IQ Score Chart | GuideIQ

The IQ score chart is the standard reference for understanding intelligence test results. Whether you scored 85 or 145, this guide explains exactly what your number means, where you rank in the population, and what real-world implications come with each range.

The Complete IQ Score Chart

IQ Score	Classification	Percentile	% of Population
160+	Profound Genius	99.997th+	<0.003%
145–159	Exceptional Genius	99.9th	0.1%
130–144	Gifted / Very Superior	98th	2%
120–129	Superior	91st	7%
110–119	Above Average	75th	16%
90–109	Average	25th–75th	50%
80–89	Low Average	9th	16%
70–79	Borderline	2nd	7%
55–69	Mild Intellectual Disability	<2nd	2%
Below 55	Moderate–Severe Disability	<1st	<1%

What Each IQ Range Means in Real Life

IQ 130+ — Gifted & Genius

Only about 2% of the population scores above 130. People in this range typically excel in academic and professional environments that demand complex problem-solving. Many doctors, lawyers, scientists, and engineers fall here. Above 145 is considered exceptional genius — fewer than 1 in 1,000 people.

Notable IQ 130+ Traits:

Rapid learning and pattern recognition
Strong abstract and analytical thinking
High capacity for complex reasoning
Often qualify for Mensa (top 2%)

IQ 120–129 — Superior

About 7% of people score in this range. Superior intelligence is associated with strong academic performance, leadership roles, and success in demanding careers. Most college graduates and professionals cluster here.

IQ 110–119 — Above Average

Roughly 16% of the population. Above-average intelligence is linked to above-median educational attainment and professional success. People in this range handle complex tasks well and often advance in their careers.

IQ 90–109 — Average

The largest group — about 50% of people. Average IQ doesn't mean limited potential. Most successful people in every field fall in this range. Emotional intelligence, work ethic, and social skills often matter more than raw IQ.

IQ 80–89 — Low Average

About 16% of people. This range is associated with slower academic progress but does not prevent success in many careers and life domains. Practical skills and experience often compensate effectively.

IQ Below 80 — Borderline and Below

Scores below 80 may indicate learning difficulties. Below 70 is the clinical threshold for intellectual disability, though diagnosis requires comprehensive professional evaluation beyond a single test score.

IQ Distribution: The Bell Curve

IQ scores follow a normal distribution (bell curve) with a mean of 100 and standard deviation of 15:

68%

Score between 85–115

95%

Score between 70–130

99.7%

Score between 55–145

How IQ Scores Are Calculated

Modern IQ tests use a deviation IQ system. Your raw score is compared to a normative sample of people your age. The formula places the average at 100 with a standard deviation of 15, meaning:

Each 15-point difference = 1 standard deviation from average
IQ 115 = 1 SD above average (top 16%)
IQ 130 = 2 SD above average (top 2%)
IQ 145 = 3 SD above average (top 0.1%)

What Is a "Good" IQ Score?

There's no single answer — it depends on context. For most everyday purposes, an IQ of 100 (average) is perfectly sufficient. For highly competitive academic programs or professions, 120+ is often advantageous. For Mensa membership, you need to score in the top 2% (IQ 130+).

Key Takeaway

IQ is one measure of cognitive ability — not a measure of worth, potential, or success. Many factors including emotional intelligence, creativity, persistence, and social skills contribute equally or more to life outcomes.

Frequently Asked Questions

What is the average IQ score?

The average IQ is exactly 100 by definition. About 50% of people score between 90 and 110.

What IQ score is considered genius?

Most definitions place genius at IQ 140+, though some use 130+ as the threshold. Mensa accepts the top 2%, which starts around IQ 130.

Can IQ scores change over time?

Yes. IQ can change, especially in childhood and adolescence. Factors like education, nutrition, and cognitive training can influence scores.

Is IQ the best measure of intelligence?

IQ measures specific cognitive abilities well, but intelligence is multidimensional. Emotional intelligence, creativity, and practical skills are not fully captured by IQ tests.

IQ Score Chart: Complete Scale, Ranges & What They Mean

Where Do You Fall on the IQ Scale?