★ 33 ICAR questions · ~10 minutes · No sign-up

Free IQ Test Online
Real Score in 10 Minutes

How smart are you, really?

A research-backed online IQ test built on the ICAR cognitive ability framework — the same open-source items used in peer-reviewed cognitive science research. 33 questions across 4 reasoning domains. Real IQ score with percentile rank. Browser-scored, completely free.

What is an IQ test? ↓

✓ No email, no sign-up ✓ ~10 minutes ✓ Instant IQ score & percentile ✓ Browser-scored, private

IQ Test — discover your real IQ score, brain visualization with cognitive puzzle elements

The Free IQ Test

Take the IQ Test

Take the test in a quiet, focused environment. Each question has one correct answer — pick the one you think fits best. Your first instinct is usually right. See full instructions.

33Questions

~10Minutes

4Domains

You'll be tested on

Abstract Reasoning 6 questions

Verbal Reasoning 4 questions

Numerical Reasoning 3 questions

Spatial Reasoning 20 questions

Background

What is an IQ test?

An IQ test — short for Intelligence Quotient test — is a standardized assessment that measures cognitive abilities like reasoning, problem-solving, pattern recognition, and abstract thinking.

The term "Intelligence Quotient" was coined by German psychologist William Stern in 1912, originally as a ratio of mental age to chronological age. Modern IQ tests, however, are no longer literal quotients — instead, they use statistical norms to place your performance on a bell curve. The population mean is set at 100, with a standard deviation of 15. About 68% of people score between 85 and 115; only about 2% score above 130 (a common Mensa qualifying score).

Most modern IQ tests measure what psychologists call general intelligence, or the g-factor. This is typically broken down into two broad components: fluid intelligence (your ability to reason through novel problems) and crystallized intelligence (your accumulated knowledge, vocabulary, and expertise). Clinical IQ tests like the WAIS-IV (Wechsler Adult Intelligence Scale) and the Stanford-Binet remain the gold standards — but online tests built on the open-source ICAR framework can serve as solid screening tools.

This page hosts a free 33-question IQ test based on ICAR items. It takes about 10 minutes and returns a real IQ score with percentile ranking and a per-domain breakdown. Take the test now, or read on for more about how IQ scoring works.

Why This Test

Why choose this free IQ test?

A credible IQ assessment that respects your time, your privacy, and your intelligence.

Built on the ICAR Framework

Based on the International Cognitive Ability Resource — an open-source, peer-reviewed assessment validated across thousands of participants. Read more.

About 10 Minutes

33 carefully designed questions across 4 cognitive domains. Long enough to be meaningful, short enough to hold your focus.

No Sign-Up Required

Start immediately. No email, no account, no hidden fees. The test runs entirely in your browser — your answers never leave your device.

Instant IQ Score & Percentile

Scored client-side using ICAR normative data. Your IQ score, percentile rank, and domain breakdown appear the moment you finish.

What This IQ Test Measures

Four cognitive domains of intelligence

Each domain captures a distinct facet of general intelligence (the g-factor).

Abstract Reasoning 6 questions

Pattern recognition, logical deduction, and sequence completion. Tests your ability to identify rules and relationships in novel information. This is the strongest single marker of fluid intelligence.

Verbal Reasoning 4 questions

Vocabulary, verbal analogies, and word relationships. Tests your capacity to understand language and reason with verbal information — a marker of crystallized intelligence.

Numerical Reasoning 3 questions

Mathematical problem-solving and quantitative logic. Detect patterns in numerical data, perform mental arithmetic, and apply quantitative reasoning to novel problems.

Spatial Reasoning 20 questions

Visual pattern matrices, mental rotation, and spatial transformation. Manipulate two- and three-dimensional patterns in your mind. The bulk of this test and a strong fluid-intelligence indicator.

IQ Score Chart

IQ score chart: what your score means

The standard WAIS-IV classification system places scores on a bell curve centered at 100. For deeper interpretation, see our full IQ score chart guide.

