How Long Does an IQ Test Take?
Quick Answer
A full professional IQ test, such as the WAIS-IV administered by a psychologist, takes 60–90 minutes. Shorter clinical screeners take 15–30 minutes. Online IQ-style tests typically take 10–30 minutes. Timed sections are part of the measurement — processing speed counts toward your score.
Timing by Test Type
The Wechsler Adult Intelligence Scale (WAIS-IV) — the most widely used clinical test — takes 60 to 90 minutes across its 10 core subtests, plus time for breaks. The Stanford-Binet 5 runs 45 to 75 minutes. The Raven's Progressive Matrices, a nonverbal test, is usually completed in 40–45 minutes.
Mensa's supervised admissions test takes about two hours including instructions and two separate test formats. Brief screeners like the Wonderlic (used in hiring) compress the format to 12 minutes and 50 questions.
Online IQ-style tests, including ours, typically run 10–30 minutes. They estimate the same reasoning domains but cannot replicate the standardized conditions of a supervised assessment — which is why serious decisions should always rely on professional testing.
Why the Time Limit Matters
Time pressure isn't an inconvenience — it's part of what the test measures. Processing speed correlates with general cognitive ability, so most tests either time each section or score faster correct answers higher. Taking an untimed test and a timed test can produce noticeably different scores for the same person.
Frequently Asked Questions
How long is the Mensa test?
The supervised Mensa admissions session takes about two hours, during which candidates sit two different standardized tests. Qualifying on either one (98th percentile) earns membership eligibility.
Can you take breaks during an IQ test?
In professional administration, the psychologist can pause between subtests, and testing is sometimes split across two sessions for children or fatigued examinees. Individual timed subtests cannot be paused.
How long does an online IQ test take?
Most online IQ-style tests take 10–30 minutes. Our free test is 30 questions and takes about 10–15 minutes for most people.
More IQ Questions Answered
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MyIQScores Editorial Team
Researchers in cognitive psychology, psychometrics & educational science
Last updated
May 10, 2026
All content on MyIQScores is reviewed for scientific accuracy against peer-reviewed research in cognitive psychology and psychometrics. Our editorial team cross-references each article with published literature before publication and updates pages whenever new research warrants a revision.