The Stanford-Binet online

0 Quick Answer

You cannot sit the Stanford-Binet Intelligence Scales Fifth Edition by yourself in a browser, because the instrument is not sold to you and is not built to run without an examiner in the session. The SB5 is published by Riverside Insights and distributed by PRO-ED. The Riverside store lists the complete kit at 1,422 dollars, and the PRO-ED product page lists it at 1,353 dollars with a stated qualification of Test Level C. Level C is the most restricted tier in the standard purchasing system used across the assessment industry.

What exists online instead is a set of websites that borrow the name. One of them, stanford-binet.org, sells a 35 to 45 minute web assessment starting at 49 dollars per person and describes itself on its own home page as "the only accredited online version of the Stanford-Binet 5th Edition." Others, including stanfordbinettest.com and iqtest-free.org, give a short quiz away for free. None of the pages this article examined states a relationship with Riverside Insights, and none was found listed by Riverside either. That is a gap in the public record, not a finding in either direction, and this page says so wherever it applies.

What the SB5 is, how its routing works, and what its five factors measure are covered on the page on how the Stanford-Binet 5 works, and are not repeated here. This page answers one narrower question: can you take it online, what are these sites charging for, and what is the honest alternative for an adult who wants a normed cognitive score today.

1 Who Publishes the SB5 and What It Costs to Own One

The first thing to establish about any test is who owns it, because that is the only party with the authority to say what an authorized administration looks like. The Stanford-Binet Intelligence Scales Fifth Edition was authored by Gale H. Roid and published in 2003. It is published by Riverside Insights, the company that traces back to the Riverside Press, which carried the Stanford revision of the Binet scale through the twentieth century. PRO-ED distributes the kit and lists Roid as the author on its own product page.

Both listings describe a physical product. The Riverside store shows two line items: a complete kit at 1,422 dollars and a pack of 25 test records at 125 dollars. PRO-ED lists the complete kit with carrying case at 1,353 dollars, an age span of 2 to 85 and older, and an administration time of approximately five minutes for each of ten subtests. PRO-ED also prints an administration condition in plain language: "A trained adult examiner must always closely supervise the administration of the test."

Those prices matter to a reader for a reason that has nothing to do with affordability. A kit costing more than a thousand dollars, sold in a physical box with printed record forms and manipulatives, is not a product that can be delivered through a web form. The economics and the format both point the same way. What the publisher sells is the equipment a qualified examiner uses in a room with one person.

The tests.com row is included because that page ranks for this query and is often read as if it were an online version of the test. It is not. Its Stanford-Binet guide is an informational page that correctly names the publisher and sells preparation materials, and it offered no Stanford-Binet practice items when this article was written. A reader arriving there looking for the test itself will not find it, which is the correct outcome. The broader map of which instruments exist and who publishes them is on the inventory of test families in current use.

2 What the Level C Restriction Actually Restricts

Level C is not a marketing tier. It is a purchase gate that most people cannot pass, and it is the mechanism that keeps the SB5 off the open market. Test publishers classify their catalog into qualification levels, and the definitions are published. The PRO-ED qualifications policy states that Level A products have "no special qualifications to purchase," that Level B requires a master's degree in a relevant field with formal training in ethical assessment, and that "Tests with a C qualification require a high level of expertise in test interpretation."

The Pearson qualifications policy uses nearly identical wording for the same three tiers, which tells you the system is an industry convention rather than one company's rule. A Level C purchaser must hold a doctorate in psychology, education, or a closely related field with formal training in the ethical administration, scoring, and interpretation of clinical assessments, or hold state licensure or certification in a related field, or hold full active membership in a professional body such as the American Psychological Association, the National Association of School Psychologists, the National Academy of Neuropsychology, or the International Neuropsychological Society.

Read that list against the ordinary reader of this page. A person who wants to know their own cognitive profile is almost never eligible to buy the instrument, and a website operator is almost never eligible either unless a qualified professional stands behind it. The restriction exists because interpretation is where the damage happens. A raw score is arithmetic. Turning it into a statement about a person requires knowing what the norm sample was, what the confidence interval is, what the behavioral observations during the session showed, and what the referral question was in the first place.

The professional layer sitting on top of the purchase gate is described on the page on what a full adult testing process involves, and the cost of getting one is broken down on the page on what an IQ test costs.

3 What a Legitimate Remote Administration Looks Like

Remote does not mean unsupervised, and the difference between the two is the entire subject of this page. Riverside Insights published a 43 page document titled Tips for Remote Assessment Using Riverside Insights Clinical Products. It opens with a sentence worth reading twice: "While Riverside Insight's clinical assessment tools are normed and designed for face to face individual administration, we recognize that remote assessment may be required during the current COVID-19 pandemic."

