Free brain tests, built for accuracy and fun
BrainGauge is a collection of 12 free online brain tests, knowledge quizzes, and skill games. Whether you want to estimate your IQ, measure your reaction time in milliseconds, see how many English words you know, or settle a trivia argument with friends, every test here runs instantly in your browser — no account, no downloads, and nothing behind a paywall.
What can you test?
- Cognitive ability: our free IQ test covers logic, patterns, math, and verbal reasoning, while the memory test, reaction time test, and spatial reasoning test measure specific mental skills.
- Knowledge: challenge yourself with American trivia, U.S. geography, U.S. history, pop culture, and a vocabulary size test.
- Skills: race through the maze escape challenge, sprint through mental math, or check your WPM on the typing speed test.
How scoring works
Each test gives you an instant score with context: percentile comparisons, letter-grade style ratings, and explanations for every question you miss. Your personal bests are saved on your device so you can track improvement over time — we never ask for your email or store your results on a server.