How long does the Core Brain IQ test take?

About 20 minutes. The test uses a single global timer rather than per-question pressure, so you can pace yourself across the questions in your chosen difficulty.

Is the Core Brain IQ test free?

Taking the test is free. The full score report, percentile, six-axis cognitive profile, and downloadable certificate unlock with a one-time payment. There is no subscription.

What does Core Brain measure?

Six axes of cognitive ability: pattern recognition, numerical reasoning, verbal reasoning, spatial reasoning, logical reasoning, and abstract matrix reasoning. Your composite IQ is a balance-weighted score across all six.

Is Core Brain a clinical or medical IQ test?

No. Core Brain is a fast online cognitive self-assessment for entertainment and self-reflection. It is not a diagnostic, medical, psychological, or psychiatric instrument and must not be used for academic, employment, or medical decisions.

Can I get a certificate?

Yes. After unlocking your result you can download a personal certificate showing your IQ, band, percentile, six-axis profile, and the date of your assessment.

How accurate is an online IQ test?

Online tests like Core Brain are calibrated against a normed distribution and approximate professionally administered tests reasonably well for healthy adults under timed conditions. They are not a substitute for clinical assessment.

What is item response theory and why does it matter?

Item response theory (IRT) is the modern psychometric framework used by professionally administered tests. Each question has known difficulty and discrimination parameters, and your latent ability is estimated from the specific pattern of your responses. Core Brain uses 3PL Bayesian IRT with a normed prior — the same family of methods used by the WAIS and Stanford-Binet.

— CORE BRAIN DIAGNOSTIC

Find the shape of your mind.

A short, calibrated online IQ test that maps how you reason — across pattern, spatial, logical, verbal, numeric, and matrix thinking. Twenty minutes. Start free, then unlock the exact score, full six-axis profile, and downloadable certificate with a one-time payment.

What is the Core Brain IQ test?

Core Brain is an online IQ test calibrated against a normed distribution. You can start for free; the exact composite IQ score, percentile, balance score, g-factor, per-axis breakdown, and downloadable certificate unlock with a one-time payment. No subscription.

How it works

Pick from five difficulty levels — Warm-up, Standard, Challenging, Hard, or Genius.
Answer questions calibrated to your level across six cognitive axes in 20 minutes.
Unlock a normed IQ score, percentile, six-axis cognitive profile, and downloadable certificate.
Entertainment and self-reflection only — not a clinical or medical assessment.

Frequently asked

How long does the IQ test take?

About twenty minutes total, with a single global timer rather than per-question pressure.

Is Core Brain free?

Starting the test is free. The exact score, full report, percentile, and certificate unlock with a one-time payment.

What does an IQ of 130 mean?

Roughly two standard deviations above the mean of 100 — top 2 percent of the population, classified as Highly Gifted.

What is the average IQ?

The average IQ is 100 by definition. Tests are standardised so the population mean is always 100, with a standard deviation of 15.

What IQ score do you need for Mensa?

The 98th percentile — IQ 130 or higher on Wechsler-scaled tests.

Reference guides

IQ percentile chart — full score-to-percentile lookup from 55 to 160
What is the average IQ? — the 100 baseline, Flynn effect, normal range
Mensa IQ score requirements — 98th percentile cutoff and accepted tests
IQ test types compared — Wechsler, Stanford-Binet, Raven's, Cattell

What does an IQ of X mean?

IQ of 85 — 16th percentile, Low Average
IQ of 100 — 50th percentile, population mean
IQ of 115 — 84th percentile, High Average
IQ of 120 — top 9%, Superior
IQ of 130 — top 2.3%, Highly Gifted (Mensa cutoff)
IQ of 140 — top 0.4%, Genius
IQ of 145 — top 0.13%, Profoundly Gifted

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