We are a free, multilingual platform offering science-based IQ and cognitive estimates in 13 languages. This page explains how our tests are built, how we keep content accurate and current, and the honest limitations of any online IQ estimate so you can interpret your results responsibly.
Our mission is to make thoughtful, science-based cognitive testing free and accessible to everyone, in 13 languages. We provide IQ and reasoning estimates as educational tools that help people explore how cognitive testing works and reflect on their own thinking. We are independent and supported by advertising, and we keep the core test free to take with no account required.
Our items draw on established psychometric principles, including Raven's-style progressive matrices for fluid reasoning and the Cattell-Horn-Carroll (CHC) model of intelligence, which organizes abilities such as fluid reasoning, processing speed, and acquired knowledge. Scores are mapped to the standard normal distribution with a mean of 100 and a standard deviation of 15, the convention used by major clinical tests. We design item sets to target good internal consistency (in the range of Cronbach's alpha 0.85-0.92) and apply age-norming so results are compared against an appropriate reference group.
We review our explanatory content against established sources in psychometrics and intelligence research, and we revise it as the science evolves. Articles carry visible update dates, and we cite or reference research where relevant, including topics like the Flynn effect and reverse Flynn effect. When findings are preliminary or contested, we say so plainly rather than overstating certainty.
An online IQ test is an educational estimate, not a clinical diagnosis. Scores can be influenced by practice, fatigue, language, cultural familiarity, motivation, and broad population trends such as the Flynn effect. Only a proctored, professionally administered test (such as the WAIS or Stanford-Binet) provides a clinically valid score, and our results are not admissible for Mensa or other high-IQ society membership. Treat your result as informative and motivating, not as a fixed verdict on your ability.
Our content is produced and maintained by an editorial team with experience in psychometrics, science writing, and educational content, working to a consistent standard of accuracy, balance, and clarity. We aim for non-clickbait, answer-first explanations and avoid sensational claims about intelligence, individuals, or groups. We do not attribute content to fictitious experts; responsibility rests with the editorial team as an organization.
You can take the test without providing personal data, and we do not require an account or identifying information to deliver a result. Any country or regional IQ comparisons we present are framed neutrally as data about testing conditions and history, never as claims about the innate superiority of any group. We encourage using results for self-reflection and learning, and discourage using them to label or rank people.