-distribution IQ scale (mean 100, SD 15). Take one for a domain score, or three or more for a composite IQ and a profile of your strengths.
- Free, forever
- No signup
- Results stay on your device
An IQ of 128 sits at the 97th percentile, higher than 97% of people. Every result is placed on this curve; the shaded region is your percentile.
Calibrated scoring
Raw scores map to IQ through the inverse normal CDF, the same normal distribution (mean 100, SD 15) that standardized tests use. Not a personality quiz.
Composite profile
Finish three or more domains and your scores combine into a weighted composite IQ, with a radar chart showing where you are strong and where you are not.
Private by design
No account, no email, no server-side database. Results live in your browser. Share links are HMAC-signed, so a score cannot be forged by editing the URL.
Six cognitive domains
30 questions each. Take them in any order.
Build your composite IQ
Complete any three domains and CalibratedIQ combines them into a single weighted IQ, then renders a radar chart of your cognitive profile. Scores persist, so each test sharpens the estimate.
View composite score →Research & methodology
Plain-language reference on how IQ is calculated, how to read the scale, what these tests can and cannot tell you, and the research behind each cognitive domain.
Read the guides →CalibratedIQ is an independent project and is not affiliated with Mensa International. For official testing, visit mensa.org. These assessments draw on established psychometric methodology; scores are provided for educational and entertainment purposes, not clinical diagnosis.