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ENTRESDERUZHARHIID
IQ test/Full test
COMPLETE ASSESSMENT

Ready to measure your intelligence?

Adaptive difficulty, item-response scoring and age-normed results, in nine languages, free. Four sections, 60 questions, one detailed report.

Logical reasoning (4/15)⏱ 57:42
Which number comes next?
26122030?
A36B40C42D44
60Questions
60:00Time limit
4Domains
THE ROUTE THROUGH THE TEST

Four sections, in this order

Within each section the difficulty adapts to your answers. After every section the clock pauses on a checkpoint screen until you continue.

01⏸ Checkpoint
QUESTIONS 1–15Logical reasoningPattern recognition, sequences and abstract problem-solving.
⇅ Adaptive
02⏸ Checkpoint
QUESTIONS 16–30Spatial intelligenceVisualising objects, mental rotation and mirror images.
⇅ Adaptive
03⏸ Checkpoint
QUESTIONS 31–45Verbal comprehensionAnalogies, word meaning and relationships between ideas.
⇅ Adaptive
04✓ Results
QUESTIONS 46–60Working memoryHolding information in mind and working on it.
⇅ Adaptive
WHAT'S INSIDE

Built like a real assessment, not a quiz

Twelve features across how the test measures you, how it runs, and what you get at the end.

ADAPTIVE DIFFICULTY · TRY ITitem 1 of 8
Every answer moves the next question

Get one right and the next is harder; miss one and it eases off. The test spends its questions near your level, which is why 15 items per domain can place you precisely.

next
Bar height = item difficulty (1–6). Lilac = the next item the test would pick.
MEASUREMENTItem-response scoringEach item has a calibrated difficulty; your score reflects which items you solved, not just the count.
MEASUREMENTAge-normed resultsCompared with people your age as well as all takers, so the score is fair at 18 or 68.
RESULTSPercentile + confidence rangeYour rank among takers, plus the band your true score likely falls in.
RESULTSPer-domain scoresLogical, spatial, verbal and working memory, each on the IQ scale.
EXPERIENCE9 languages, localised itemsQuestions and instructions in English, Arabic, German, Spanish, Hindi, Indonesian, Russian, Turkish and Chinese, with verbal items written for each language.
EXPERIENCESection breaks, clock pausedThree checkpoints where the timer stops until you continue.
INTEGRITYAnti-cheat checksTab switches and implausible response timings are flagged so results stay comparable.
RESULTSDetailed PDF reportA full breakdown emailed to you: scores, strengths and what they mean.
RESULTSPermanent result linkEvery result gets its own permanent link. No account needed: bookmark it, share it, come back any time.
RESULTSCompare by country and ageSee where you sit against takers from your country and age group.
RESULTSCertificateA shareable certificate with your score and test date.
MEASUREMENTPrecise with 60 itemsAdaptive selection plus calibration gives a tighter estimate than a fixed test of the same length.
SUCCESS TIPS

Five habits that protect your score

None of these make you smarter. They stop avoidable mistakes from pulling the number below what you can actually do.

  1. 01Read each question carefully before answeringMost wrong answers on easy items come from misreading the rule, not from not knowing it.
  2. 02Trust your first instinct when unsureIf two options still look right after a careful look, your first pick is usually the better guess.
  3. 03Manage your time across all sectionsSixty minutes for sixty items is about a minute each. Don't let one hard item eat five.
  4. 04Take breaks between sections if neededThe clock pauses on each checkpoint. Use it, rather than drifting mid-section.
  5. 05Stay focused and avoid distractionsSilence notifications and close other tabs. Interruptions hit working memory hardest.
WHY THIS ONE

The most complete free IQ test online

The full IQ test is a free online intelligence assessment of 60 questions in four sections of 15: logical reasoning, spatial intelligence, verbal comprehension and working memory. It has a 60-minute limit, scores harder items more heavily, and reports an overall IQ on the standard scale (mean 100, standard deviation 15) with a percentile and a separate score for each domain.

