— IQ score explained

IQ of 148 — meaning, percentile & profile

An IQ of 148 places you in the top 0% of the adult population — a profoundly rare score that only about 1 in 1000 people reach.

What does IQ 148 mean in practice?

An IQ of 148 means your raw performance on a standardised IQ test places you at the 100th percentile of the general adult population — higher than 100% of people. People at this level typically find abstract reasoning, pattern-matching, and learning new skills comes naturally.

IQ 148 and the normal distribution

IQ is defined with a mean of 100 and a standard deviation of 15. An IQ of 148 is 3.2 standard deviations above the mean. The normal distribution tells us that:

• About 68% of people score between 85 and 115
• About 95% of people score between 70 and 130
• About 99.7% of people score between 55 and 145
• An IQ of 148 is higher than 100% of the adult population

IQ 148 and career outcomes

An IQ of 148 is high enough to pursue any professional career. Research scientists, physicians, and academic lawyers average IQs of 125-132. At this level, the main differentiators are conscientiousness, motivation, and specific domain knowledge — not cognitive ceiling.

Comparing IQ 148 to common benchmarks

How to accurately measure your IQ

A reliable IQ test uses Item Response Theory (IRT) scoring, which adapts the scoring based on item difficulty parameters rather than simply counting correct answers. Core Brain uses IRT 3PL (three-parameter logistic) scoring — the same statistical framework used by the WAIS and Stanford-Binet — and returns your score with a 95% confidence interval so you know the measurement uncertainty.

Related IQ scores

• IQ 135 — Gifted, 99th percentile
• IQ 138 — Gifted, 99th percentile
• IQ 140 — Gifted, 100th percentile
• IQ 142 — Gifted, 100th percentile
• IQ 145 — Highly gifted, 100th percentile

Related reading

• Full IQ-to-percentile reference chart
• What is the average IQ?
• IQ test types compared
• Mensa IQ score requirement