Logical Reasoning
Spotting patterns and abstract relationships without leaning on anything you already learned.
Fluid reasoning
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IQ Testing
Free IQ Test With Instant Results, No Email Required
Take a free IQ test with instant results. 39 questions across five cognitive domains, scored the moment you finish, with your percentile and a breakdown of where you are strongest.
39 questions
~13 minutes
5 domains
Age-normed
Free score. No payment to see your number. No account setup.
IQ Distribution
Scored instantly
Where do you land?
Everyone sits somewhere on this curve. 39 questions across five domains tells you exactly where, with your percentile attached.
LogicVerbalSpatialMemorySpeed
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Free score. About 13 minutes. No email required.
ICAR-style validated items
r = 0.70 to 0.85 vs WAIS-IV
Scored in under 1 second
Mean 100, SD 15 scale
Encrypted, GDPR compliant
What You Get
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This Is Your Result Screen, 13 Minutes From Now
Most free IQ tests hand you one number and a share button. You get a number, a percentile, and a map of which kinds of thinking you are actually good at.
Your score on the standard scale
Mean of 100, standard deviation of 15. The same shape every major IQ scale uses, including the WAIS-IV.
Your percentile against your age group
A raw number means little on its own. The percentile tells you how many people you outperformed.
Five domain scores, not one flat number
See whether your strength is logic, language, space, memory or speed. That is the part people act on.
Scored in 0.4s
Age-normed
Complete
Sample result
39 of 39 answered
0
IQ Score
Where this score falls on the population distribution
Full written report
Career alignment, domain-by-domain analysis, your certificate and a PDF you keep. A one-time $9.99, never required to see your score.
The Five Domains
What the Test Actually Measures
A proper IQ test does not check how much you know. It checks how efficiently you reason with information you have never seen before, across five separate abilities.
Verbal Reasoning
Understanding language and drawing sound conclusions from written information.
CrystallisedSpatial Reasoning
Rotating, folding and comparing visual information inside your head.
Visual-spatialWorking Memory
Holding several pieces of information in mind and manipulating them in real time.
Short-term storeProcessing Speed
How fast and how accurately you work under mild time pressure.
Mental efficiency
Find out which of the five is your strongest.
39 questions. About 13 minutes. Your breakdown appears the moment you submit.
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Choose Carefully
How to Choose a Free IQ Test With Instant Results You Can Trust
The American Psychological Association defines an intelligence test as an instrument standardised against a representative sample. That single standard rules out most of what ranks for this search.
The four traps
One domain only, usually pattern matching, sold as a full IQ test.
Flattering scores engineered for social sharing, not accuracy.
A paywall on the score itself, after you already did the work.
Unvalidated questions with no measured link to cognitive ability.
What MindAura does instead
Five domains measured separately, then combined into one score.
ICAR-style items from a peer-reviewed, open research item bank.
Your score and percentile are free. The optional report is the paid part.
Age-normed scoring on the standard mean 100, SD 15 scale.
0.70–0.85
Correlation with the WAIS-IV
Research on ICAR-based item banks against the clinical gold standard reports r in this range (Young & Keith, 2020).
60–90
Minutes for a WAIS-IV
A psychologist administers it one-on-one, normed on roughly 2,200 US adults. No online test replaces it for diagnosis.
±5
Points of true-score range
Your real score sits inside a band, not on a pinpoint. That is true of clinical tests too.
13
Minutes for this test
Long enough to cover five domains properly. Anything under 8 minutes cannot.
You have read the methodology. Now see your number.
Free score, free percentile, free domain breakdown.
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Score Explorer
What Would Your Score Actually Mean?
Drag the slider to any IQ score and see the classification, the percentile, and how many people out of 100 you would be ahead of.
118
IQ score
High Average
Ahead of 88 people out of 100
557085100115130145
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Percentiles use the standard normal model with a mean of 100 and a standard deviation of 15.
Score Ranges
IQ Classification Table
How IQ scores are categorised using the standard WAIS-IV system. Every major scale is built around a mean of 100 and a standard deviation of 15.
Range
Classification
Percentile
Description
130+
Very Superior / Gifted
Top 2%
Exceptional cognitive ability. People in this range tend to excel in abstract reasoning, complex problem-solving, and academic pursuits.
120–129
Superior
Top 6–9%
Well above average. People in this range often thrive in intellectually demanding fields and pick up new concepts quickly.
110–119
High Average
Top 16–25%
Above the population mean but not unusually so. Common among university graduates and knowledge-intensive roles.
