What does an IQ of 128 mean?
An IQ of 128 falls in the Superior band (120–129) — roughly the top tenth of the population. Scoring higher than about 97% of people, 128 reflects strong abstract reasoning that's noticeably above average without yet reaching the "gifted" threshold of 130.
- Classification
- Superior
- Percentile
- 97th
- Scores higher than
- 97% of people
- Rarity
- about 1 in 32
- vs. average (100)
- +28 points
Key takeaways
- An IQ of 128 is classified as Superior (120–129).
- It is about the 97th percentile — higher than 97% of people.
- The Superior band is roughly the top 10% of scores.
Is an IQ of 128 good?
Yes — an IQ of 128 is a strong result, placing you in roughly the top 10%. Reasoning at this level tends to make complex, abstract material easier to absorb. It's still one dimension of ability, though: what you do with that reasoning depends on focus, curiosity, and the skills you build.
How rare is an IQ of 128?
An IQ of 128 is uncommon: only about 3% of people score this high — in a random group of 1,000, roughly 31 would reach 128 or above.
What an IQ of 128 looks like in practice
At this level people often gravitate to analytically demanding work and pick up new technical material quickly. The advantage is meaningful, but it sits alongside — not above — traits like persistence and judgement.
What makes an IQ of 128 distinctive
At 128 you're at the upper edge of the Superior band, just two points below the gifted threshold of 130 and the typical Mensa entry line. It's a genuinely uncommon score — higher than about 97% of people — sitting right at the boundary where 'superior' shades into 'gifted.'
An IQ of 128 in your Cognitive DNA
A score this close to the gifted line is usually carried by several strong strands. In the Cognitive DNA view, 128 profiles often show multiple abilities in the 'strong' or 'exceptional' band, with the composite held just under 130 by one or two more average areas. For someone at 128, the breakdown answers the more interesting question: which specific reasoning strengths are doing the heavy lifting.
IQ 128 compared to nearby scores
No short test pins ability to a single point. An IQ of 128 is best read as the centre of a range — roughly 124 to 132 — 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 128 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 128 good?+
Yes. An IQ of 128 is well above average, in roughly the top 10% of the population, and reflects strong abstract reasoning.
What percentile is an IQ of 128?+
An IQ of 128 is about the 97th percentile on the standard mean-100, SD-15 scale — meaning you score higher than roughly 97% of people.
How rare is an IQ of 128?+
A score of 128 is about 1 in 32, based on the normal distribution of IQ in the population.
Does an IQ of 128 qualify for Mensa?+
Not quite. Mensa requires the 98th percentile (about IQ 130 on this scale), and 128 falls just below it. A supervised test is the only way to qualify — online scores are estimates.
Is an IQ of 128 gifted?+
Not by the usual cutoff. 'Gifted' conventionally begins at 130, so 128 falls two points short and is classed as Superior (120–129). In practice the difference between 128 and 130 is within the margin of error of any single test.
What is the difference between an IQ of 128 and 130?+
Mostly a label. 130 is the conventional gifted and Mensa threshold and 128 sits just below it, but a two-point gap at this part of the scale is well within a single test's margin of error — the two reflect very similar ability.
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