Superior intelligence, strong reasoning, roughly top 10% · Rarer than 1 in 16
🏛️ Mensa cutoff 130 — 7 points away
🌍 In the United States (national average ≈ 98, an estimate from test samples), an IQ of 123 is in the top 4.8%.
What an IQ of 123 means. Smarter than 93.7% of people. Classification: Superior — Superior intelligence, strong reasoning, roughly top 10%. Rarer than 1 in 16.
IQ
Classification
Percentile
100
Average
50.0%
120
Superior
90.9%
130
Very Superior / Gifted
97.7%
❓ FAQ
Is an IQ of 123 a good score?
An IQ of 123 falls in the "Superior" range and is higher than 93.7% of the population.
What percentile is an IQ of 123?
An IQ of 123 sits at the 93.7th percentile — the top 6.3% of the population. Roughly 1 in 16 people score this high.
Can you join Mensa with an IQ of 123?
Mensa requires roughly IQ 130 (top 2% on SD15); 123 is 7 points below the cutoff. Practice and a supervised test may close the gap.
How many people have an IQ of 123 or higher?
Roughly 507,034,831 people worldwide — about 6.3% of 8.1 billion.