Why Take an IQ Test?
Taking an IQ test is not just a brain workout. An IQ test can result in a lasting impact in your personal life and in your career. Ultimately, it’s about knowing yourself better, which is the key to success.
Create a Pivotal Moment in Your Life
Are you living up to your potential? Intelligence tests like CheckIQ can be the spark of confidence you need to change your life
Compare Your Intelligence to Your Peers
Over 700,000 people have taken our IQ test. See how your IQ compares to the average IQ and to people in your age group and country.
Discover Opportunities That Match Your Potential
Our reliable IQ test reveals your strengths, helping you choose the career and educational paths that fit you best.
Research indicates that IQ scores are a strong predictor of academic success.
Welcome to the International IQ Test.
This IQ test has been taken by over 16 million people and calibrated to the global population using standard psychometric criteria (mean IQ: 100).
You’ll get your IQ score for free. No payment required.
Take our free
Professional IQ Tests
Get your IQ in only 20 minutes and a Score Report
Free scientifically validated IQ tests and psychometric tools.
The Most Accurate Online IQ Test
Assess your IQ with precision using a cutting-edge adaptive online IQ test, developed by the CheckIQ™ research team.
Sleep Test
Learn how to sleep like a pro
Benefits of taking the test
A large study of Spanish adults found that sleep health, measured with RU-SATED, was the single strongest predictor of how healthy people felt, beating out diet, exercise, smoking, and alcohol. In fact, moving from a “poor” RU-SATED score (below 8) to a “good” one (8 or higher) was linked to roughly a 70 percent jump in self‑rated physical wellbeing, more than double the boost seen from the same level of improvement in physical activity. Knowing your own RU SATED score helps you spot exactly which of the six sleep pillars need work, giving you a clear, high‑impact target for better overall health.
History of the test
The RU-SATED checklist began at the University of Pittsburgh, where sleep researcher Dr. Daniel J. Buysse first framed “sleep health” as a positive, measurable goal in 2014 and summed it up with five items called SATED (Satisfaction, Alertness, Timing, Efficiency, Duration). Two years later the team added “Regularity”, emphasizing a steady bedtime and wake‑time—to create the six‑item RU-SATED scale we know today. Early studies from 2016‑2019 showed the new survey was both reliable and useful for large groups of adults. Since then, RU-SATED has been translated into multiple languages, validated on every continent, and adopted by researchers and clinicians alike as a quick snapshot of overall sleep health.
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