What does an IQ of 133 mean?
An IQ of 133 is classified as Very high intelligence. It is higher than 99% of people — roughly 1 in 72.
Higher than
99%
How rare
1 in 72
From the average
+2.20
Classification
Very high intelligence
IQ scores follow a bell curve centred on 100, with a standard deviation of 15. About 68% of people score between 85 and 115, and about 95% between 70 and 130.
What it means in practice
Mensa admits the top 2% — about IQ 130 on a test with a standard deviation of 15. A score of 133 clears that line, so it would qualify on most tests Mensa accepts.
Mensa practice test →
No test measures IQ exactly. A typical standard error is about 5 points, so a result of 133 really means "somewhere between 128 and 138" — and a second test on another day can land anywhere in that range.
For a child the number compares them with others of the same age, not with adults. IQ scores are age-normed, so a 10-year-old and a 40-year-old with the same score are each equally far ahead of their own age group.
Curious where you would land? Take the free 60-question test and find out.