Pick the test you took, enter your score — see whether it qualifies for Mensa. Mensa accepts members at the 98th percentile, with different cutoffs per scale because each test has its own standard deviation.
Mensa International is the world’s oldest and largest high-IQ society. Founded in Oxford in 1946, it accepts members whose verified IQ score sits at or above the 98th percentile of the general population — that is, the top 2%. Membership crosses a hundred-plus countries, with around 145,000 members worldwide.
The 98th-percentile rule is universal across Mensa branches. The exact score that hits that percentile, however, depends on which test you took, because each scale uses its own standard deviation.
Mensa publishes a list of accepted tests and their cutoffs. The four most common entries:
| Test | Cutoff | Standard deviation |
|---|---|---|
| Stanford-Binet 5 | 132 | 15 |
| Wechsler (WAIS, WISC, WPPSI) | 130 | 15 |
| Older Stanford-Binet (1960, 1986) | 132 | 16 |
| Cattell III B | 148 | 24 |
The reason a 130 on Wechsler and a 148 on Cattell mean the same thing: both correspond to roughly the 98th percentile. The 18-point difference is just a scale convention. Our score converter shows what your number on one scale becomes on each of the others.
Most online IQ tests do not produce Mensa-eligible scores. Mensa requires the test to have been administered in a supervised setting by a qualified administrator, and the score must come from an approved test. If your number came from a website you took on your phone, the calculator above will still tell you whether the number qualifies in principle — but Mensa will not accept it as evidence.
If you suspect you’d qualify, the path is to sit a supervised test. Mensa runs its own admission test in many countries (in the US, around $99 with a same-day result), and accepts prior scores from the approved list above.
Mensa accepts your highest score from any approved test. Scoring 128 on a Wechsler scale (two points shy of 130) does not close the door — you can sit a different approved test, including Mensa’s own admission test, and use whichever score is highest. People often qualify on a second or third attempt, particularly when they switch from a self-administered online test to a supervised one.
Membership requires you to either submit prior scores from an approved test or sit Mensa’s own admission test. Both routes are available in most countries. The Mensa International website lists the current approved tests and the admission process for your country.
Curious where you stand on the full Stanford-Binet — not just whether you’d qualify for Mensa?
Take the Stanford-Binet Online35 to 45 minutes · Full-Scale IQ + five factor indices · From $49
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