90–109
Average
25th–75th
The broad middle of the bell curve, where roughly half the population falls. Solid, typical cognitive functioning.
80–89
Low Average
9th–25th
Below the mean but inside the normal range. Abstract or fast-paced tasks may feel harder, everyday function is fine.
70–79
Borderline
2nd–9th
Significantly below average. May warrant further evaluation by a clinical psychologist if paired with functional challenges.
Below 70
Extremely Low
Bottom 2%
May suggest intellectual disability when accompanied by significant limits in adaptive functioning. A clinical assessment is essential for any diagnosis.
Which row is yours?
39 questions is all it takes to find out. Your score is free.
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The Research
Numbers Worth Knowing Before You Start
A century of intelligence research in five figures. Each one is sourced below.
0Alfred Binet built the first practical intelligence test
0Flynn Effect gain per decade through the 20th century
0Correlation between cognitive ability and job performance
0Of people score between 85 and 115
0Upper estimate of adult IQ heritability from twin studies
Before You Start
Six Ways to Get Your Most Accurate Score
Your state on the day moves your score by 5 to 10 points. These six steps cost nothing and protect your result.
1
Sleep 7 to 9 hours first
Working memory drops by up to 20% after one bad night.
2
Test between 9am and noon
Cognitive performance peaks in the morning for most adults.
3
Eat about 2 hours before
Do not test on an empty stomach. Glucose matters for sustained attention.
4
Close every other tab
Silence your phone. Interruptions hit processing speed hardest.
5
Skip it if you are stressed
Cortisol directly impairs working memory. Come back tomorrow instead.
6
Take it once, seriously
Retesting inflates scores through familiarity, not real improvement.
Rested, quiet room, 15 free minutes?
That is the whole checklist. Start now while conditions are good.
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Context
Where the IQ Test Came From, and What It Predicts
A century of work sits behind the number you are about to get. Here is the short version, and the honest limits that come with it.
-
1905
Binet builds the first test
Alfred Binet and Théodore Simon create the first practical intelligence test in France. The goal was never to rank the gifted. It was to find children who needed extra help at school.
-
1916
The Stanford-Binet arrives
Lewis Terman adapts Binet's scale for American use and introduces the intelligence quotient formula. Testing spreads fast, and so does the habit of reading one number as a verdict.
-
1939
Wechsler splits it up
David Wechsler argues intelligence is not one number but a profile of distinct abilities. His scales measure several domains separately. The WAIS-IV still works this way today.
-
Today
Five domains, scored instantly
Wechsler's argument is exactly why a credible free IQ test measures several domains instead of one narrow skill. Mindaura scores five of them in about 13 minutes.
A field with a difficult historyIQ testing has been misused, including in early-20th-century eugenics policy. Modern test developers and psychologists are explicit about where the line sits. A score describes a set of cognitive skills at one moment in time. It does not describe a person's worth.
r = 0.51
Does a Free IQ Test With Instant Results Predict Career Success?
Yes, but it is not destiny.
Cognitive ability is one of the most studied predictors in industrial psychology. Large meta-analyses put its correlation with job performance at about r = 0.51 across occupations, stronger than years of experience or education alone (Schmidt & Hunter, reviewed in Frontiers in Psychology, 2019). The link is strongest in complex roles. Conscientiousness, social skill and plain persistence still move outcomes on their own, which is why two people with the same score can end up on very different paths.
50 to 80%
Is intelligence nature or nurture?
Both, and the mix shifts with age.
Twin and adoption studies put genetic factors at roughly 50 to 80 percent of the variation in adult IQ (Bouchard & McGue research tradition, ScienceDirect, 2021). That range describes variation across a whole population. It does not say how much of any one person's intelligence came from genes. Heritability also rises with age. Shared family environment matters most in childhood and fades substantially by someone's twenties, likely because adults increasingly choose environments that fit their own abilities.
+3 pts a decade
Why have average scores risen?
Better schooling, not better brains.
Raw scores rose by about 3 points per decade across most of the 20th century. The pattern is called the Flynn Effect, and publishers re-norm their scales to keep the average pinned at 100. The gains landed in fluid reasoning rather than vocabulary, which points to more schooling, better nutrition and more practice with abstract formats. In several developed countries the trend has slowed or reversed since the 1990s (Bratsberg & Rogeberg, 2018, PNAS).
A hundred years of research, and one number still missing.
Yours. Five domains, about 13 minutes, free to see.
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Reasons
Why Take a Free IQ Test With Instant Results?
