How long does an IQ test take?

Short answer: A full clinical IQ test given by a psychologist takes about 45 to 90 minutes of testing. For the WAIS-5, Pearson lists 45 minutes for the Full Scale IQ, and 60 to 90 minutes for the core subtests of the older WAIS-IV (Pearson product pages, read 20 October 2026). Brief tests such as the WASI-II take 15 to 30 minutes (Pearson), and the American Mensa admission test takes one to two hours (American Mensa). A full evaluation at a clinic takes much longer: several hours, with results a few weeks later (OHSU and Henry Ford Health clinic pages). Columbia Neurology says longer evaluations are sometimes divided into several appointments, and ColumbiaDoctors' children's service usually spreads testing over two to three days (clinic pages, read 20 October 2026).

Time by test

These are the testing times each publisher or organization states for its own test, read on 20 October 2026. They cover the test itself, not the whole appointment.

• WAIS-5 (adults, ages 16 to 90): 45 minutes for the 7-subtest Full Scale IQ, and 60 minutes for the 10 subtests behind the five primary index scores (Pearson).
• WAIS-IV (the previous adult edition, 2008): 60 to 90 minutes for the core subtests (Pearson).
• WISC-V (children, ages 6 to 16): about 60 minutes for the core subtests (Pearson).
• WPPSI-IV (young children, ages 2 years 6 months to 7 years 7 months): 30 to 45 minutes for ages 2 years 6 months to 3 years 11 months, and 45 to 60 minutes for ages 4 to 7 (Pearson).
• Stanford-Binet 5 (ages 2 to 85 and over): about 5 minutes for each of its 10 subtests (PRO-ED), so about 50 minutes for the full battery by our calculation.
• WASI-II (a brief test, ages 6 to 90): 30 minutes for the four-subtest form and 15 minutes for the two-subtest form (Pearson).
• Raven's Progressive Matrices, classic edition: untimed, with typical times of 20 to 45 minutes for the Standard Progressive Matrices and 40 to 60 minutes for the Advanced Progressive Matrices, in a brochure from Pearson.
• American Mensa Admission Test: one to two hours (American Mensa).
• A full neuropsychological evaluation: 3 to 5 or more hours for the whole evaluation at OHSU's adult clinic, and 2 to 8 hours of testing at Henry Ford Health, which also lists a separate 1-hour intake for adults (clinic pages).

Testing time is not appointment time

The figures above are what publishers call completion or administration time. That is the time the examiner spends giving the subtests. The visit around it is longer.

A clinical IQ test is usually one part of a psychological or neuropsychological evaluation. The American Psychological Association describes an assessment as something that can combine norm-referenced tests, interviews, records and observation, chosen to answer a specific question (APA, updated August 2022). Clinics describe the process in steps:

1. Intake. A first talk about the reason for testing and your history. Henry Ford Health lists a 1-hour intake for adults, and ColumbiaDoctors' children's service says its intake "usually takes one-to-two hours" (clinic pages, read 20 October 2026).
2. Testing. The IQ test plus any other tests the question calls for, such as memory, attention or academic skills.
3. Scoring and report. OHSU says that after you leave, the neuropsychologist scores the tests, reviews the chart and writes a report (OHSU, read 20 October 2026).
4. Feedback. A meeting to go over the results and recommendations.

How long it takes depends on which of these you mean. If someone asks you to sit a WAIS-5 and nothing else, plan on about an hour of testing plus time for instructions and breaks. If you have been referred for an evaluation, plan on most of a day, or more than one day.

The WAIS-5 and Stanford-Binet 5 for adults

The WAIS-5 is Pearson's current adult Wechsler test, published in 2024. Pearson lists "45 minutes for the 7-subtest FSIQ; 60 minutes for the 10 primary index subtests" on its product page (read 20 October 2026). FSIQ means Full Scale IQ, the overall score. The primary index scores are the five domain scores, such as working memory and processing speed. Our guide to the WAIS IQ test explains what each part measures.

The WAIS-5 FAQ on Pearson's page says the Full Scale IQ "can be obtained about 20 minutes faster" than on the WAIS-IV, and that the primary index subtests take about 10 minutes less (Pearson, read 20 October 2026). The same FAQ says "administration time is determined by the composite scores desired". In practice, the examiner decides which scores the question needs, and the time follows from that choice. The WAIS-5 also has ten secondary subtests, and Pearson notes that giving them makes testing "somewhat longer".

Some clinics still use the WAIS-IV, published in 2008. Pearson lists its completion time as "60-90 minutes for core subtests" (read 20 October 2026). If your appointment letter names the WAIS-IV, that is the better figure to plan around.

PRO-ED, the publisher of the Stanford-Binet 5, lists it for ages 2 to 85 and over, so adults take it too. PRO-ED gives the testing time as "Approximately 5 minutes for each of 10 subtests" (read 20 October 2026). By our calculation, the full battery takes about 50 minutes before breaks. PRO-ED does not print a separate time for the short version, called the Abbreviated Battery IQ, which uses two of the ten subtests. Our guide to the Stanford-Binet test covers how it is given and scored.