Typical online IQ quizThis test
Same fixed questions for everyoneAdaptive: every answer picks the next item
Score = number correctItem-response scoring on calibrated items
One number, no contextOverall IQ + 4 domain scores + percentile + range
Compared with nobody in particularAge-normed, with country and age comparisons
English only9 languages with localised verbal items
Easy to gameTab-switch and timing checks
Result page, then gonePermanent result link, PDF report and certificate
WHAT IT MEASURES

Four cognitive domains, 15 questions each

The four areas mirror the broad abilities that most modern intelligence batteries separate. Pick one to see what it covers, what the items look like and where the skill shows up outside a test.

SECTION 1 · QUESTIONS 1–15

Logical reasoning

Logical reasoning is the ability to find the rule behind a set of examples and apply it to a new case. It is the closest of the four to what psychologists call fluid reasoning: solving problems you haven't seen before, without relying on learned facts.

ITEM TYPES IN THIS SECTION
●Number sequences with one or more hidden rules●Rules that alternate or compound (e.g. ×2 then +1)●Series where the step itself follows a pattern
WHERE IT SHOWS UP

Debugging code, spotting a trend in data, working out the rules of a new game, and most mathematical problem-solving lean on this skill.

HOW IT GETS HARDER

Early items use a single constant step. Later items combine two rules, use growing gaps, or interleave two sequences in one.

Comparable clinical subtests: WAIS-IV Matrix Reasoning, Figure Weights; Raven's Progressive Matrices.
HOW THE SCORE IS CALCULATED

From 60 answers to one IQ number, in four steps

Full methodology →
  1. 01

    Score each answer

    Each response is marked right or wrong. Working-memory answers must match the whole sequence exactly.

  2. 02

    Adapt and calibrate

    Items are chosen adaptively, and each has a calibrated difficulty. Item-response scoring estimates your ability from which items you got right, not just how many.

  3. 03

    Compare with other takers

    Each section's weighted score is compared with the distribution of scores from other takers to place you on that domain.

  4. 04

    Convert to the IQ scale

    Domain positions are combined and expressed on the standard scale: mean 100, SD 15, with a percentile and likely range.

Why the result is a range, not a single point

Every test has measurement error. Even the WAIS-IV, given one-to-one by a psychologist, reports a 95% confidence interval of roughly ±5 points around the full-scale IQ. A shorter, unsupervised online test should be read with at least that much margin, so the result page shows a likely range alongside the number.

How IQ scores work →
READING YOUR RESULT

What each score range means

Bands follow the Wechsler-style labels used on this site's result page. Shares are the proportion of a normal distribution with mean 100 and SD 15. Select a band for its score guide.

130+Very superior
2.3%120–129Superior
6.8%110–119High average
16.1%90–109Average
49.5%80–89Low average
16.1%70–79Borderline
6.8%Below 70Extremely low
2.3%
FULL, QUICK OR PRACTICE

How the full test compares with the shorter versions

Full testQuick testPractice test
Questions60Fewer, mixedExample items
Time60-minute limitShortNo limit
Domains scoredAll 4, separatelyOverall onlyNone
ResultIQ, percentile, range, breakdownRough estimateExplanations only
Best forYour most reliable estimateA quick first lookLearning the formats
Margin of errorSmallest: adaptive + IRTWiderNot scored
Adaptive difficultyYes, within each section—No
ReportPDF, permanent link, certificateSummary—

Sources and further reading

Reviewed by the What's Your IQ. Methodology
  1. Wechsler, D. (2008). Wechsler Adult Intelligence Scale – Fourth Edition (WAIS-IV): Technical and Interpretive Manual. Pearson.
  2. Embretson, S. E., & Reise, S. P. (2000). Item Response Theory for Psychologists. Lawrence Erlbaum.
  3. McGrew, K. S. (2009). CHC theory and the human cognitive abilities project. Intelligence, 37(1), 1–10.
  4. Hartshorne, J. K., & Germine, L. T. (2015). When does cognitive functioning peak? Psychological Science, 26(4), 433–443.
  5. Scharfen, J., Peters, J. M., & Holling, H. (2018). Retest effects in cognitive ability tests: A meta-analysis. Intelligence, 67, 44–66.
60:00

60 questions. One free result.

Overall IQ, percentile and four domain scores. The clock pauses between sections.