IQ Range	Classification	Percentile	Description
130+	Very Superior	Top 2%	Mensa-qualifying range. Exceptional cognitive ability — common among researchers and high-level professionals.
120–129	Superior	Top 6–9%	Well above average. People in this range thrive in intellectually demanding fields.
110–119	High Average	Top 16–25%	Above the population mean. Common among university graduates and knowledge workers.
90–109	Average	25th–75th	The broad middle of the bell curve, where roughly half the population falls.
80–89	Low Average	9th–25th	Below the mean but within the normal range.
70–79	Borderline	2nd–9th	Significantly below average. May warrant further evaluation if accompanied by functional challenges.
Below 70	Extremely Low	Bottom 2%	Scores in this range may indicate intellectual disability when accompanied by significant limitations in adaptive functioning.

Best Practices

How to take an IQ test accurately

Test conditions matter as much as the test itself. Follow these four steps for the most accurate result.

Prepare your environment

Find a quiet space free from distractions. Turn off notifications. Take the test when you're well-rested and alert — fatigue can lower your score by 5–10 points.

Use the right device

A tablet or laptop is best — spatial reasoning matrices benefit from a larger screen. Phones work too, but visual detail is easier on bigger displays.

Trust your first instinct

On pattern-recognition tasks, your initial answer is usually correct. If you're stuck after 20 seconds on a single question, mark your best guess and move on.

Interpret your score as a range

Your overall IQ is the headline, but the domain breakdown is the real story. Treat the number as ±5–10 points — not a precise verdict on your intelligence.

Looking for an IQ test for kids? Children's cognitive development requires age-appropriate norms. See our IQ test for kids guide with tests calibrated by age.

★ Global IQ Data

Average IQ by Country

Based on data from over 1.39 million test takers worldwide. The population-weighted global average is 100.

Updated: January 1, 2026 Data source: RankingRoyals

Cross-country IQ comparisons have well-documented methodological limitations — test cultural bias, the Flynn Effect, and large within-country variation all matter. Read our full guide on IQ by country for the complete context.

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FAQ

IQ test FAQ — common questions

Everything you might want to know about this free IQ test, how it works, and what your score means.

What is an IQ test?+

An IQ test (Intelligence Quotient test) is a standardized assessment that measures cognitive abilities — your capacity for reasoning, problem-solving, pattern recognition, and abstract thinking. Modern IQ tests use statistical norms to place your performance on a bell curve centered at 100. About 68% of the population scores between 85 and 115.

How accurate is this free IQ test?+

This test is based on items from the ICAR (International Cognitive Ability Resource), a peer-reviewed open-source framework that correlates strongly with gold-standard clinical measures like the WAIS-IV (r = 0.70–0.85). It's a credible screening tool for personal reflection, but no online test fully replaces a one-on-one clinical assessment by a licensed psychologist. Expect ±5–10 points of variability based on conditions.

How long does the IQ test take?+

Most people complete the 33 questions in about 8–12 minutes. There's no strict time limit, so you can work at your own pace. That said, your first instinct is usually your best — overthinking tends to hurt more than help on pattern-recognition tasks.

Is this IQ test really free?+

Yes — completely free. No email, no sign-up, no hidden fees, no paywalled results. You take the test, you see your score and domain breakdown. We believe access to a credible cognitive assessment shouldn't require a credit card.

How to take an IQ test accurately?+

Take the test when you're well-rested and alert, in a quiet environment free from distractions. Don't rush, but don't agonize over any single question — if you're stuck, make your best guess and move on. Avoid taking the test after a heavy meal or late at night. Use a tablet or laptop for the best experience with spatial reasoning matrices.

What does my IQ score mean?+

Your IQ score tells you where you fall on a bell curve relative to the general population. A score of 100 is average. About 68% of people score between 85 and 115. Scores above 130 place you in roughly the top 2% — the typical Mensa qualifying threshold. The score reflects your performance on specific cognitive tasks, not your worth as a person.

What is a good IQ test score?+

A score of 100 is perfectly average, and most people fall between 85 and 115. Scores above 120 are considered superior and place you in roughly the top 10% of the population. Mensa requires a score in the top 2% (typically 130+ on most scales) for membership. But fixating on a single number misses the point — your cognitive profile across domains is often more informative than the overall figure.

Where can I take an IQ test?+

You can take a free, research-backed IQ test right here on this page. For a formal clinical IQ assessment used for diagnostic or admissions purposes, you'll need to see a licensed psychologist who administers tests like the WAIS-IV or Stanford-Binet. These typically cost $200–$500 and take 60–90 minutes one-on-one.

