IQ Percentile Calculator

Category: Other Health

- July 25, 2025

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Quickly find out what your IQ score means with this calculator. See your percentile rank, rarity, and how you compare to the general population.

Enter IQ Score Information

IQ Score:

IQ Test Type:

Advanced Options

Decimal Places:

Show Statistical Details

IQ Score Percentile Results

Percentile Rank

50.00

Z-Score

0.00

IQ Score

100

Percentile Visualization

Statistical Details

Position Relative to Mean:
Rarity (1 in X people):
Standard Deviations from Mean:
Population Above This Score:
Population Below This Score:

Interpretation

This IQ score is at the 50th percentile, which means it falls exactly at the population average. Approximately 50% of people score above this level, and 50% score below.

IQ Classification

IQ Range	Classification	Percentile Range	% of Population
130+	Very Superior	98+	2.2%
120-129	Superior	91-97	6.7%
110-119	High Average	75-90	16.1%
90-109	Average	25-74	50.0%
80-89	Low Average	9-24	16.1%
70-79	Borderline	2-8	6.7%
Below 70	Extremely Low	Below 2	2.2%

About IQ Scores and Percentiles

IQ (Intelligence Quotient) scores are standardized test scores designed to assess human intelligence. Most modern IQ tests are constructed so the average (mean) score is 100, with a standard deviation of 15.

The Normal Distribution

IQ scores follow a normal distribution, also known as a bell curve. In this distribution:

Approximately 68% of the population scores between 85 and 115 (within 1 standard deviation of the mean)
Approximately 95% of the population scores between 70 and 130 (within 2 standard deviations)
Approximately 99.7% of the population scores between 55 and 145 (within 3 standard deviations)

Percentiles vs. IQ Scores

A percentile rank indicates the percentage of people who score at or below a given score. For example:

An IQ of 100 corresponds to the 50th percentile (exactly average)
An IQ of 115 corresponds to the 84th percentile (better than 84% of people)
An IQ of 85 corresponds to the 16th percentile (better than 16% of people)

Common IQ Tests

Wechsler Intelligence Scales (WAIS, WISC): Mean = 100, SD = 15
Stanford-Binet Intelligence Scales: Mean = 100, SD = 15
Raven's Progressive Matrices: Mean = 100, SD = 15

While most modern tests use the same statistical parameters, interpretation guidelines may vary between tests.

Limitations

It's important to understand that:

IQ is just one measure of cognitive ability and doesn't capture all aspects of intelligence
Test results can be affected by factors like test anxiety, cultural bias, and environmental factors
IQ scores should be interpreted by qualified professionals, especially for clinical or educational purposes
This calculator provides statistical information only and is not a substitute for professional assessment

Understanding the IQ Percentile Calculator

The IQ Percentile Calculator is a handy tool that helps you find out how your IQ score ranks compared to others. By entering your IQ score and selecting the type of IQ test you took, you can see where you stand in percentage terms. This can give you valuable insights into your cognitive abilities and how they compare to the general population.

Why IQ Percentiles Matter

Knowing your IQ percentile can be quite useful. It shows how your score relates to others. Here’s how it can help you:

Understand your cognitive strengths and weaknesses.
Gain perspective on your performance in academic or professional contexts.
Identify areas for personal growth and development.

Inputting Your IQ Score

The calculator requires you to enter your IQ score, which can range from 40 to 200. You also need to select the type of IQ test you took, like Wechsler or Stanford-Binet. Each test has its distribution, and this tool adjusts to provide accurate results based on your entries.

Custom Distribution Options

If you’re using a less common IQ test, you can enter custom values. This includes setting your own mean and standard deviation. These options allow the calculator to cater to different testing standards, ensuring your results are more precise and relevant to your situation.

Understanding the Results

When you get your results, you’ll see your percentile rank, Z-score, and IQ score. The percentile rank tells you what percentage of the population scored at or below your score. A higher percentile indicates a better performance compared to others. For example, a 50th percentile means you scored exactly at the average level.

Visualizing Your Percentile

The calculator provides a visual representation of your score on a bell curve. This can help you to easily see how your IQ score fits within the larger population. It’s a simple yet effective way to grasp the distribution of IQ scores around you.

Statistical Insights Available

Alongside your main results, the calculator offers additional statistical details. You can learn about your position relative to the mean, how rare your score is, and the estimated populations above and below your score. This information can further enhance your understanding of your IQ score.

Learn More About IQ Scores

The tool also explains the basics of IQ scores and percentiles. It covers how IQ tests are designed, the common types of tests, and the significance of the normal distribution. Knowing these fundamentals can deepen your appreciation of where you stand and what your score means.