Normal IQ Range

The normal IQ range is commonly 85–115—about 68% of people on SD-15 scales. Chart the bands, percentiles, and when average still needs support.

Who This Article Is For

Anyone asking whether their score is 'normal' or what average IQ looks like in numbers.

Key Takeaways

On SD-15 tests, ~68% of scores fall between 85 and 115—the statistical 'normal' band.

IQ 90–109 is often labeled average; 110–119 high average—labels vary by manual.

Normal ≠ unimportant: school supports and career fit still matter inside the band.

See what IQ is considered average and score scale.

Direct Answer: What Is the Normal IQ Range?

Most psychologists treat roughly 85–115 as the normal or average range because it covers about one standard deviation below and above the mean of 100 on SD-15 scales. That is where most people land—not a judgment of value.

Reference framing: APA Intelligence and percentile intuition via IQ percentile chart.

Mean: 100
Normal band: ~85–115 (≈68%)
Broader 'average labels': often 90–109
Outside band: still common—millions score above 115 or below 85

Normal Range Chart (SD 15)

Use this as a reading aid—not a diagnosis:

70–84 — Below average / borderline depending on manual
85–89 — Low average (still within ~1 SD for many interpretations)
90–109 — Average
110–119 — High average
120–129 — Superior
130+ — Very superior / gifted thresholds (program-dependent)

Why People Worry Inside the Normal Band

Workplace cognitive screens and gifted cutoffs create anxiety even when scores are statistically normal. Focus on skills, sleep, and anxiety management rather than chasing points inside 95–105.

Normal Range vs State Averages

U.S. state averages near 95–104 still sit inside or near the normal band nationally. Florida, Kentucky, and Mississippi discussions belong in geographic context—not personal panic: Florida, Kentucky, Mississippi.

Sources & further reading

External links open authoritative references used to fact-check this article. GuideIQ summarizes research; always read primary sources for clinical or legal decisions.

APA — Intelligence
Official psychology overview of intelligence and testing limits.
APA Dictionary — normal distribution
Why 68% falls within ±1 SD.
NCES — Education statistics
U.S. education data used as context for state cognitive proxies.

Common Interpretation Mistakes

Calling only IQ 100 'normal' and everything else broken.

Using different test manuals' labels interchangeably.

Ignoring measurement error of ± a few points.

90-Day Action Plan

Locate your score on the chart above.

Convert to percentile.

Decide if you need clinical testing or just skill building.

Frequently Asked Questions

Is 100 a normal IQ?

Yes—100 is the designed average.

Is 85 normal or low?

85 sits at the lower edge of the common normal band (~16th percentile).

Is 115 normal or high?

115 is about the 84th percentile—high average / top of the broad normal band.

Do children use the same normal range?

Yes on deviation IQ, but age norms differ—use child-specific tests.

What if I'm below 85?

Seek professional interpretation; one online score is not a diagnosis.

Normal IQ Range: What Scores Count as Average (85–115)

IQ Test — 3 Minutes