About the Author
Operator of ThinkRank. A long-time puzzle and competitive-game fan, he looks after how the 30 stages are scored and how scores are mapped to percentiles on the standard IQ distribution. He believes a rank is only useful if you can see exactly how it was calculated.
Expertise & Background
- ✓Runs ThinkRank and its scoring
- ✓Maintains the score-to-percentile tables (IQ scale, mean 100, SD 15)
Methodology: How this test works
What it measures: Built on item formats established in cognitive science, the test has 30 questions across four areas — logical reasoning, spatial perception, numerical processing and verbal comprehension. Through matrix reasoning, number series, figure rotation and more, it gauges pattern recognition, logical thinking, spatial awareness and processing speed.
Scoring: Each question has a time limit, and answers are weighted by difficulty (easy, medium, hard). Your overall score rate is mapped to a deviation-IQ scale centered on 100.
Refinement: We continuously review the difficulty balance and score conversion using data from over 200,000 answered questions.
What it is: This is an online estimate for educational and self-understanding purposes. Unlike standardized clinical assessments such as the WAIS administered by a licensed psychologist, the result should be used as a guideline.
Editorial Policy
Articles are written based on cognitive science and statistics, cite authoritative primary sources, and are regularly reviewed and updated to reflect the latest research.
Operated by Amaterous.com (Sapporo, Japan)
Pricing & how it works — FAQ
Is the IQ test free?
Taking the test (30 questions, about 5 minutes) is free, with no registration or email required. Only viewing your result is paid.
How much does the result cost?
It is a one-time purchase: US$2.99 for the score only, US$9.99 for the full report with a 5-area analysis and PDF certificate, or US$19.99 including explanations for all 30 questions. It is not a subscription.
Is payment safe? Can I get a refund?
Payments are processed by Stripe and support credit cards plus regional payment methods. If anything goes wrong after payment, contact us and we will refund you.
Disclaimer
The tests and articles on this site are provided for educational and self-understanding purposes. They are not a substitute for medical diagnosis, psychological evaluation or treatment.
An IQ score is only an estimate and varies with your condition, environment and familiarity with the test format. No single result determines a person's ability or worth.
If you are concerned about a developmental disorder, learning disability or mental health condition, please consult a physician or a qualified medical institution. Articles reflect the information available at the time of writing; we strive for accuracy but make no guarantee.