The requirements that follow are the opposite of convenient. Two computers with audio and video and stable internet, one for the examiner and one for the examinee. A stationary web camera, microphone, and speakers or headphones on both ends. A screen at least 15 inches measured diagonally, with visual stimuli presented at a minimum of 9.7 inches on the examinee's screen. The document states plainly that "Smartphones and small tablets do not meet these parameters, and therefore are not appropriate." A second peripheral camera is recommended so the examiner can watch the workspace and the hands.

Then come the human requirements. The examiner screens the person for suitability before agreeing to test remotely, considering age, referral question, and physical limitations. An onsite facilitator may be needed, and if that facilitator is a parent or guardian the examiner must judge whether they can perform logistical tasks without interfering. Response booklets travel in a sealed envelope that is shown to the camera unopened, opened on instruction, and resealed and signed across the seal in full view. The examiner is told to practice on colleagues first, to follow face to face procedure as closely as possible, and to note any deviation and consider it when scoring and interpreting the results.

The point stands regardless. Every version of legitimate remote testing described in that document has a licensed examiner watching in real time, controlling the materials, and recording deviations. None of it resembles a person clicking through 25 multiple choice items alone. The professional and consumer routes are set side by side on the professional versus online comparison.

4 What the Sites Ranking for This Query Are Selling

Five properties dominate this search, they sell four different things, and only one of them charges money. Each row below records what the site publishes about itself, read in September 2026. Nothing here is an accusation. Prices and copy change, and a reader checking later should check the pages themselves.

Two of these are honest about what they are. The stanfordbinettest.com disclaimer says its "Results from our free online IQ tests are not equivalent to professionally administered cognitive assessments," which is accurate and unusual to find on a page of this kind. The IDRlabs Binet test is a single paper folding task with 20 items and says outright that free online tests of that kind "do not provide professional assessments or recommendations of any kind." A 20 item spatial task is not an intelligence battery and IDRlabs does not claim it is.

The other three are looser. iqtest-free.org issues a certificate at the end of 30 questions and describes no reference sample anywhere this article could find, which means the number on the certificate has no documented population behind it. stanfordbinet.net displays a 60 question test with a 40 minute automatic scoring window and identifies no publisher or author. The paid one deserves its own section.

5 A Closer Reading of the One That Charges

stanford-binet.org is the only property in this set that takes payment, and its public copy is specific enough to quote and check. Its pricing page lists three plans: an Individual plan at 69 dollars per assessment, a Family Pack at 59 dollars per assessment for three or more participants, and an Academic plan at 49 dollars per assessment for ten or more, with custom quotes offered above 50. Each plan is described as including the full assessment of 35 to 45 minutes, a complete five factor report, a Full Scale IQ score with percentile rank, and personalized strengths and growth areas. A refund page carries the heading "Eligibility criteria and process for refund requests within 14 days."

The home page describes the product as "A modern online IQ assessment inspired by the Stanford-Binet 5th Edition framework," and, separately, as "The only accredited online version of the Stanford-Binet 5th Edition." Those two sentences do different work. The first is a statement about influence and is unobjectionable. The second is a stronger claim, and the word accredited is doing the load bearing. No accrediting body is named on the pages this article read. The site describes its operator as "A specialized center in educational psychology. Established 2001 in the UK," and lists addresses in New York and London with a contact address at the domain.

One detail is checkable without leaving the site. Its own product page named its five factors as Innate Intelligence, Knowledge, Logical-mathematical intelligence, Visual-Spatial Processing, and Working Memory when read in September 2026. The SB5's five factors, as described in the open scholarly literature and summarized on the SB5 explainer, are Fluid Reasoning, Knowledge, Quantitative Reasoning, Visual-Spatial Processing, and Working Memory. Three of five match. Two are renamed in ways that point at different constructs, since Innate Intelligence is not a construct in the Cattell-Horn-Carroll framework at all.

Its comparison page also cites in person Stanford-Binet testing at 500 to 1,200 dollars and 60 to 90 minutes, and warns that free entertainment tier scores "commonly swing 20+ points" across two sittings. That last claim is directionally consistent with the measurement literature, and it happens to apply to any short unsupervised test, including short paid ones. Score stability is a function of how much measurement was done, which is developed on the reliability and validity page.