Are online IQ tests accurate?+

Quality varies enormously. Tests built on peer-reviewed frameworks like ICAR or WAIS-derived items can be quite accurate as screening tools (correlations of r = 0.70–0.85 with clinical measures). Clickbait tests with sensational marketing usually aren't. The biggest accuracy threat isn't the test itself — it's the test conditions (fatigue, distractions, screen size, anxiety).

What does an IQ test measure?+

Modern IQ tests measure general cognitive ability — what psychologists call 'g' or the g-factor. This is typically broken down into fluid intelligence (reasoning through novel problems) and crystallized intelligence (accumulated knowledge). Our test measures four sub-domains: abstract reasoning, verbal reasoning, numerical reasoning, and spatial reasoning.

What cognitive domains does this IQ test cover?+

Four domains: Abstract Reasoning (6 items — pattern recognition and logical sequences), Verbal Reasoning (4 items — vocabulary and word relationships), Numerical Reasoning (3 items — math and quantitative logic), and Spatial Reasoning (20 items — visual matrices and pattern matrices). Together, these provide a well-rounded picture of general cognitive ability.

How is the IQ test scored?+

Each of the 33 questions has one correct answer. Your raw score per domain is converted to an IQ-scale T-score using ICAR normative data — a scale with a mean of 100 and a standard deviation of 15. Your overall IQ is the average of your four domain T-scores. You also see a percentile rank and a band classification.

Do I need to sign up or give my email?+

No. You can start the test immediately without providing an email address, creating an account, or filling in any form. We designed the experience to get you to the first question as quickly as possible — because the test itself should be the focus, not an onboarding funnel.

Can I take this IQ test on my phone?+

Yes. The test is fully responsive and works well on smartphones and tablets. All tap targets are designed for mobile use. That said, some spatial reasoning matrices involve visual detail that benefits from a larger screen, so a tablet or laptop may give you a slightly better experience.

Can I retake the IQ test?+

You can, though keep in mind that familiarity with the items may inflate your score on subsequent attempts. For the most accurate result, treat your first attempt as the definitive one. If you do retake, allow at least a few months so the specific items feel less familiar.

How does this compare to WAIS-IV or Stanford-Binet?+

Clinical tests like the WAIS-IV (Wechsler Adult Intelligence Scale) and the Stanford-Binet are administered one-on-one by a trained psychologist and take 60–90 minutes. They remain the gold standard for clinical and diagnostic purposes. This test uses peer-reviewed ICAR items that correlate well with these measures, making it a solid screening tool — but it doesn't replace the depth or professional interpretation of a full clinical assessment.

What is the highest IQ ever recorded?+

Several people have been credited with extraordinarily high IQs — Terence Tao (~230), Marilyn vos Savant (228, listed in Guinness records for years), Christopher Hirata (~225), and historical figures like William James Sidis (estimated 250–300, though retrospective estimates are unreliable). At the top end of the scale, scores become statistically noisy and are best interpreted with caution.

Can IQ change over time?+

Yes, though the degree of change is bounded. Fluid intelligence tends to peak in your mid-twenties and gradually decline, while crystallized intelligence (accumulated knowledge, vocabulary, expertise) typically grows throughout adulthood. Education, enriched environments, and consistent cognitive challenge can produce meaningful gains in measured IQ.

Is IQ the same as intelligence?+

Not exactly. IQ tests measure a specific set of cognitive abilities — reasoning, pattern recognition, working memory — what psychologists call 'g' or general intelligence. But human intelligence is broader than any single number can capture. Creativity, emotional insight, practical wisdom, and social understanding all matter enormously and aren't well measured by traditional IQ tests.

What happens to my IQ test data?+

Your test is scored entirely in your browser — your answers are not sent to any server. We don't collect your name, email, or any personally identifiable information. We take a minimalist approach to data: if we don't need it, we don't ask for it, and we don't store it.

Educational tool, not clinical assessment

This is an educational screening tool for personal reflection — not a clinical IQ assessment. Factors like fatigue, test anxiety, screen size, language background, and practice effects can all shift your score by 5–10 points or more. Standardized clinical tests like the WAIS-IV and Stanford-Binet must be administered by a licensed psychologist. If you need a formal evaluation, consult a qualified professional. Based on the ICAR framework (Condon & Revelle, 2014).

Free IQ Test Online
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Score breakdown by cognitive domain

What is an IQ test?