What does an IQ of 148 mean?
An IQ of 148 sits at the far right tail of the distribution — above 145, in the range popularly called "genius." Scoring higher than about 100% of people, 148 is extraordinarily uncommon, and it's worth being clear-eyed about what such a number does and doesn't say.
- Classification
- Highly Gifted
- Percentile
- >99th
- Scores higher than
- 100% of people
- Rarity
- about 1 in 1500
- vs. average (100)
- +48 points
Key takeaways
- An IQ of 148 is in the Highly Gifted range (145+), popularly called "genius."
- It is about the >99th percentile — about 1 in 1500.
- "Genius" is a popular label, not a clinical category.
Is an IQ of 148 good?
By the numbers, an IQ of 148 is exceptional — the kind of score only a tiny fraction of people reach. But "genius" is a loose popular term, not a scientific category, and at these extremes a short online test is least precise. Treat 148 as a sign of very strong reasoning, not a verdict on a person; achievement at this level still depends on what someone actually does.
How rare is an IQ of 148?
An IQ of 148 is extremely rare — about 1 in 1500. Fewer than under 0.1% of people reach it; in a random group of 1,000 you would expect at most about 1. Scores this far out also carry the widest measurement error.
What an IQ of 148 looks like in practice
At this extreme, score differences become hard to measure reliably and tell you little about any individual. Reasoning power is abundant; what shapes outcomes is how it's applied.
What makes an IQ of 148 distinctive
An IQ of 148 sits in the Highly Gifted band (145+), in the far right tail of the distribution that popular usage calls 'genius.' Only about one or two people in a thousand reach it. At this extreme, scores describe a tiny, hard-to-measure slice of the population, and the gap between, say, 148 and 152 is largely within measurement noise.
An IQ of 148 in your Cognitive DNA
At the highly gifted level the composite tells you less than the shape behind it. A Cognitive DNA breakdown of a 148 usually shows several strands in the exceptional band, but it also exposes where measurement is shakiest: the further into the tail a score sits, the wider the confidence range on each strand. Reading the profile, not the point, is the responsible approach here.
IQ 148 compared to nearby scores
No short test pins ability to a single point. An IQ of 148 is best read as the centre of a range — roughly 144 to 152 — rather than an exact value, and it is not meaningfully different from scores a few points either side. When you compare two people, overlapping ranges matter more than the point scores.
Where 148 sits on the IQ scale
| IQ Range | Classification | % of People | What it means |
|---|---|---|---|
| ≤69 | Extremely Low | ~2.2% | Well below average. On clinical tests this range may warrant professional assessment. |
| 70–79 | Borderline | ~6.7% | Below average reasoning on this scale. |
| 80–89 | Low Average | ~16.1% | Slightly below the population average. |
| 90–109 | Average | ~50% | The middle of the distribution — where most people score. |
| 110–119 | High Average | ~16.1% | Above average reasoning ability. |
| 120–129 | Superior | ~6.7% | Notably above average — roughly the top 10%. |
| 130–144 | Gifted | ~2.1% | The conventional 'gifted' threshold (130) and above — top ~2%. Mensa qualifies here. |
| 145+ | Highly Gifted | ~0.1% | Exceptionally rare — the far right tail of the distribution. |
Frequently asked questions
Is an IQ of 148 good?+
By the numbers an IQ of 148 is exceptional — well into the top fraction of a percent. Bear in mind that "genius" is a popular label rather than a clinical one, and online tests are least accurate at these extremes.
What percentile is an IQ of 148?+
An IQ of 148 is about the >99th percentile on the standard mean-100, SD-15 scale — meaning you score higher than roughly 100% of people.
How rare is an IQ of 148?+
A score of 148 is about 1 in 1500, based on the normal distribution of IQ in the population.
Does an IQ of 148 qualify for Mensa?+
Yes — Mensa admits people who score at or above the 98th percentile, and an IQ of 148 clears that bar on the SD-15 scale. You still need to qualify on a Mensa-approved or supervised test, not an online estimate.
Is an IQ of 148 genius?+
By the numbers it's exceptional — 148 is in the top tenth of one percent and well past the popular 'genius' line. But 'genius' is a loose popular term rather than a clinical one, and a short online test is least accurate this far out, so treat 148 as a sign of very strong reasoning rather than a precise verdict.
How accurate is an IQ of 148 from an online test?+
Less accurate than scores near the average. The further into the tail a score sits, the fewer people there are to norm against, so precision drops. A 148 reliably indicates exceptionally rare ability, but the exact number carries real uncertainty, especially without supervision.
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