Mensa IQ Test: The Official Test and Free Online Practice

The official Mensa Admission Test

This is the one that counts. In the US, American Mensa offers the Admission Test either at a session proctored by local group volunteers or privately at one of 400-plus approved testing facilities. The whole sitting takes roughly one to two hours and is administered under standardized, supervised conditions. Cost depends on where you take it: local-group testing typically runs in the $40–60 range, while the electronic version at an approved center is around $99, as of 2026.

The scoring quirk that trips people up is the "battery of two tests." You are not taking one test — you are taking two, and you get two chances. If you score at or above the 98th percentile on either one, you qualify. You do not need to clear both. Mensa reports the result as a percentile, not a branded IQ number, precisely because the cutoff is defined by rank in the population, not by a single scale.

The UK works slightly differently: British Mensa offers a supervised test session, and it also sells a paid at-home "Home Test" as a stepping stone. Note that even the UK Home Test is a screening tool — the supervised session is what confirms membership. Details and pricing differ by national Mensa, so check your country's Mensa site for the current fee.

The free Mensa Workout: useful, but not qualifying

The Mensa Workout is a free online quiz on Mensa's website, about 30 minutes long. Mensa is blunt about what it is: the quiz is "provided for entertainment purposes only; it is not an IQ test," and your score "will not qualify you for Mensa." You cannot join on the strength of a Workout result.

So why take it? Because it is the most trustworthy free warm-up available. It is written by Mensa, so the question styles — logic, sequences, verbal and spatial reasoning — mirror the kind of thinking the real test rewards. Treat it as a readiness check. If you breeze through the Workout, booking the supervised Admission Test is a reasonable next step. If you struggle, you have your answer before spending anything.

The British Mensa "Online Workout" plays the same role: a free taster that leads people toward the paid Home Test or a supervised session, neither of which the Workout itself replaces.

The prior evidence route

If you have already been tested by a professional, you may not need to sit Mensa's exam at all. American Mensa accepts qualifying scores from roughly 200 standardized tests, including the Wechsler Adult Intelligence Scale (WAIS), Stanford-Binet 5, Woodcock-Johnson, and the SAT/ACT from certain years. You submit the documentation, pay a review fee (around $35–50 in the US as of 2026), and Mensa evaluates it, typically in two to four weeks.

The catch, again, is supervision. To be accepted, the original test must have been "administered by a neutral and qualified third party in a traditional testing environment" — for example, a psychologist's office or a certified school setting. A score you generated yourself online will never be accepted as prior evidence, which is the same reason unproctored tests cannot qualify you directly.

Where our test fits

Our IQ test is a free-to-take online estimate that gives you a sense of where you might land on a standard scale (mean 100, standard deviation 15). It is a fast, private way to gauge your reasoning before you commit to Mensa's supervised, paid process — the same job the Mensa Workout does. To be completely clear: it is not affiliated with Mensa, it is not the official Mensa Admission Test, and a strong result here does not qualify you for membership. If you want the Mensa badge, the supervised route above is the only door.

Frequently asked questions

Q: Can I join Mensa with an online test?

A: No. No unsupervised online test qualifies you for Mensa, including the free Mensa Workout and our own IQ test. Mensa requires a score in the top 2 percent on a test that was "properly administered and supervised." Only the official proctored Admission Test, or accepted prior evidence from a professionally administered test, counts toward membership.

Q: Does the free Mensa Workout count for anything?

A: Only as practice. Mensa states the Workout "will not qualify you for Mensa" and is for entertainment. It is a genuinely useful warm-up because Mensa wrote it, so it previews the real test's question styles — but your score has no official standing.

Q: How much does the official Mensa test cost?

A: Roughly $40 to $99 in the US, depending on how you take it (2026). Local-group proctored sessions are cheaper; the electronic version at an approved testing center runs about $99. The prior-evidence review fee is lower, around $35–50. Prices vary by country, so confirm with your national Mensa.

Q: What score do I need to qualify?

A: The 98th percentile — the top 2 percent of the general population. On Wechsler-scale tests that corresponds to an IQ of about 130. Mensa reports admission by percentile rather than a single IQ number, and you qualify by clearing the cutoff on either test in the two-test battery.

Q: Is your IQ test the same as the Mensa test?

A: No. Our test is an independent, free-to-take online estimate, not affiliated with Mensa and not the official Admission Test. It cannot qualify you for membership. Use it to gauge your reasoning; use the supervised Mensa Admission Test to actually join.

References

• Take the Mensa Admission Test — American Mensa
• Take the Online Mensa Practice Test (Mensa Workout) — American Mensa
• Join Mensa Using My Past Test Scores — American Mensa
• IQ Test FAQs — Mensa International

Last updated: July 13, 2026