What Is the Average IQ? A Complete Guide

What Is IQ and How Is It Measured?

IQ (Intelligence Quotient) is a standardized score of cognitive abilities. The average IQ in the population is defined as 100 points with a standard deviation of 15 points.

This means:

68% of the population has an IQ between 85 and 115

95% of the population has an IQ between 70 and 130

Only 2% of the population has an IQ above 130

How Does the IQ Scale Work?

IQ ScoreClassification% of Population |----------|---------------|-----------------| 130+Very Superior2% 120–129Superior7% 110–119High Average16% 90–109Average50% 80–89Low Average16% 70–79Below Average7%

What Influences IQ?

Research shows that IQ is influenced by a combination of genetic factors (approximately 50%) and environmental factors:

Education — each year of schooling adds an average of 1–5 IQ points

Nutrition — iodine deficiency in early childhood reduces IQ by 10–15 points

Exercise — regular physical activity improves cognitive function

Sleep — chronic sleep deprivation reduces cognitive performance

Can IQ Be Increased?

Yes — especially through:

Cognitive training (logic games, puzzles, chess)

Reading — expands vocabulary and abstract thinking

Learning new languages — strengthens executive brain functions

Meditation — improves concentration and working memory

How to Find Your IQ?

The most reliable method is a standardized IQ test administered by a psychologist. Online tests like IQboost provide a good approximation that correlates well with professional results.

Remember that average IQ is just a number — emotional intelligence (EQ), creativity, and practical skills are equally important for success in life.