what IQ score do you need for Mensa?

Mensa is the oldest and largest high-IQ society in the world. Founded in 1946 in Oxford, England by Roland Berrill and Lancelot Ware, it exists as a non-political organization whose sole qualification for membership is a demonstrated score at or above the 98th percentile on a standardized intelligence test. As of 2024, Mensa has approximately 145,000 members across more than 90 countries.

The name "Mensa" is Latin for "table," reflecting the organization's founding principle of a round-table society where all members meet as equals regardless of background, age, or profession. Membership is based exclusively on cognitive test performance — no other criteria apply.

Mensa requires a score at or above the 98th percentile on an approved, standardized intelligence test. What this translates to in IQ points depends on which test's scoring scale is used:

• Wechsler scales (WAIS, WISC): IQ 130 or above (SD = 15)
• Stanford-Binet 5: IQ 130 or above (SD = 15)
• Cattell III B: IQ 148 or above (SD = 24)
• Raven's Progressive Matrices: Score at or above the 95th percentile on the raw score distribution (exact IQ equivalent varies by norming edition)

The critical point is that the requirement is always the top 2% of the population, regardless of the numerical score. A score of 148 on the Cattell is equivalent to 130 on the Wechsler — both represent the same position on the distribution. For a full breakdown of how different scoring scales compare, see the IQ scale and score chart.

Mensa accepts scores from a wide range of standardized, professionally administered intelligence tests. Each national Mensa chapter maintains its own list of approved tests, but commonly accepted instruments include:

• Wechsler Adult Intelligence Scale (WAIS-IV)
• Wechsler Intelligence Scale for Children (WISC-V)
• Stanford-Binet Intelligence Scales, Fifth Edition
• Cattell Culture Fair Intelligence Test (Cattell III B)
• Raven's Progressive Matrices (Standard and Advanced)
• Reynolds Intellectual Assessment Scales (RIAS)
• Cognitive Assessment System (CAS)

Tests must have been administered by a qualified psychologist or through a recognized testing program. Self-administered or online tests are not accepted for membership purposes, though they can be useful for practice and self-assessment.

There are two pathways to Mensa membership:

1. submit prior qualifying scores

If you have already taken an approved standardized intelligence test and scored at or above the 98th percentile, you can submit your score documentation directly to your national Mensa organization. They will verify the test, the administering professional, and the score before granting membership.

2. take the Mensa admissions test

Most national Mensa chapters offer their own supervised admissions test. In the United States, American Mensa administers a test battery at proctored sessions held at various locations throughout the year. The test fee is typically around $40-60 USD. The battery generally consists of two tests — one culture-fair (non-verbal, pattern-based) and one verbal or general reasoning assessment. Qualifying on either test is sufficient for admission.

Testing sessions must be supervised. Remote or at-home testing is generally not available. Check your national Mensa website for upcoming test dates and locations.

The specific content of the Mensa admissions test varies by country, but most versions share common characteristics. The tests are timed, typically lasting 20-40 minutes each. Questions are multiple-choice. No specialized knowledge is required — the tests measure reasoning ability, not learned information.

The culture-fair component usually consists of non-verbal pattern recognition tasks similar to Raven's Progressive Matrices: you are shown a series of geometric patterns with a missing element and must identify the correct completion from a set of options. These tasks primarily assess fluid intelligence, the capacity to reason through novel problems independent of prior knowledge.

You cannot study for the test in the traditional sense, since it does not test factual knowledge. However, becoming familiar with the format of matrix reasoning problems can help reduce test anxiety and improve time management during the actual assessment.

"You need an IQ of 140 to join Mensa." This is incorrect. The threshold is the 98th percentile, which corresponds to an IQ of 130 on the Wechsler and Stanford-Binet scales (SD = 15). The confusion often arises from the Cattell scale, where the equivalent score is 148. Some online sources incorrectly conflate these numbers.

"Mensa members are all geniuses." The 98th percentile threshold means roughly 1 in 50 people qualifies. In a country of 330 million, that is approximately 6.6 million potentially eligible individuals. Qualifying for Mensa indicates above-average cognitive test performance, not genius in any colloquial sense.

"You can use an online IQ test to get into Mensa." No online test is accepted for Mensa membership. All qualifying scores must come from supervised, professionally administered tests. Online tests — including ours — can serve as useful practice tools to gauge whether you are likely to qualify, but they are not substitutes for the official admissions process.

"Mensa membership means you are smarter than everyone else." IQ tests measure a specific set of cognitive abilities. They do not capture creativity, emotional intelligence, practical skills, or domain expertise. Many accomplished individuals have never taken an IQ test and would have no reason to join Mensa.

There is a meaningful distinction between practice tests and official tests, and understanding it is important for setting realistic expectations.

Practice tests, including the one offered on this site, use similar question formats and scoring methodologies to estimate your cognitive ability. They provide a reasonable approximation but lack the controlled conditions of a supervised test: standardized timing, distraction-free environment, and verified identity. Scores from practice tests tend to be slightly higher than supervised results, partly because of practice effects and partly because of uncontrolled testing conditions.

If you score at or above 130 on a well-designed practice test, you have a reasonable chance of qualifying on the official Mensa admissions test — but it is not guaranteed. Conversely, scoring slightly below 130 on a practice test does not mean you will fail the official test. Use the IQ percentile calculator to understand exactly what your score means in statistical terms.