All three use the same scoring conventions as the modern Stanford-Binet (mean 100, SD 15) and run entirely in your browser. No sign-up, nothing stored.
Where does your score sit on the bell curve, and how rare is it?
Binet’s original ratio: the mental age implied by a chronological age and an IQ.
Translate between Stanford-Binet 5, older Stanford-Binet, Wechsler, and Cattell.
Pick the test you took. We’ll tell you whether the score qualifies (Mensa = 98th percentile, with cutoffs that vary by scale).
You’re at the 84th percentile here. The full assessment breaks that into five factor scores so you can see why you landed there — Innate Intelligence, working memory, visual-spatial, quantitative, and knowledge.
35 to 45 minutes · Full-Scale IQ + five factor indices · From $49.
Take the test →
A specialized center in educational psychology. Established 2001 in the UK with research and partner sites worldwide.
Secure checkout
