IQ Test
Take a free online IQ test with 18 timed questions across pattern recognition, number sequences, verbal analogies, and logical reasoning. Get your estimated IQ score, percentile rank, bell curve visualization, and score comparison across Wechsler, Stanford-Binet, and Cattell scales.
Test Your Cognitive Ability
This test measures your reasoning ability across four categories. Each question is individually timed — answer carefully but quickly.
Pattern Recognition
5 questions · Visual matrix puzzles
Number Sequences
5 questions · Find the next number
Verbal Analogies
4 questions · Word relationships
Logical Reasoning
4 questions · Deductive logic
No back button or pausing. Each question has its own time limit. Your score factors in both accuracy and speed.
Quick Facts
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How to Use This Calculator
- Click 'Start Test' to begin. The test has 18 timed questions across 4 categories.
- Read each question carefully and select your answer before the timer runs out.
- Answer as quickly and accurately as you can — speed affects your score.
- After the final question, review your IQ score, percentile, and category breakdown.
The Formula
Raw score (accuracy × difficulty + time bonus) is mapped to a normal distribution with mean 100 and standard deviation 15 using the inverse normal CDF, producing a Wechsler-scale IQ estimate.Frequently Asked Questions
This is an estimation tool for entertainment and education. Clinical IQ tests like the WAIS-IV are administered by psychologists over 1-2 hours. Our test covers similar reasoning domains but with fewer questions. Expect a rough estimate within ±5-10 points of a clinical result.