Four reasons people give most often, and what each one actually gets you.
Curiosity
You want the number. Seeing where you actually sit on the distribution settles a question most people carry around for years.
Career insight
Your domain breakdown shows how you solve problems. Pair it with a career aptitude test for a fuller picture.
Personal growth
Five scores instead of one tell you which kind of reasoning to work on, and which is already a strength you can lean on.
A baseline to measure against
If you are preparing for official testing, one honest baseline beats guessing. Take it once, seriously, and keep the result.
Famous IQs
Notable IQ Scores Throughout History
Estimated and tested scores of well-known people. None came from a supervised, standardised administration, so treat them as popular estimates rather than clinical fact.
1
Often called the greatest living mathematician. He was solving university-level problems at nine and won the Fields Medal in 2006.
2
Listed in the Guinness Book of World Records for the highest recorded IQ, known for her "Ask Marilyn" column.
3
Won gold at the International Physics Olympiad at 13 and was working with NASA on Mars projects by 16.
4
Retrospective estimates place him between 180 and 220. His notebooks span anatomy, engineering, painting and flight.
5
Entered the Guinness Book as the highest-IQ child. He was auditing university physics classes at three.
6
Widely regarded as the greatest chess player of all time. He became undisputed World Champion at 22.
7
He never took a modern IQ test. Experts estimate around 160 based on his work in relativity and quantum mechanics.
8
Hawking said people who boast about their IQ are losers. His own estimated score still sits in rare territory.
For the research behind the best-documented cases, see famous people and their IQ scores.
What Costs What
Your Score Is Free. Here Is What Is Not.
No paywall sits between you and your number. The written report is the optional part, it costs $9.99 once, and nothing renews.
The test
$0
No card. No account setup.
- All 39 questions, all 5 domains
- Your IQ score on the standard scale
- Your percentile and classification
- Per-domain score breakdown
- Written report and certificate
One-time payment
Full Report + Certificate
$9.99once
One payment. No subscription, no renewal, nothing to cancel.
- Everything in the free test
- Full written cognitive report
- Personalised IQ certificate with your score
- Career alignment based on your profile
- PDF download you keep forever
You see your score first. The report is offered after, never before.
Educational tool, not a clinical assessment
Fatigue, test anxiety, screen size, language background and practice effects can each shift your score by 5 to 10 points or more. A clinical assessment controls for these factors. An online test cannot. Read your result as an approximate range, not a precise measurement. If you need a formal evaluation, consult a licensed psychologist.
Questions
Frequently Asked Questions
The things people ask right before they start.
Taking the test
Yes. Scoring happens the moment you submit your final answer, with no manual review and no waiting. You enter your name and email on the results step, which is how your report is delivered and saved so you can return to it later.
39, spread across five cognitive domains. Most people finish in about 13 minutes, at roughly three questions a minute. There is no strict countdown, so you can take the time you need on each item rather than racing the clock.
A test under 8 to 10 minutes cannot reliably assess multiple cognitive domains. A proper online test takes 10 to 15 minutes. A clinical assessment like the WAIS-IV runs 60 to 90 minutes because it is administered one-on-one by a psychologist.
Five: logical reasoning, verbal reasoning, spatial reasoning, working memory and processing speed. Many free tests cover only one, usually pattern recognition. Measuring five domains is what lets your report show where you are strongest instead of giving you a single flat number.
Each question has one correct answer. Your raw score is converted onto the standard IQ scale, where 100 is the average and 15 points is one standard deviation. You also get a per-domain breakdown, so you can see which kinds of reasoning you handled best.
Yes. You can answer all 39 questions without signing up, but results are delivered after you enter your name and email. There is no password or account setup step. If you would rather not share an email, the classification table on this page lets you interpret any score without taking the test.
They are stored against the email you provide so you can revisit your report and track changes over time. Individual answers are not published, and results are only reported in aggregate. See the Mindaura privacy policy for the full detail.
Yes. The test runs in any modern mobile browser and the layout adapts to small screens. A larger screen can help on the spatial reasoning questions, where you compare shapes side by side, so use a tablet or desktop if one is handy.
Find a quiet place, make sure you are rested, and set aside about 15 uninterrupted minutes. Work at a steady pace and make your best guess rather than stalling on a hard item. You can start the test directly on this page without leaving for another site.
You can, but repeated testing inflates scores through item familiarity rather than genuine ability change. Treat your first serious attempt as the most meaningful one. If you do compare two attempts, leave a decent gap between them.
