Anywhere from 90 to 109 is considered average, and most people land there. A "good" score, in the everyday sense people mean when they type this question into Google, is typically anything from 100 upward — but the honest answer is that "good" depends on what you're comparing it to, and the number alone doesn't tell the whole story.
Let's unpack what IQ actually measures and why the scale is built the way it is, so the number means something to you instead of just being a mystery figure.
What does IQ actually mean?
IQ stands for intelligence quotient — a score designed to rank your reasoning and problem-solving ability against the general population, not against some fixed, universal standard. There's no absolute ruler for "intelligence" the way there is for height or weight. Instead, IQ tests compare your performance on a set of reasoning tasks (things like pattern recognition, working memory, spatial logic, and vocabulary) to the performance of a large, representative sample of other people who took the same test.
That comparison is what makes a score meaningful. A 115 doesn't mean "115 units of smartness." It means you scored higher than a specific, well-defined chunk of the population.
Why 100 is the magic number
Test designers set the mean IQ (the mathematical average score across the whole population) at exactly 100. That's not a coincidence — it's a deliberate design choice. Every time a test is built or updated, it's calibrated so that the average person taking it scores 100.
Scores are then spread out above and below that midpoint using something called the standard deviation (SD) — a statistical measure of how spread out scores are from the average. Most IQ tests use an SD of 15. That single number is the key to reading the entire scale, because it tells you how far a given score is from "typical."
The IQ scale, explained with the bell curve
IQ scores follow a bell curve (technically a normal distribution) — a symmetrical, bell-shaped pattern where most people cluster near the middle and fewer people appear as you move toward the extremes in either direction. Picture a hill: the peak is at 100, and the slopes taper off evenly on both sides.
Because the SD is 15, we can map out roughly how many people fall into each band:
| IQ range | Classification | Roughly what % of people |
|---|---|---|
| Below 70 | Extremely low | ~2% |
| 70–84 | Below average | ~14% |
| 85–99 | Average (lower half) | ~34% |
| 100–114 | Average (upper half) | ~34% |
| 115–129 | Above average | ~14% |
| 130–144 | Gifted | ~2% |
| 145+ | Highly gifted | <1% |
Notice how the bulk of humanity — about 68% — sits between 85 and 115. That's one standard deviation in either direction from the mean. Move two standard deviations out (below 70 or above 130) and you're already down to about 2% of people on each end. This is why a score like 130 is considered rare and notable, while a score of 108 barely raises an eyebrow — it's still comfortably within the average range.
So, what is a good IQ score?
Given all that, here's the practical breakdown:
- 90–109: Squarely average. This is where most people land, and it's genuinely nothing to worry about — it means your reasoning ability is right in line with the general population.
- 110–119: High average. Comfortably above the midpoint, often associated with strong academic or professional performance, though far from rare.
- 120–129: Superior. This band covers roughly the top 10% or so of scorers — a solidly high score by most everyday standards.
- 130 and above: Often labelled "gifted" territory. Only about 2 in 100 people score this high.
If someone asks "is 115 a good IQ score?" — yes, it's above average and puts you ahead of a solid majority of test-takers. If someone asks whether 100 is good, the answer is also yes: it's literally average, which is a perfectly healthy, typical result, not a disappointing one.
A common misconception worth clearing up
A lot of people assume average means mediocre. It doesn't. Average, by definition, describes where most of humanity sits — including plenty of successful, sharp, capable people. IQ measures a specific kind of reasoning ability; it doesn't capture creativity, emotional intelligence, practical skills, motivation, or the dozens of other traits that shape a person's success and character. A "good" score is context-dependent, not a verdict on your worth or potential.
Does a good IQ score depend on age?
Yes, and this trips a lot of people up. Raw performance on reasoning tasks tends to shift across the lifespan — for example, processing speed often peaks in early adulthood — so tests adjust for age. This adjustment uses norms: reference data built from testing large groups of people within specific age brackets, so a 10-year-old's raw answers are compared to other 10-year-olds, not to adults.
That's why the final IQ number is already age-adjusted by the time you see it. A 12-year-old and a 45-year-old can both score 115, and it means the same thing for each of them: both performed better than roughly 84% of people their own age.
What about "high IQ" scores specifically?
High IQ generally starts being used around 120–130 and up, with 130+ often serving as the threshold some high-IQ societies use for membership eligibility. Above 145 is genuinely rare — you're talking about less than 1 in 1,000 people.
It's worth noting that at the very top of the scale, small score differences matter less than people assume. The tests get statistically noisier at the extremes because fewer people in the norming sample scored that high, so precision drops. A 148 versus a 152 isn't a meaningfully different level of ability — both are simply "very high."
A quick reality check on percentiles
Percentile is another term worth defining clearly: it tells you the percentage of people who scored at or below a given point. An IQ of 100 sits at the 50th percentile — half the population scores at or below it, half above. An IQ of 130 is around the 98th percentile — you'd have outscored about 98 out of 100 people who took the same test.
Percentiles are often more intuitive than raw IQ numbers because they translate the score directly into "how many people did I do better than," without needing to think in standard deviations at all.
Key takeaways
- A good IQ score, in plain terms, is anything at or above 100, since that's the population average.
- Scores from 90–109 are average; 110–129 is above average to superior; 130+ is considered gifted and is statistically rare.
- The scale is built around a mean of 100 and a standard deviation of 15, which is why 68% of people fall between 85 and 115.
- IQ is age-adjusted, so scores are always compared against same-age peers.
- A single score never captures the full picture of someone's intelligence, creativity, or potential.
One last honest note: iqmetria's test, like any online IQ test, is orientative — a fun, informative snapshot for self-knowledge, not a clinical or medical diagnosis. If you're curious about cognitive concerns beyond curiosity, a licensed professional using a validated, proctored instrument is the right path.
FAQ
What is considered a good IQ score?+
Anything from 100 upward is generally considered good, since 100 is the population average. Scores of 110-129 are viewed as above average to superior, and 130+ is considered gifted.
Is 120 a good IQ score?+
Yes. A score of 120 falls in the superior range, roughly ahead of about 90% of the population, making it a solidly high result without being statistically rare.
What is the average IQ?+
The average IQ is 100 by design, since every test is calibrated so the general population's mean score lands exactly there, with most people scoring between 85 and 115.
What percentage of people have a high IQ?+
About 2% of people score 130 or above, and fewer than 1% score above 145, since the bell-curve distribution thins out sharply at the extremes.
Does IQ change with age?+
Your relative IQ ranking tends to stay fairly stable, but tests adjust scores using age-specific norms so you're always compared fairly against people your own age.