IQ Scale & Percentile Chart
Exactly where does your score place you in the population?
IQ Score to Percentile Conversion
Based on a normal distribution with mean=100 and standard deviation=15.
How to read the IQ percentile chart
The percentile tells you what percentage of the population scores below your IQ. For example, an IQ of 115 means you scored higher than 84% of people. An IQ of 130 places you in the top 2% — this is the Mensa threshold.
The normal distribution of IQ
IQ scores follow a normal (bell curve) distribution. Most people score near 100, with fewer and fewer people at the extremes. The standard deviation is 15, meaning:
- 68% of people score between 85–115 (within 1 SD)
- 95% score between 70–130 (within 2 SD)
- 99.7% score between 55–145 (within 3 SD)
IQ vs. EQ — what matters more?
Research suggests that while IQ predicts academic and professional success, emotional intelligence (EQ) — the ability to understand and manage emotions — is equally important for relationships and leadership. High EQ combined with high IQ tends to produce the best real-world outcomes.
Frequently Asked Questions
What percentile is an IQ of 120?
An IQ of 120 corresponds to approximately the 91st percentile — meaning you score higher than 91% of the population.
What IQ is considered genius?
Genius is typically associated with IQ scores of 140 and above (top 0.4%). However, "genius" is a colloquial term — no standard scientific definition exists.
What is the rarest IQ score?
Scores at the extremes of the scale (below 55 or above 145) are the rarest, occurring in fewer than 1 in 1,000 people. A score of 160 appears in roughly 1 in 30,000 people.
How accurate is an online IQ test percentile?
Online IQ tests provide a good estimate with a typical margin of error of ±5–10 IQ points. For precision, a clinical assessment by a licensed psychologist is recommended.
Find your percentile
Take our free IQ test and see exactly where you rank in the population.
Take the Free IQ Test