Children: WISC-V and WPPSI-IV

For children aged 6 to 16, the usual Wechsler test is the WISC-V, published in 2014. Pearson lists "Core subtests: ~60 minutes" (read 20 October 2026). Its Full Scale IQ comes from seven subtests. A sixth edition is in progress: Pearson Canada is recruiting children for a WISC 6 Canadian standardization study, but the US store still sells the WISC-V (read 20 October 2026).

For younger children, Pearson's WPPSI-IV covers ages 2 years 6 months to 7 years 7 months. Pearson gives 30 to 45 minutes for the core subtests at ages 2 years 6 months to 3 years 11 months, and 45 to 60 minutes at ages 4 to 7 (read 20 October 2026).

A school or clinic evaluation for a child usually covers more than IQ. ColumbiaDoctors' children's neuropsychology service says testing "usually occurs over the span of two to three days", and its sample schedule shows testing days of 3 to 6 hours each, with breaks and a 1-hour lunch (read 20 October 2026). Henry Ford Health says "A neuropsychological evaluation may take between two to eight hours, depending on your child's age and tolerance of the testing process" (read 20 October 2026). If your child's school or doctor has asked for testing, ask the psychologist what the evaluation will include and how it will be split. Only a qualified professional can explain what a child's results mean.

Brief tests: WASI-II and Raven's

Some tests are built to be short. Pearson's WASI-II gives an IQ estimate from fewer subtests, and its product page lists "Four-subtest form, 30 minutes; Two-subtest form, 15 minutes" (read 20 October 2026).

Raven's Progressive Matrices is a test made only of picture puzzles: each one is a grid of shapes with a piece missing, and you choose the piece that completes the pattern. Pearson's brochure for the classic edition describes it as "Untimed, individual or group". It gives typical times of 15 to 30 minutes for the Coloured Progressive Matrices (for children), 20 to 45 minutes for the Standard Progressive Matrices and 40 to 60 minutes for the Advanced Progressive Matrices, in the same brochure (read 20 October 2026). Pearson's Raven's 2 flyer says the newer edition can also be given under timed conditions. Neither Pearson page we could read on 20 October 2026 states a completion time for Raven's 2. Our guide to Raven's Progressive Matrices explains the test in more detail.

Untimed does not mean everyone finishes at the same pace. In a 2022 study in the Journal of Clinical and Experimental Neuropsychology, Poulton and colleagues compared short online forms of the Advanced Progressive Matrices, one of the Raven's tests, and found that "test duration was found to be highly variable for the untimed version" (read 20 October 2026 through Europe PMC).

Mensa admission tests

American Mensa's testing page says: "The Mensa Admission Test takes between one to two hours to complete" (read 20 October 2026). You can take it at a session run by a local group's volunteers or at one of "more than 400 approved testing facilities nationwide". You need a photo ID with proof of your date of birth, and you can take a test "once every eight weeks", according to the same page.

Local groups give slightly different figures. Orange County Mensa says "The standard test session takes approximately two hours", and Cincinnati Mensa says its proctored tests "take about two hours to complete" (read 20 October 2026). Cincinnati Mensa also says its testing is for people aged 14 and over.

Results take longer than the session. Orange County Mensa says private testing results come back in a few days, and local group results in 2 to 3 weeks, because the tests are scored at the American Mensa National Office (read 20 October 2026). If you already have a score from another test, American Mensa says "Evaluation of prior test scores should only take two to four weeks."

Online IQ tests

Each online test sets its own length. Before you start one, check its own page for the number of puzzles, the time limits and what the result includes.

Length is not the only difference. A clinical test such as the Stanford-Binet 5 is given individually by a clinician (PRO-ED; Texas Statewide Leadership for Autism Training). Pearson sells the WAIS-5, WISC-V, WPPSI-IV and WASI-II only to buyers at its qualification level C, which calls for "A doctorate degree in psychology, education, or a closely related field" with formal training in giving and interpreting clinical tests, or a relevant license (Pearson qualifications policy, read 20 October 2026). The APA says "not just anyone can perform a psychological evaluation" (APA, updated August 2022).

An online test can give you a quick estimate on the standard IQ scale. It does not replace an assessment by a psychologist, and it cannot diagnose anything. Every score, online or clinical, is a measurement with a range around it, and it can differ between tests and between sittings. Our guide to whether IQ tests are accurate covers what affects that range, and our guide to IQ percentiles explains how to read a score on the standard scale.

Why two people take different times

Two people can sit the same test and finish at very different times. Three parts of how clinical tests are built make the difference.

• Start points and stop rules. Each subtest starts at a point set by age or by an earlier result, and stops after a run of wrong answers, called a discontinue rule. Someone who keeps answering correctly keeps going. The WAIS-5 FAQ on Pearson's page says examinees who score very high "commonly require long testing times because they meet discontinue rules late in the item order or not at all", and that special start points for them cut testing time by about 25% (Pearson, read 20 October 2026). The Stanford-Binet 5 does something similar: its opening routing subtests set the starting level for the rest (PRO-ED; Texas Statewide Leadership for Autism Training, read 20 October 2026).
• Timed and untimed tasks. Some subtests have strict time limits and others do not. The WAIS-5 FAQ says Visual Puzzles and Figure Weights are strictly timed, while Matrix Reasoning uses a 30-second guideline, because "the vast majority of examinees who will respond correctly do so within 30 seconds" (Pearson, read 20 October 2026). The examiner may allow more time when a person tends to answer late but correctly.
• Which scores are needed. A Full Scale IQ alone is shorter than a full set of index scores, and extra subtests add time, as the WAIS-5 FAQ says.

