What Does an IQ of 78 Mean?

An IQ of 78 is in the “Borderline” range. About 7.1% of people score lower and 92.9% score higher. It’s 1.47 standard deviations below the average of 100.

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Where an IQ of 78 sits on the bell curve (average 100, standard deviation 15)

IQ 78 in numbers

Classification
Borderline
Scores lower than 78
7.1%
How rare
1 in 14 people score this low or lower
Distance from average
-1.47 standard deviations
Mensa level (top 2%)
No, Mensa usually needs about 130+

What the “Borderline” range means

Scores from 70 to 79 are called borderline. About 7% of people are in this range. An online test can easily be off by several points, so a single low score shouldn’t be taken too seriously.

How does IQ 78 compare?

IQScores lowerClassification
681.6%Extremely low
733.6%Borderline
787.1%Borderline
8312.9%Low average
8821.2%Low average

Frequently asked questions

Is an IQ of 78 good?

An IQ of 78 is below average, but online tests are only estimates. Tiredness or distraction can lower a score by several points.

What percentile is an IQ of 78?

An IQ of 78 is higher than about 7.1% of the population, and about 92.9% of people score higher.

How rare is an IQ of 78?

About 1 in 14 people score 78 or lower.