We go beyond
the number
Most tests hand you three digits and leave. We tell you the scale those digits were measured on, the percentile they correspond to, how much of the result is measurement error, and which cognitive domains produced it — then certify the whole thing with the International Intelligence Federation.
Excellent 4.8/51 million+ test takersIIF certified We go beyond a single number
A conventional IQ test ends where the interesting part begins. It produces one composite figure, prints it with great confidence, and tells you nothing about how it was arrived at. Our assessments are built to answer the question underneath the number: what was actually measured, against whom, and how certain is it?
BeyondA composite
Two people can post the same total and have completely different profiles. We report the domains underneath so the result describes you rather than an average of you.
BeyondA guess
Every score arrives with the confidence range that belongs to it. Precision you cannot support is not a service, it is a decoration.
BeyondThe test
The result connects to a full set of tools — convert it, place it on the curve, compare it, or check it against your own age band.
That last point is not a bolt-on. The percentile calculator, score converter, bell curve and comparison tool exist because a score you cannot interrogate is a score you cannot trust.
A number is easy. Context is the work. Our mission is to give you comprehensive insight into your intellectual abilities — not a figure to screenshot, but a result you can actually reason with, act on and return to.
Start Test →Your achievements deserve
formal recognition
Every completed assessment returns an official certificate from the International Intelligence Federation. It is not a badge generated on the way out. It records what was measured, on which scale, and when — the three details that turn a private number into something you can put in front of somebody else.
That distinction matters more than it first appears. A screenshot of a score proves nothing about the instrument behind it. A certificate naming the standard, the percentile and the date is quotable: on an application, on a CV, or simply as a dated record of where you stood at a point in time.
Issued by the IIF. An independent standard rather than a house scale invented by the site that sold you the test.
Scored on the standard scale. Mean 100, standard deviation 15 — the same scale used by the Wechsler tests and Stanford-Binet 5, so the figure travels.
Dated and recorded. Norms drift across decades, so the certificate fixes what you scored, against which population, and when you scored it.
If you already hold a result from another instrument, the IQ score converter will place it on the same scale first, and IQ over time covers why an undated score slowly stops meaning what it once did.
The number is easy.
The method is the work
A five-minute quiz and a properly normed assessment both hand you three digits, and both look equally certain doing it. Only one can tell you which population you were compared against, how much of the result is measurement error, and what the same ability would read on a different scale.
Scored on the standard scale — mean 100, standard deviation 15 — with the percentile and confidence range stated up front.
Four commitments behind
every result we issue
These are not slogans. Each one is a decision about how the assessment is built, and each one costs us something — in development time, in report length, or in the comfort of claiming more than we can support.
We give our best. The assessment is built and reviewed by specialists in psychology, psychometrics and educational assessment. Norming, reliability and error are their profession, not an afterthought — and they are the reason your result arrives with a range instead of false precision.
We go step by step. A wide range of assessment rather than one blunt total: reasoning and pattern recognition, working memory, problem solving, creativity and critical thinking. The breakdown is usually the more useful half of the report.
We empower your intellect. Every individual is different, so the report is written for one person rather than a population. Your standing in each domain, in plain language, with what it does and does not support — the detail you need to actually develop something.
We are friendly. A clean interface, an assessment you can move through without friction, progress you can see, and results you can reach without hunting. Ten to twenty minutes, no account needed for the tools, nothing dressed up in mystique.
The fourth commitment is why every calculator on the IQ Tools page runs in your browser and needs no account. Our Security and Privacy Policy sets out how the rest of the site handles data.
Your vision, our commitment
Cognitive assessment is not a settled field, and treating it as one is how tests quietly go stale. Our team keeps working: exploring new methodology, folding in current research, and revising the assessment as the evidence moves rather than when the marketing calendar says so.
ResearchKept current
Findings move, and norms drift with the populations they were built from. An instrument that never changes is not stable — it is ageing.
MethodKept honest
Where the evidence is disputed we say so and show the range, rather than picking the most flattering figure and printing it without a caveat.
ReportingKept readable
A result nobody can interpret has failed regardless of how rigorous the maths behind it was. Plain language is part of the measurement.
