Statistical Reference
IQ Percentile Chart
Understand exactly where your IQ score ranks you compared to the global population. Our comprehensive chart breaks down every score range with clear explanations.
50% Score 90-110
Half of all people fall within the average range
Top 2% = 130+
Mensa qualification threshold
68% Score 85-115
One standard deviation from mean
Top 0.1% = 145+
Genius-level classification
Complete IQ Percentile Reference
The table below shows IQ score ranges, their corresponding percentiles, classifications, and rarity in the population.
| IQ Range | Percentile | Classification | Rarity |
|---|---|---|---|
145+ | 99.9% | Genius | 1 in 1,000 |
130-144 | 98-99.9% | Very Superior | 1 in 50 |
120-129 | 91-97% | Superior | 1 in 10 |
110-119 | 75-90% | High Average | 1 in 4 |
90-109 | 25-74% | Average | 1 in 2 |
80-89 | 10-24% | Low Average | 1 in 4 |
70-79 | 3-9% | Borderline | 1 in 10 |
Below 70 | < 3% | Extremely Low | 1 in 50 |
Understanding IQ Percentiles
IQ percentiles provide a more intuitive way to understand your score than raw numbers alone. While an IQ of 115 might not seem dramatically different from 100, understanding that it places you in the top 16% of the population gives crucial context.
The IQ scale follows a normal distribution (bell curve) with a mean of 100 and a standard deviation of 15. This means:
- 68% of people score between 85 and 115
- 95% of people score between 70 and 130
- 99.7% of people score between 55 and 145
IQ Score Distribution
557085100115130145
The bell curve shows how IQ scores are distributed in the population
Frequently Asked Questions
What does IQ percentile mean?
Your IQ percentile indicates what percentage of the population scored lower than you. For example, the 90th percentile means you scored higher than 90% of people.
What percentile is an IQ of 100?
An IQ of 100 is the 50th percentile, meaning you scored higher than 50% of the population. This is the average IQ score.
What IQ is needed for the 99th percentile?
An IQ of approximately 135 or higher places you in the 99th percentile, meaning you score higher than 99% of the population.
How is IQ percentile calculated?
IQ percentiles are calculated using the normal distribution curve with a mean of 100 and standard deviation of 15. Your score is compared to this distribution.