BrainGauge is a free collection of 12 brain tests, knowledge quizzes, and skill games. We built it around a simple frustration: most online tests make you sit through 30 questions and then hide the result behind an email form or a paywall. Here, every test is fully playable and every result is fully visible — free, instantly, every time.
How our tests are built
Our cognitive tests (IQ, memory, reaction time, spatial reasoning) are modeled on classic paradigms from psychology research — Raven-style pattern matrices, Simon-style sequence recall, go/no-go inhibition tasks, and Shepard-Metzler mental rotation. Knowledge quizzes are written and fact-checked against standard references, and every question ships with an explanation so you learn something even when you miss.
What our scores mean
IQ Lab shows actual answer accuracy, explanations, and a separate converted IQ. We assume an accuracy mean of 50 and standard deviation of 20, then map to a display mean of 100 and standard deviation of 15. These product assumptions are not population norms; the nonstandard game score is not actual IQ or a population percentile. Other tests provide their own score context. These activities are not clinical instruments, and no online test is a substitute for a professionally administered assessment.
Privacy by design
Tests run in your browser, and your answers and personal bests stay on your device. We collect anonymous usage and score analytics as described in our privacy policy. No account or email is required.
Contact
Questions, corrections, or feedback? We read everything: [email protected]