# What Percentage Has an IQ of 110? Top X% and What 'Slightly Above Average' Means

> On a normal distribution with a mean of 100 and an SD of 15, an IQ of 110 is roughly the top 25.2%, about 1 in 4 people, and a deviation score of 56.7. It is slightly above average: not rare, yet clearly above the mean.

- URL: https://brainrank.jp/en/blog/iq-110-percentage
- Published: 2026-07-20
- Updated: 2026-09-04
- Publisher: BrainRank Editorial Team (https://brainrank.jp)

An IQ of 110 can feel like an awkward middle ground — above average, but hardly 'genius.' Where does it actually place you?

## An IQ of 110 is roughly the top 25%

On a normal distribution with mean 100 and SD 15, an IQ of 110 sits +0.67 standard deviations above the mean — roughly the top 25%, or about 1 in 4 people. Converted to a Japanese-style deviation score, that's about 56.7. See [converting between IQ and deviation scores](https://brainrank.jp/en/blog/iq-deviation-conversion) for the mechanics.

## '1 in 4' is a bigger gap than it sounds

In a class of 40, that's around 10th place. People at this level tend to pick up abstract material and adapt to new environments a bit faster — though not so much that the difference stands out in everyday conversation or work. IQ gaps typically become noticeable from [IQ 120](https://brainrank.jp/en/iq/120) to [IQ 130](https://brainrank.jp/en/iq/130) and above.

## Compare with nearby scores

Lined up against [IQ 100](https://brainrank.jp/en/iq/100) (exactly average, top 50%), [IQ 105](https://brainrank.jp/en/iq/105) (top 37%), and [IQ 115](https://brainrank.jp/en/iq/115) (top 16%), an IQ of 110 is clearly above average without being rare. Details for each score are on the [IQ reference pages](https://brainrank.jp/en/iq/110).

## Measure your own position

Many casual online quizzes skew high, so it's best to use a test that [discloses its scoring method](https://brainrank.jp/en/methodology). [BrainRank's free IQ test](https://brainrank.jp/en/start) takes 20 questions in about 10 minutes and returns an IRT-scored estimated IQ and top percentile.

## Frequently asked questions

### What percentile is an IQ of 110?

On a normal distribution with a mean of 100 and an SD of 15, roughly the top 25.2%.

### How rare is an IQ of 110?

Under the same model, about 1 in 4 people.

### What deviation score is an IQ of 110?

Converted to a deviation score with a mean of 50 and an SD of 10, about 56.7.

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Statistics and percentages are calculated from a normal distribution model with a mean of 100 and a standard deviation of 15. The tests on this site provide estimates for entertainment and self-understanding; they are not medical or clinical assessments, nor official intelligence tests.
When citing, credit "BrainRank (brainrank.jp)" and link the article URL.