Average IQ for Children (Ages 6–12)
Typical IQ Range
90–110
Age-normed average is always 100
IQ and Children (Ages 6–12)
IQ testing in children measures developing cognitive abilities relative to same-age peers. Children's IQ scores can be more variable than adult scores because the brain is still rapidly developing. A child's score at age 7 may differ significantly from their score at age 12 as different cognitive abilities mature at different rates. The WISC (Wechsler Intelligence Scale for Children) is the most commonly used test for this age group, assessing verbal comprehension, perceptual reasoning, working memory, and processing speed.
For a full explanation of how IQ scores work and what they measure, see our complete guide to IQ. To understand what different score levels mean, check our IQ score ranges page.
Key Factors Affecting IQ at This Age
Environmental factors have an outsized impact on children's IQ scores. Nutrition, stimulation, reading exposure, parental engagement, sleep quality, and access to education all significantly influence cognitive development during these critical years. Children from enriched environments consistently score higher, and early interventions like quality preschool programs have been shown to boost IQ by 4–7 points. The Flynn Effect — rising IQ scores over generations — is strongest in children, suggesting environmental improvements disproportionately benefit developing brains.
IQ Across the Lifespan
| Age Group | Typical Range | Key Trend |
|---|---|---|
| Children (Ages 6–12) | 90–110 | Rapid development, high variability |
| Teenagers (Ages 13–17) | 90–110 | Stabilizing, prefrontal cortex developing |
| Young Adults (Ages 18–25) | 90–110 | Fluid intelligence peaks |
| Adults (Ages 26–50) | 90–110 | Most stable period |
| Older Adults (Ages 50–65) | 90–110 | Knowledge peaks, speed declines |
| Seniors (Ages 65+) | 85–105 | Crystallized stays, fluid declines |
Frequently Asked Questions
What is a normal IQ for a child?
A normal IQ for a child is the same as for an adult: 90–110 is considered average. Children's IQ tests are age-normed, meaning a child's score reflects their performance relative to other children of the same age. About 68% of children score between 85 and 115.
Can a child's IQ change over time?
Yes, significantly. Children's IQ scores can shift by 10–20 points between ages 6 and 18 as different cognitive abilities develop at different rates. Early testing is less predictive of adult IQ than testing in adolescence. Environmental changes like improved nutrition or education can also raise scores.
Should I get my child's IQ tested?
IQ testing is most useful when there's a specific concern — identifying giftedness for enrichment programs, or diagnosing learning disabilities for support services. Routine IQ testing of all children is not recommended, as scores at young ages are less stable and can create unnecessary labeling.
Explore Other Age Groups
Take our free IQ test to see where you stand, or learn how to improve your IQ at any age.