Breaks add time too. Columbia Neurology says "Patients are encouraged to take breaks during the evaluation" and that "Longer evaluations are sometimes divided into several appointments" (read 20 October 2026).

Does a time limit change your score?

On some tasks speed is part of what is scored. The WISC-V FAQ on Pearson's page says that removing Block Design's time bonuses "would result in a loss of the ceiling, greatly reduced reliability, and a much lower correlation with general intelligence" (read 20 October 2026). The same FAQ says that in early research with extended time limits, "the children who answered correctly after the time limit were of lower ability than children who answered before the time limit".

On matrix puzzles, the picture is less simple. In a 2023 experiment published in the Journal of Intelligence, Gonthier gave 18 items from the Advanced Progressive Matrices with unlimited time, 20 minutes or 10 minutes. Even mild time pressure made people speed up from the first item, use less effective strategies and score lower, with an effect size of d = 0.35 (Gonthier, 2023). The author concludes that the effects make "even mild time constraints inadvisable when attempting to measure maximal performance". The same paper's review notes that "at the task level", "better participants tend to be slower", and that longer response times can largely reflect time spent checking an answer.

These findings describe different tasks, so they do not contradict each other. A timed processing-speed task measures speed on purpose. An untimed reasoning task gives a fairer reading when you have enough time to think. When you compare two scores, check whether both tests had the same time limits.

What to expect on the day

For a clinical test, the psychologist or clinic will tell you what to bring and how long to plan for. A few practical points from the clinics above:

• Plan for the whole visit. Henry Ford Health says there is an hour's break for lunch if children's testing runs past the morning, and ColumbiaDoctors builds in breaks as needed (read 20 October 2026).
• Send records ahead if asked. ColumbiaDoctors' children's service asks families to send, if available, previous psychological reports, school reports, therapy reports and relevant medical history before the intake appointment (read 20 October 2026).
• Ask how the results will reach you. Henry Ford Health schedules a feedback appointment two to three weeks after a child's evaluation and says "our full report takes a couple of weeks to process". OHSU reviews adult findings "A few weeks after the evaluation" (read 20 October 2026).
• For Mensa, bring a photo ID with proof of your date of birth (American Mensa, read 20 October 2026).

Taking a test yourself

If you want a quick estimate first, WhatIQ's test has "24 picture puzzles, about 15 minutes", with a time limit of 45 to 75 seconds for each puzzle (whatiq.com, read 20 October 2026). It gives a score on the standard IQ scale with the range it most likely sits in, and the site says it is "an estimate from 24 puzzles, not a clinical assessment".

Frequently asked questions

How long does the WAIS take?

For the WAIS-5, Pearson lists 45 minutes for the Full Scale IQ, which uses seven subtests, and 60 minutes for the ten subtests behind the five primary index scores (Pearson, read 20 October 2026). The older WAIS-IV is listed at 60 to 90 minutes for its core subtests. Breaks, instructions and any extra subtests add to that.

How long is an IQ test for a child?

Pearson lists about 60 minutes for the WISC-V core subtests, for ages 6 to 16, and 30 to 60 minutes for the WPPSI-IV, depending on the child's age (Pearson, read 20 October 2026). A full evaluation at a clinic is longer. ColumbiaDoctors' children's service usually spreads testing over two to three days.

Is an IQ test timed?

Partly. Clinical tests mix timed and untimed tasks. On the WAIS-5, Visual Puzzles and Figure Weights have strict time limits, while Matrix Reasoning uses a 30-second guideline that the examiner can extend (Pearson, read 20 October 2026). The classic Raven's test is untimed, though Pearson says the newer Raven's 2 can also be given under timed conditions.

How long is the Mensa test?

American Mensa says its admission test takes between one and two hours (American Mensa, read 20 October 2026). Local groups such as Orange County Mensa describe a standard session of about two hours. Orange County Mensa says results from local group testing take 2 to 3 weeks, because the tests are scored at the National Office.

How long do online IQ tests take?

It depends on the site, because each online test sets its own number of puzzles and its own time limits. Check the test's own page before you start for how many puzzles there are, how long you have and what the result includes. An online test gives an estimate and does not replace a clinical assessment by a psychologist. Any score it gives has a range around it.

When do you get your results?

That depends on who gives the test. After a clinical evaluation, the report usually takes a few weeks: Henry Ford Health schedules feedback two to three weeks after a child's evaluation, and OHSU reviews adult findings a few weeks later (read 20 October 2026). Orange County Mensa puts Mensa results at a few days for private testing and 2 to 3 weeks for local group testing.