6 Why the Name Travels and the Instrument Does Not

Stanford-Binet is one of a handful of test names that a general audience recognizes, and recognition is the asset being used. The pattern is not unique to this instrument. Any famous, restricted, expensive product generates a secondary market of things that share its name and none of its machinery. What makes intelligence testing an unusually attractive target is that the output is a single memorable number, and a number produced by a browser looks identical on screen to a number produced by a five hour clinical process.

The gap between them is invisible to the person reading the result, which is why it has to be described rather than shown. An SB5 administration involves a qualified examiner establishing rapport, running routing subtests to find an appropriate entry point, watching how a person approaches a task and not only whether they solve it, applying start points and stop rules item by item, and converting raw performance against an age matched reference table before writing anything down. A web quiz has items and a scoring script.

• The name is not the instrument. The same words can label a 1,422 dollar kit and a free 12 question quiz, and the search engine cannot tell them apart.
• Free is not the tell. Two of the free sites in the table above are more accurate about themselves than the paid one is.
• A five factor report is not five factors. Reporting five numbers requires enough items per factor to support five separate estimates, and a 25 item quiz does not have them.
• A certificate certifies nothing on its own. What gives a certificate meaning is the documented reference sample behind the score, which is the subject of the page on what an IQ certificate is worth.

None of this makes short online tests worthless. It makes the label wrong. A well built short online assessment is a legitimate product with its own honest description, and the case for and against one is worked through on the page on short tests that are actually normed. What it cannot honestly be called is the Stanford-Binet, because that name refers to a specific instrument with a specific norm sample, and the name is the only part of it that a web quiz can copy.

7 Why Age Norms Are the Part That Cannot Be Faked

An intelligence score is not a measurement of a person alone. It is a statement about where that person's raw performance sits inside a documented group of people the same age. That second half is the expensive half, and it is the half a browser quiz almost never has. Raw score to IQ conversion requires a reference sample whose size, composition, and age structure are recorded, and whose recruitment can be described. Building one is a research program, not a coding task.

The SB5's reference sample is why the instrument survives professional scrutiny. The SB5 Technical Manual (Roid, Riverside, 2003) reports a standardization sample of 4,800 individuals stratified to match the 2000 United States Census. That manual is not a public document, so treat the figure as publisher reported rather than independently verified here. What can be verified from public listings is the age span it supports: Riverside and PRO-ED both advertise the instrument for ages 2 to 85 and older, one of the widest spans any single battery claims.

Age matters more than most readers expect. Performance on reasoning and speed tasks does not stay flat across adulthood, so a raw score that puts a 22 year old at the middle of their age band puts a 68 year old well above the middle of theirs. Scoring a person against the wrong age group produces a number that is confidently wrong rather than obviously wrong, which is the harder failure to catch. How that conversion is built, and what happens when a test skips it, is covered on the page on norming.

The ACIS reference frame is narrower than the SB5's on purpose. It is an adult instrument, built for ages 16 to 90, which means every conversion table it uses is an adult table. That is a smaller claim than the SB5 makes and a more defensible one for the population it serves. The published derivation is in the ACIS technical manual, and what the resulting number means in ordinary language is on the IQ score scale.

8 How the SB5 Handles the Very High and the Very Low

The reason the SB5 keeps a following among people testing for giftedness is that it was built to keep measuring after other instruments run out of items. Most batteries report standard scores across a working range of roughly 40 to 160. Above and below that, there are simply not enough items of the right difficulty, and not enough people in the norm sample at that distance from the mean, to separate one score from the next. The SB5 addresses this with Extended IQ scores, which support Full Scale figures beyond the ordinary 40 to 160 range, together with gifted composite scores and change sensitive scores for tracking growth over time.

Whether those extended figures should be trusted at face value is a live question in the field, and this page will not settle it. What matters for a reader comparing an SB5 to a web quiz is the structural point underneath. Measuring at the extremes requires items that only a small fraction of people pass, plus a norm sample large enough to contain those people. A 25 item quiz has neither. Its highest possible score is capped by the difficulty of its hardest item, and its conversion table has nothing behind it at the tail.

This has a consequence people rarely anticipate. A short test does not fail at the extremes by refusing to report a number. It fails by reporting one anyway, drawn from a region of the scale where a single lucky or unlucky item moves the result by a large amount. That is why very high scores from short online tests cluster suspiciously, and why they are the least reliable part of the output rather than the most impressive. The specific problem of measuring at the ceiling is the subject of the page on high difficulty instruments, and how uncommon a given figure actually is can be checked on the rarity calculator.

For adults the practical route is different from the child gifted route. A person who wants a defensible figure at the top of the range needs enough items at that difficulty and enough breadth to show whether the height is uniform or concentrated in one domain. The adult version of that question is handled on the page on gifted testing for adults, and what the classification bands themselves mean is on the gifted range page.

