Louison Martins Tahon Health Tools Writer Making health calculators...
The IQ Percentile Calculator converts an IQ score into a population percentile and rarity estimate. It uses the normal distribution with a mean of 100 and standard deviation of 15 (Wechsler scale).
A percentile of 84 means you scored higher than 84 % of the population. IQ tests measure specific cognitive abilities and are not a complete measure of intelligence or potential.
Mean IQ: 100 (by definition). 68 % of people score 85–115. 95 % score 70–130. Only 2.2 % score above 130 (gifted).
| IQ Range | Classification | Percentile | Rarity |
|---|---|---|---|
| Very low | 1 in 44 | ||
| 70 – 84 | Below average | 2nd – 14th | 1 in 6 |
| 85 – 115 | Average | 16th – 84th | 2 in 3 |
| 116 – 130 | Above average | 84th – 98th | 1 in 6 |
| 131 – 145 | Gifted | 98th – 99.9th | 1 in 44 |
| > 145 | Highly gifted | > 99.9th | 1 in 741 |
The IQ Percentile Calculator estimates how an intelligence quotient (IQ) score compares to the general population by converting it into a percentile ranking. Percentiles indicate the percentage of people who score below a given IQ value on standardized intelligence tests.
Most modern IQ tests are designed so that scores follow a normal distribution with an average (mean) of 100 and a standard deviation of 15. Using these statistical parameters, the calculator estimates where a particular IQ score falls within the population distribution.
Louison Martins Tahon Health Tools Writer Making health calculators...
An IQ percentile represents the relative standing of an IQ score within a standardized population sample. For example, an IQ score in the 90th percentile means the individual scored higher than approximately 90% of the population taking the same standardized test.
The IQ Percentile Calculator relies on the statistical properties of the normal distribution used in modern intelligence testing. With a mean score of 100 and a standard deviation typically set at 15, percentiles can be estimated by determining how far a score deviates from the population average.
This percentile interpretation provides more context than the raw IQ score alone. Two individuals may both score above average, but percentile ranking helps clarify how rare or common a particular score is within the broader population.
Understanding this calculator can raise questions. Here you’ll find clear, evidence-based answers to help you interpret your results and understand the science behind it.
An IQ percentile indicates the percentage of people in the population who scored lower than a particular IQ value on a standardized intelligence test. For example, the 75th percentile means the score is higher than 75% of test takers.
The average IQ score is 100, which corresponds to the 50th percentile. This means that approximately half of the population scores above and half scores below this value.
An IQ score around 119–120 typically corresponds to approximately the 90th percentile on tests with a mean of 100 and a standard deviation of 15.
Most modern IQ tests are standardized to follow a normal distribution, but exact percentiles may vary slightly depending on the test design, sample population, and standardization method used.
The IQ Percentile Calculator helps translate a raw IQ score into a percentile ranking, making it easier to understand how a result compares within the broader population. Percentiles provide context by showing the proportion of individuals scoring below a given value.
By using the IQ Percentile Calculator, individuals can better interpret standardized intelligence scores and understand their relative position within the statistical distribution used in cognitive testing.