The score itself is free, along with your percentile and your five-domain breakdown. The full written report costs $9.99 as a one-time payment. It includes career alignment, a domain-by-domain analysis and a personalised IQ certificate with your score. There is no subscription and nothing renews. Nothing about the test questions themselves is held back.
Understanding your score
100, by definition. IQ scales are re-normed periodically so the population mean stays at 100 with a standard deviation of 15. That means about 68% of people score between 85 and 115, and roughly 95% score between 70 and 130.
Any score above 100 is above average. 115 places you in the top 16%. 130 places you in the top 2.1%. Most people land between 85 and 115, which is the broad middle of the bell curve rather than a weak result.
Your score tells you where you fall on a bell curve relative to the general population. It is a percentile, not a measure of worth or potential. Your true score also sits within a margin of roughly 5 points either side of the number shown.
The WAIS-IV system uses these bands: 130 and above is Very Superior, 120 to 129 Superior, 110 to 119 High Average, 90 to 109 Average, 80 to 89 Low Average, 70 to 79 Borderline, and below 70 Extremely Low. The full percentile breakdown is in the classification table above.
Intelligence Quotient. The term originally described a ratio of mental age to chronological age. Modern tests instead compare your performance to a large normative sample, so the word quotient is now historical rather than literal.
Not exactly. IQ measures a specific set of reasoning and pattern-recognition abilities. Broader human intelligence includes creativity, emotional insight, and practical judgment that a test score does not capture. Two people with identical scores can lead very different lives.
The science behind the test
An IQ test is a standardised assessment of reasoning ability. It measures how efficiently you solve unfamiliar problems, not how much you already know. Scores are set against a normed sample, so your number describes how you compare with other people rather than an absolute level of intelligence.
Well-designed tests with age norming and multi-domain assessment can produce results within 10 to 15 points of professionally administered tests for most people. Accuracy drops sharply for single-domain quizzes. The gap that matters is individual precision, not average accuracy across a population.
Validated free tests built on ICAR-style items correlate with the WAIS-IV at r = 0.70 to 0.85. That is strong for a free test, though it is still not a substitute for clinical diagnosis, school placement, or any decision with legal weight.
ICAR stands for the International Cognitive Ability Resource. It is an open-source, peer-reviewed bank of cognitive test items used widely in academic research. Studies comparing ICAR-based tests against the WAIS-IV report correlations of about r = 0.70 to 0.85, which is why reputable free tests draw on that family of items.
Your score can shift, though the range tends to stay stable. Fluid intelligence, meaning your ability to solve novel problems quickly, peaks in your twenties and declines slowly after that. Crystallised intelligence, meaning vocabulary and accumulated knowledge, often keeps rising into your sixties.
Twin and adoption studies put adult heritability at roughly 50 to 80 percent, with the figure rising with age. Environment still matters, particularly earlier in life. That range describes variation across a population, not how much of one person's intelligence came from genes.
This is the Flynn Effect, roughly 3 points per decade across the 20th century, largely from schooling, nutrition, and growing familiarity with abstract test formats. Tests are periodically re-normed to keep pace. In several developed countries the trend has slowed or reversed since the 1990s.
No, but it correlates meaningfully with job performance at roughly r = 0.51 in large meta-analyses. Conscientiousness and social skill add substantial predictive power on top of raw cognitive ability. IQ can open doors, but it does not walk through them for you.
Alfred Binet, in 1905, working with Théodore Simon. The original purpose was to identify French schoolchildren who needed extra academic support, not to rank the gifted. Lewis Terman later adapted it for American use as the Stanford-Binet in 1916.
Last Step
See Your Real Score in 13 Minutes
39 questions. Five cognitive domains. Your score, percentile and domain breakdown appear the second you finish.
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Learn More
IQ Guide Hub
Everything you need to understand IQ scores, testing, and what the research says.
What Is My IQ?Take a free test and find out where you stand on the IQ scale.
IQ Score ChartWhat each score range means and where you fall on the distribution.
What Does My Score Mean?Score-by-score breakdown from 70 to 150, with percentile and band.
How IQ Tests WorkThe science behind cognitive assessment, from Binet to modern methods.
Are Online Tests Accurate?What separates credible tests from clickbait, with ICAR validation data.
Average IQ by AgeHow fluid and crystallised intelligence change across the lifespan.
Practice IQ QuestionsTry sample questions with explanations before taking the full test.
Mensa IQ Test GuideQualifying scores, test formats, and what Mensa membership means.