You can join Mensa by either taking the Mensa Admission Test (offered at local chapters) or submitting qualifying scores from a previously taken standardized intelligence test (WAIS, Stanford-Binet, GRE, etc.). Prior qualifying test scores are accepted if they meet the 98th percentile threshold.

Mensa IQ Test: How to Qualify & Join

Q: What IQ do you need for Mensa?

Mensa requires a score at or above the 98th percentile on a standardized intelligence test. On most IQ tests using a standard deviation of 15, this corresponds to an IQ of approximately 130 or higher. On tests with a standard deviation of 16 (like the Stanford-Binet), the cutoff is about 132.

Q: What percentage of people qualify for Mensa?

Exactly 2% of the population qualifies for Mensa membership (the top 2nd percentile, or 98th percentile and above). That's about 1 in 50 people. In the US, this means approximately 6.6 million people qualify, though only about 50,000 are actually members.

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

The Mensa Admission Test is a culture-fair intelligence test that correlates highly with standard IQ tests. It produces a percentile ranking rather than a traditional IQ score. A score at the 98th percentile on the Mensa test is equivalent to approximately 130 IQ on most standard tests.

Mensa is the world's oldest and largest high-IQ society, with over 145,000 members in 90+ countries. To join, you need to score in the top 2% of the population on a standardized intelligence test — that's an IQ of approximately 130 or higher. Here's everything you need to know about qualifying, testing, and what membership actually involves.

Mensa IQ Requirements

Minimum IQ for Mensa

130+

98th percentile — top 2% of population

The exact score depends on which test you take:

IQ Test	Standard Deviation	Mensa Cutoff Score
WAIS (Wechsler)	15	130
Stanford-Binet 5	15	130
Stanford-Binet (older)	16	132
Cattell	24	148
Mensa Admission Test	N/A	98th percentile

How to Take the Mensa Test

There are two ways to qualify for Mensa:

Option 1: Take the Mensa Admission Test

American Mensa offers its own admission test at local chapter events nationwide. The test costs about $40 and takes approximately 90 minutes. It includes two separate tests: the Mensa Admission Test (a culture-fair reasoning test) and the Mensa Wonderlic-style test. You receive your results within a few weeks. If you score at the 98th percentile on either test, you qualify.

Option 2: Submit Prior Test Scores

Mensa accepts qualifying scores from over 200 standardized tests, including:

WAIS or WISC — score of 130+ (the gold standard)
Stanford-Binet — score of 130+ (SD 15) or 132+ (SD 16)
GRE — combined score of 1300+ (old scale) or approximate equivalent
SAT — score of 1250+ (pre-1994) — see our SAT to IQ conversion
LSAT — score in the 95th+ percentile
ACT — composite score of 29+
Military ASVAB — AFQT score of 95+

What Does Mensa Membership Get You?

Local chapter events — social gatherings, lectures, game nights with other high-IQ members
Special Interest Groups (SIGs) — 200+ groups covering everything from astronomy to wine tasting
Mensa Bulletin — monthly magazine with puzzles, articles, and member content
Annual Gathering — national convention with speakers, workshops, and social events
Networking — connections with accomplished people across diverse fields
Scholarships — Mensa Foundation awards over $200,000 annually in scholarships

Is Mensa Worth Joining?

Opinions vary widely. Members report that the social connections and intellectual stimulation are the primary benefits — particularly for people who've felt intellectually isolated. Critics argue the $79/year dues aren't justified, and that defining yourself by an IQ score is limiting. The practical career value of Mensa membership is minimal — most employers don't care about it.

The biggest value is typically for people who want to connect with intellectual peers in a low-pressure social environment. If that appeals to you, membership can be worthwhile.

How to Prepare for the Mensa Test

Since the Mensa test measures reasoning ability rather than knowledge, traditional "studying" doesn't apply. However, you can prepare by:

Practicing pattern recognition and matrix reasoning puzzles (similar to Raven's Progressive Matrices)
Getting adequate sleep the night before (sleep deprivation can reduce effective IQ by 5-10 points)
Eating well and staying hydrated on test day
Managing test anxiety through relaxation techniques
Taking practice IQ tests to familiarize yourself with the format

Our free IQ test can give you a rough estimate of where you stand before committing to the official Mensa test.

Frequently Asked Questions

What IQ do you need for Mensa?

130+ on most standard IQ tests (98th percentile). See the table above for specific test cutoffs.

How do I join Mensa?

Take the Mensa Admission Test (~$40 at local chapters) or submit qualifying scores from a previously taken standardized test.

What percentage of people qualify for Mensa?

Exactly 2% — about 1 in 50 people. In the US, ~6.6 million qualify but only ~50,000 are members.

Is the Mensa test the same as an IQ test?

It's similar — a culture-fair reasoning test that produces a percentile score equivalent to approximately IQ 130 at the qualifying threshold.

Curious if you could qualify? Take our free IQ test for a quick estimate. Or learn more about what a 130 IQ means and genius-level intelligence.