IQ Test
Take a free 18-question IQ test covering patterns, numbers, verbal, and logic. Get your estimated IQ score, percentile, and bell curve.
Test Your Cognitive Ability
This test measures your reasoning ability across four categories. Each question is individually timed — answer carefully but quickly.
Pattern Recognition
6 questions · Visual matrix puzzles
Number Sequences
4 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.
Try a specific IQ test variant
Looking for something different? We offer six variant IQ tests designed around specific formats, difficulty levels, and use cases.
Quick IQ Test
EasyAn 8-question IQ test you can finish in 5 minutes.
8 questions · ~5 min
Classical IQ Test
StandardAn 18-question IQ test in the traditional Wechsler/Binet style.
18 questions · ~15 min
Mensa-Style Practice Test
HardAn 18-question practice test built around Mensa's 130+ IQ qualification threshold.
18 questions · ~20 min
Raven's-Style Matrix Test
StandardA pattern-only, untimed IQ test in the style of Raven's Progressive Matrices.
12 questions · ~15 min
Timed Raven's-Style Test
ExpertThe Raven's-Style matrix test under exam conditions — 60 seconds per question.
12 questions · ~12 min
Culture-Fair IQ Test
StandardA language-neutral IQ test using only pattern and logic questions — no verbal or numerical content.
16 questions · ~18 min
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.Learn More
How Accurate Are Quick IQ Tests? The Science of Short Assessments
Short IQ tests are everywhere online. Here's what the science says about their accuracy and limits.
MathThe Wechsler IQ Test: History, Methodology, and Modern Use
David Wechsler's scale has defined modern IQ testing since 1955. Here's how it actually works.
MathMensa Qualification Guide: Scores, Tests, and How to Join
Mensa accepts members at the 98th percentile. Here's exactly what that means and how to qualify.
MathRaven's Progressive Matrices: The 1936 Test That Still Works
John C. Raven invented his matrix test in 1936. Ninety years later, it's still one of the most-used IQ assessments.
MathCulture-Fair IQ Tests: Measuring Intelligence Across Cultures
Raymond Cattell designed the first culture-fair test in the 1940s. The concept is still important — and still imperfect.
MathEvery IQ Test Type Compared: Mensa, Raven's, Wechsler, and More
Mensa, Wechsler, Raven's, culture-fair: the major IQ tests side-by-side, with the trade-offs explained.
MathHow IQ Scoring Works: The Bell Curve, Z-Scores, and Percentiles
An IQ of 115 means something specific — and it has nothing to do with intelligence being measured directly.
MathThe Flynn Effect: Why Average IQ Scores Have Been Rising for a Century
Average IQ scores have been rising for 100 years. The reason has nothing to do with getting smarter.
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.