Is an IQ of 64 Good? What It Means & Where You Stand

What Does an IQ of 64 Mean?

An IQ of 64 falls in the extremely low range at the 1st percentile. Many individuals at this level develop functional daily living skills, basic communication, and can participate in supported work environments. The score is near the boundary for mild intellectual disability classification, which requires both low IQ and adaptive functioning limitations.

An IQ of 64 places you at the 1st percentile, which means you scored higher than approximately 1% of the general population on a standardized intelligence test. This score falls into the Extremely Low range on the IQ scale. With a rarity of 1 in 130, this score is less common, but IQ is just one measure of cognitive ability.

To understand how IQ scores are calculated and what they measure, see our complete guide on what IQ is and how it works. For a full breakdown of all score ranges and their meanings, visit our IQ score ranges page.

How Precise Is a Score of 64?

Less precise than a single number suggests. Professionally administered IQ tests carry a standard error of measurement of roughly 3–5 points, which means a measured score of 64is best read as a range of about 59 to 69 — and scores from short online tests vary even more. Test-retest studies show the same person's score can shift by several points between sessions due to sleep, stress, motivation, practice effects, and simple chance. Different tests (WAIS, Stanford-Binet, Raven's) can also yield somewhat different numbers for the same person. Treat any single figure — including this one — as an estimate with a margin of error, not a fixed property. Our methodology page explains how our own estimate is calculated.

What an IQ of 64 Does Not Establish

An IQ score summarizes performance on abstract reasoning tasks at one point in time. It is not a medical or psychological diagnosis, and a score of 64 on its own does not determine your career ceiling, academic future, creativity, emotional intelligence, judgment, or character. Research links IQ to average outcomes across large groups, but individual outcomes vary enormously at every score level. If you need a clinically valid assessment — for educational placement, a disability evaluation, or gifted-program admission — only a licensed psychologist can provide one. See our disclaimer for the full limitations.

Career Context for an IQ of 64

Supported employment and structured day programs provide meaningful engagement. With job coaching, many individuals at this level successfully work in food preparation, custodial services, and supervised retail tasks.

A note on career framing: occupational IQ averages describe broad group tendencies from research samples — they are not entry requirements, and employers do not screen candidates by IQ. Interest, training, persistence, and opportunity shape careers far more than a test score.

Cognitive Profile at IQ 64

At IQ 64, the mild intellectual disability profile shows clearer verbal reasoning capacity and meaningful academic achievement potential. Verbal comprehension handles 5–7 sentence passages on familiar topics; main ideas and simple inferences are accessible. Working memory holds 5 items with active rehearsal and shows emerging capacity for brief mental manipulation. Processing speed is below the 5th percentile. Fluid intelligence demonstrates genuine analogical reasoning on concrete structured problems and some capacity to apply rules to novel but related situations. Reading with instruction typically reaches 4th–5th grade, supporting functional use of written text in daily contexts. Mathematical competence includes multi-digit operations, simple fractions, and money management up to complex transactions. Social cognition is often sophisticated — reading subtext in conversations, adjusting communication for different audiences, and managing multi-party social dynamics in familiar settings.

What Research Says About IQ 64

Project Talent longitudinal data show that IQ 64 corresponds to approximately 7th–8th grade academic achievement under optimal educational conditions. NLSY79 data (Gottfredson, 1997) documents that individuals at IQ 64 who completed high school achieved median annual earnings approximately 60% of the US median — substantially better than non-completing peers at similar IQ levels. Research by Leffert & Siperstein (2002) found social cognitive competence at IQ 64 was not significantly different from IQ 80 peers, suggesting social intelligence operates semi-independently of g at this range.

Day-to-Day Life with an IQ of 64

A person at IQ 64 works as a postal sorting clerk — organizing mail by route, operating a sorting machine interface, managing a daily workflow schedule, and accurately completing delivery logs. They have been promoted to senior sorter after 5 years and train new employees on their route. They own their home with a mortgage, manage monthly finances with a simplified tracking spreadsheet, drive, and handle most daily decisions independently. Reading is functional — they read simple to moderate text, send text messages, and follow written work instructions. Complex legal and financial documents require professional assistance.

How Does an IQ of 64 Compare?

Here's how a score of 64 compares to nearby IQ scores:

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