9 The Five Factors and Where They Land in an Adult Battery

The SB5's five factor structure and the ACIS index structure are close to a one to one map, which is the most useful comparison in this article and the reason the substitution is worth taking seriously. Both are organized on the Cattell-Horn-Carroll framework, which is why the correspondence is not a coincidence. The SB5 measures each of its five factors in a verbal and a nonverbal version. ACIS measures six domains with dedicated subtests each.

The last row is the one difference worth naming. ACIS reports a sixth domain, processing speed, which the SB5 does not carry as a separate factor. That addition is not free. Processing speed is the least reliable of the six on the ACIS scale, with a published standard error of measurement of 5.22 points against 2.40 for verbal comprehension, and the lowest published g loading at .648. It is reported because it carries information the other five do not, and it is reported with its error attached rather than quietly.

The framework itself is explained on the CHC model page, and the domain by domain description of what each one covers is on the cognitive domains page. Readers who want the individual task formats can start from the subtest types explainer and follow through to the individual subtest pages such as Matrix Reasoning and Figure Weights.

None of this makes the two instruments interchangeable. An SB5 administration produces a clinical record with behavioral observations, and an ACIS session produces a score report from a self-administered online battery. The structural correspondence means the domains being sampled line up. It does not mean the conditions do.

10 What an Adult Can Actually Get Today

There are three real routes, they answer three different questions, and confusing them is what sends people looking for a Stanford-Binet in a browser in the first place. The routes are not ranked. Which one is right depends entirely on what the score has to do afterward.

The first two routes are the ones that exist when a decision hangs on the result. A school placement, a disability determination, an accommodation request, a court proceeding, a diagnostic question: those need a qualified examiner, a controlled setting, verified identity, and a signed report. Nothing self administered over the internet substitutes for that, at any price, from any vendor, including this one. How to find that route is on the page on where to get tested.

The third route answers a genuinely different question, and it is the one most people searching this phrase are actually asking. They want a structured, honest estimate of their own cognitive profile, at a price that does not require a referral. That is a reasonable thing to want, and it is served by a documented online battery rather than by a quiz wearing a famous name. The distinctions that separate the two are laid out on the page on online test accuracy and the survey of what is on the market.

For a comparison against the other major restricted battery an adult might encounter, the WAIS-5 page covers the current Wechsler adult scale, and the WAIS-5 against Stanford-Binet 5 comparison sets the two side by side on structure, age range, and reporting conventions.

11 Where ACIS Fits, Stated With the Interest Declared

ACIS sells a competing product, so the claim in this section carries a commercial interest and should be read with that in mind. ACIS is an online adult intelligence assessment for ages 16 to 90. The Full Scale form runs all 20 subtests across six CHC domains in about 175 minutes and costs 50 dollars as a one time payment. Two shorter forms exist: Optimized at 30 dollars with 13 subtests in about 110 minutes, and Quick at 15 dollars with six subtests in about 45 minutes. Paid access lasts 30 days, there is a 7 day free trial, and a 5 day guarantee.

What separates it from the sites in the table earlier is not the interface. It is that the numbers are published and can be argued with. The Full Scale form reports a Full Scale IQ plus all six primary indices and the composites built from them. The published index reliabilities run from an omega of .9745 for verbal comprehension down to .8790 for processing speed, with standard errors of measurement of 2.40 and 5.22 points respectively. The General Ability Index, built from the 15 non speeded reasoning and knowledge subtests, is published at an omega of .9885 with a standard error of 1.61 points. Those figures are in the technical manual with their derivation.

The limits belong in the same paragraph as the figures. ACIS is a self-administered assessment. Its adult reference frame is documented in the technical manual. It is not a clinical instrument, it is not diagnostic, and it is not appropriate for hiring decisions, accommodation requests, or high IQ society admission. A reliability coefficient describes consistency inside the frame it was computed in and does not convert a self-administered session into a proctored one.

If the reason for searching was curiosity about your own profile rather than a document somebody else needs, the Full Scale form is the version that answers it, because a six domain profile requires enough subtests per domain to estimate six things rather than one. What the session involves is described on the adult test page, and the case for taking the long form rather than a short one is on the full scale battery page.

12 How to Check Any Site Claiming to Offer a Named Instrument

The checks below take about ten minutes and work for any test name, not only this one. They are ordered by how much they tell you per minute spent. None of them requires expertise, and all of them can be done before paying.

