Free IQ Test
Science-based cognitive ability assessment
Measure your IQ across four reasoning domains with timed questions and visual matrix patterns. Based on the ICAR framework — free, private, instant results.
75 questions · 25 min · free & anonymous
ICAR Framework
Based on the International Cognitive Ability Resource, a peer-reviewed, open-source battery validated across large global samples.
25 Minutes, Timed
75 questions with a 25-minute time limit. Speed is part of cognitive ability measurement, making scores more meaningful.
No Signup Needed
No account, no email required. Your answers are scored in your browser. Results are instant and private.
4 Reasoning Domains
Measures abstract, verbal, numerical, and spatial reasoning — the core components of general cognitive ability (g factor).
Three Steps to Your IQ Score
A timed, multi-domain cognitive assessment that produces your IQ score instantly.
Start the test
Click Start to begin. The 25-minute timer starts when you answer your first question.
Answer 75 questions
Work through text-based reasoning problems and visual matrix pattern puzzles across all four domains.
Get your IQ score
Receive your IQ score (mean 100, SD 15), domain breakdown, percentile ranking, and personalized insights instantly.
Four Domains of Cognitive Ability
Each domain captures a distinct facet of general intelligence (g factor).
Abstract Reasoning
Pattern recognition, logical sequences, and deductive reasoning with novel problems.
Verbal Reasoning
Vocabulary, verbal analogies, reading comprehension, and logical inference from text.
Numerical Reasoning
Mathematical problem-solving, data interpretation, percentages, and quantitative logic.
Spatial Reasoning
Visual matrix patterns, shape transformations, and spatial relationship recognition.
Frequently Asked Questions
Everything you need to know about this IQ test.
How accurate is this IQ test?
This test uses items from the International Cognitive Ability Resource (ICAR), a peer-reviewed, open-source framework developed at Northwestern University. ICAR items correlate well with established measures like Raven's Progressive Matrices. However, online tests are approximations — standardized tests like WAIS-IV must be administered by a psychologist for clinical-grade accuracy.
Why is the test timed?
Processing speed is a core component of cognitive ability. Timed tests are more valid because they prevent users from looking up answers or spending unlimited time on each question. The 25-minute limit is standard for a 75-item cognitive battery.
What are the visual pattern questions?
These are matrix reasoning items similar to Raven's Progressive Matrices — widely considered the purest measure of fluid intelligence. You see a 3x3 grid of shapes with the bottom-right cell missing and choose which of four options completes the pattern.
What is IQ and what does my score mean?
IQ (Intelligence Quotient) is a standardized score with a mean of 100 and standard deviation of 15. About 68% of people score between 85 and 115. Scores above 130 are considered "Superior" (top 2%), and scores above 145 are "Very Superior" (top 0.1%). IQ measures analytical reasoning but does not capture emotional intelligence, creativity, or practical wisdom.
Can I improve my IQ?
Fluid intelligence (novel problem-solving) is largely genetic but can be modestly improved through targeted cognitive training, regular exercise, quality sleep, and continuous learning. Crystallized intelligence (vocabulary, knowledge) improves throughout life with education and reading.
Do I need to sign up or provide my email?
No. The test is completely free and anonymous. All scoring happens in your browser. You can optionally save your results with a private link for future reference.
This is an online estimation of cognitive ability for personal reflection, not a clinical IQ assessment. Standardized tests (WAIS-IV, Stanford-Binet) must be administered by a licensed psychologist. Online results can be affected by distractions, fatigue, and test conditions. Based on the ICAR framework (Condon & Revelle, 2014).