Choose IQ Metrics for expertise you can name, assessment that goes past one figure, insight written for you specifically, and an experience that stays out of your way. Join the people who use us to understand their cognitive profile properly — and start with how IQ tests work if you want the mechanics before the result. More on the team and the standards behind the assessment is on the about page.
Not a bigger number. A number that means something.
IIF certified assessment
Several domains, not one figure
A composite compresses a great deal into one number. We report what sits underneath it, because the profile is where the useful information lives — and because domains move independently across a lifetime.
ReasoningLogic and patterns
How reliably you find the relationship in a sequence and extend it — the closest thing there is to a general reasoning signal.
MemoryWorking memory
How much you can hold and manipulate at once. It shifts earlier with age than most other domains, which a composite alone would hide.
AppliedProblem solving
Whether the reasoning survives an unfamiliar problem rather than a rehearsed format — the part that transfers.
Because those move at different rates, a composite can sit perfectly still while its parts shift underneath. IQ and age shows that separation, and the IQ bell curve shows how any single score is distributed across the population. For national comparisons, average IQ by country places the same figures against population data.
Find out what your score is
— and what it is worth
The assessment returns a certified result with the scale, the percentile, the confidence range and a breakdown by domain. Everything the tools on this site need in order to tell you something true about it.
Secure and encrypted · instant results · no account needed to use the tools.
Why IQ Metrics, answered
What makes this different from a free online IQ quiz?
Three things a quiz almost never gives you: the scale the score was measured on, the percentile it corresponds to, and the confidence range around it. Without those a number cannot be compared with anything — not another test, not another person, not your own earlier result. How IQ tests work explains why those three figures are what make a score mean anything.
What is the IIF certificate and what does it actually certify?
It is an official record from the International Intelligence Federation stating your result, the scale it was measured on and the date it was taken. It certifies the measurement and the conditions around it — not a claim about you beyond what the assessment can support. That restraint is deliberate.
Which scale are results reported on?
The standard scale: mean 100, standard deviation 15, the same one used by the Wechsler tests and Stanford-Binet 5. If you hold a score from an SD 16 or Cattell III B test, the IQ score converter puts both on one scale so they can be compared honestly rather than by eye.
How accurate is a single result?
Accurate enough to be useful, not accurate enough to treat as a fixed property of a person. Every score carries measurement error, which is exactly why the report gives a 95% confidence range rather than a bare figure. How accurate IQ tests are covers where that range comes from.
How long does the assessment take?
Ten to twenty minutes for most people, in one sitting. Results are returned immediately, with the certificate and the full breakdown by domain — no waiting period and nothing held back behind a second payment.
What exactly do I get back?
Your score with its scale and confidence range, the percentile it corresponds to, a breakdown across the cognitive domains assessed, and the IIF certificate. The percentile is the figure worth quoting — it reads the same on every scale, which the percentile calculator will confirm for any score.
Do I need an account to use the IQ tools?
No. Every calculator on the IQ Tools page runs entirely in your browser, needs no account, and works with any score from any properly normed test, including a result from the kids IQ test. Nothing you type is transmitted or stored — our Security and Privacy Policy covers how the rest of the site handles data.
My score changed on a retest. Does that mean the test is unreliable?
Usually not. An unusually high or low first result tends to drift back toward your average on a second sitting — a statistical effect rather than a change in ability. Regression to the mean explains why, and the IQ comparison tool will tell you whether the difference clears measurement error at all.
Does my age affect the result?
Your score is always measured against people in your own age band, so age is already accounted for in the figure. What age does change is the profile underneath it: fluid abilities drift earlier than crystallised ones. IQ and age shows how the two separate across a lifetime.
Is the certificate recognised outside your site?
That is the point of using an independent body rather than issuing our own. The certificate names the standard, the percentile and the date, which is what makes a result quotable to an institution or an employer instead of being an anecdote with a number attached. Further questions are answered on our FAQ page.
Curious to know your
intellectual powers?
Take the leap. Ten to twenty minutes, an IIF-certified result, and a report that tells you what the number means instead of leaving you to guess.
Start Test →