• Find the publisher first. Search the instrument name plus the word publisher. If a restricted kit exists at a professional price, the online version is at best inspired by it. For the SB5 that is Riverside Insights, with distribution through PRO-ED.
• Check the qualification level. Level C means the instrument is not sold to the general public. A consumer facing site cannot deliver an instrument it cannot buy without a licensing arrangement, and a licensing arrangement is the sort of thing a site states loudly.
• Look for a norm sample. Ask for a number: how many people, what ages, recruited how, in what year. A site that reports IQ scores and cannot answer that has no reference frame, whatever the score looks like.
• Look for a reliability figure and a standard error. Any test that reports a number should also report how much that number moves on repeat measurement. Absence here is more informative than any marketing claim.
• Count the items per reported score. Five factor reports need enough items to support five estimates. Divide the item count by the number of scores and see what is left per score.
• Read the affiliation language literally. "Inspired by" and "based on" are honest descriptions of influence. "Accredited" is a claim that names an accreditor or means nothing.
• Check the factor names against the real instrument. Renamed factors are a fast signal that the structure was reconstructed from public descriptions rather than licensed.

Applying those checks to the five sites in this article separates them quickly. Two disclaim affiliation and describe their tests accurately. One publishes prices and an accreditation claim without an accreditor, a norm sample, or a reliability figure. Two publish neither disclaimers nor documentation. That is the whole finding, and it took less time to establish than the shortest of the tests takes to complete.

13 Sources Behind This Page

Every figure above traces to a document a reader can open, and the ones that cannot are labeled as publisher reported in the sentence that uses them. Prices, product listings, and website copy were read in September 2026 and are dated wherever they appear, because all three change without notice.

• Riverside Insights. Stanford-Binet Intelligence Scales (SB5) store listing. Complete kit at 1,422 dollars, test records pack of 25 at 125 dollars, ages 2 to 85 and older, about five minutes per subtest.
• PRO-ED. SB5 Complete Test Kit with Carrying Case. Author Gale H. Roid, complete kit at 1,353 dollars, Test Level C, individual administration, examiner supervision required.
• PRO-ED. Qualifications Policy. Definitions of Levels A, B, and C, including the doctorate, licensure, and professional membership routes to Level C.
• Pearson Assessments. Qualifications Policy. Parallel Level A, B, and C definitions, confirming that the tier system is an industry convention rather than one publisher's rule.
• Riverside Insights. Tips for Remote Assessment Using Riverside Insights Clinical Products. Equipment, environment, facilitator, response booklet, and practice requirements, and the list of covered products, which does not include the SB5.
• stanford-binet.org. IQ Test Pricing. The 69, 59, and 49 dollar plans, the 35 to 45 minute duration, the report contents, and the 14 day refund window heading.
• stanfordbinettest.com. Free Online Stanford-Binet IQ Test. The 12 question and 25 question free quizzes, and the disclaimer of affiliation with any official test publisher or academic institution.
• IDRlabs. Binet IQ Test. A free 20 item paper folding task with an explicit statement that free online tests of this kind do not provide professional assessments.
• iqtest-free.org. Free IQ Test. Thirty questions in 20 minutes with an instant certificate, no standardization sample described.
• tests.com. Stanford-Binet Testing Guide. Names the publisher, reports a kit price, and sells preparation materials from 64 to 1,261 dollars.
• Publisher reported, not independently verified here. Roid, G. H. (2003). Stanford-Binet Intelligence Scales, Fifth Edition, Technical Manual. Riverside Publishing. Standardization sample of 4,800 stratified to the 2000 United States Census, Extended IQ scores, gifted composite scores, and change sensitive scores.
• ACIS. Technical manual. Index reliabilities and standard errors of measurement, the six domain structure, the composite definitions, and the adult reference frame for ages 16 to 90.

The professional framework governing all of it is explicit. The Standards for Educational and Psychological Testing, published jointly in 2014 by the American Educational Research Association, the American Psychological Association, and the National Council on Measurement in Education, require that a score interpretation be supported by evidence for the specific use proposed, that measurement error be reported alongside any classification, and that the composition and limits of the norm sample be disclosed. The APA standards on test use add the requirement that the person interpreting a result be qualified to do so for that purpose.

Read against those requirements, the distinction on this page stops being a matter of taste. An instrument that publishes its norm sample, its reliability, and its standard error can be evaluated. One that publishes a price and a score cannot be, and a famous name on the page does not close the gap. The same test applied to this site's own product is the reason its figures sit in a published manual rather than in marketing copy, and the reason the limits are printed next to them.

14 Frequently Asked Questions