IQ 108: what it means, percentile and how rare it is

An IQ score of 108 is higher than about 70.3% of people, which puts it in the 70th percentile. Roughly 1 in 3.4 people score higher than 108. On the WISC-V it is classified as Average.

Percentile: 70th
Higher than: 70.3%
People scoring higher: 1 in 3.4
WISC-V classification: Average

Where an IQ of 108 falls on the bell curve. The shaded area is the 29.7% of people who score higher. (+0.53 SD)

What does an IQ of 108 mean?

In a group of 100 people, about 30 would score higher than 108.

About half of all people score between 90 and 109, the Average range. 100 is the exact middle of the scale by design: tests are normed so that the average adult or child of a given age scores 100.

Within this range, differences of a few points mean very little. Once measurement error of about ±5 points is taken into account, a 96 and a 104 are effectively the same result.

An average score is not a limit. Most people in every career and walk of life score in or near this range, and knowledge, skills, effort and personality explain far more about day-to-day success than a few IQ points.

IQ 108 on other scales and tests

Different tests spread scores differently. The same rank as an IQ of 108 on an SD-15 test gives these numbers elsewhere:

Scale	Equivalent score	Classification
SD 15: WISC-V, WAIS, Stanford-Binet 5	108	Average
WAIS-IV (older label)	108	Average
Stanford-Binet 5	108	Average
SD 16: older Stanford-Binet, Cattell Culture Fair	109	–
SD 24: Cattell III B	113	–

How precise is an IQ score of 108?

No test measures IQ exactly. On individually administered tests such as the WAIS, the full-scale score comes with a 95% confidence interval of roughly ±5 points, so a result of 108 is best read as "probably somewhere between 103 and 113". Scores can also shift a few points between different tests or after a few years.

Online tests, including ours, are self-assessments. They are useful for curiosity and practice, but they are not a substitute for an assessment by a psychologist.

IQ scores near 108

IQ score	Percentile	Higher than	WISC-V classification
103	58th	57.9%	Average
104	61st	60.5%	Average
105	63rd	63.1%	Average
106	66th	65.5%	Average
107	68th	68%	Average
108	70th	70.3%	Average
109	73rd	72.6%	Average
110	75th	74.8%	High Average
111	77th	76.8%	High Average
112	79th	78.8%	High Average
113	81st	80.7%	High Average

Check another IQ score

IQ score

Test scale (standard deviation)

Or start from a percentile

For example 98 for the top 2%.

Percentile: 70th
Higher than: 70.3%
People scoring higher: 1 in 3.4
Classification (WISC-V): Average

IQ 108: frequently asked questions

Is an IQ of 108 good?+

An IQ of 108 is an average score: it is in the range where half of all people fall and it is higher than about 70.3% of people. It is a typical result, and it does not limit what you can learn or do.

What percentile is an IQ of 108?+

An IQ of 108 is in the 70th percentile on a scale with mean 100 and standard deviation 15. It is higher than about 70.3% of people and lower than about 29.7%.

How rare is an IQ of 108?+

Roughly 1 in 3.4 people score higher than 108. In a group of 1,000 people you would expect about 297 to score higher.

Is 108 above average?+

Slightly, but not in a meaningful way. 108 is a little above the mean of 100, yet it is still inside the Average range (90 to 109), and the difference is smaller than the typical ±5-point measurement error.