An IQ of 124 sits in the high range, around the 94.52th percentile. Here is what that means, and what it does not.
Reference score
124
Percentile
94.52%
At or above
1 in 18
Reference scale
100 mean / 15 SD
Prepared by IQInsight · Calculation guide · Updated
124 and 125 can share a rounded label while having different percentiles.
An IQ of 124 is 24 points above the reference mean, or 1.6 standard deviations. The model places about 94.52% of values below it, leaving 5.48% at or above it: approximately one in 18. Rounding the percentile to a whole number gives 95, which can hide the difference from the neighboring score of 125.
At 125 the corresponding percentile is about 95.22, approximately 0.70 percentile points higher. The upper tail changes from about 5.48% to 4.78%. These are mathematically different positions. Whether a one-point difference between measured scores is informative is a separate question that needs the test’s reliability and precision evidence.
How the percentile is calculated.
The reference uses a mean of 100 and a standard deviation of 15. First convert the score to a z-score, then find the area below it on the standard normal curve.
Theoretical normal distribution. Mean 100, standard deviation 15. This does not measure your IQ or compare you with IQInsight users.
Put the number in perspective.
In a normal distribution with mean 100 and standard deviation 15, about 5.48% of scores fall at or above 124. That is approximately one in 18. The figure describes the reference model; it is not a count of people we have tested.
The quality of the test matters.
A number alone does not show how accurately it was measured. An established, professionally administered test has supporting evidence and defined interpretation rules. An online exercise without representative norms cannot establish the same conclusions.
Nearby scores on the same scale.
Theoretical percentiles, mean 100 and standard deviation 15
If a decision seems to turn on 124 versus 125, check the original test’s rules and precision rather than rounding the score yourself. A rounded percentile label can hide the mathematical difference, but that difference alone does not establish a meaningful difference between people.
A score alone cannot tell you how a person thinks through a problem. This published sample illustrates a reasoning method; it is not calibrated to a 124 IQ level and does not predict a score.
Double the current term, then add the next counting number, starting with +1: 3, 7, 16, 35, 74. What comes next?
A. 148
B. 149
C. 152
D. 153
Reveal the answer and reasoning
Answer: 153. The additions are +1, +2, +3 and +4. The next transition is 74×2+5=153.
Check an alternative: 148. Doubling 74 leaves out the addition.
Try this approach. Write both parts of every transition and advance the changing part.
This is one of our public sample questions. Seeing the solution may make a future attempt more familiar. Explore the sample report to see how answers are explained.
A few things you might be wondering.
Clear answers, before you begin.
Why do some guides put both 124 and 125 at the 95th percentile?+
They are rounding. The values are about 94.52 and 95.22 respectively on this model. A shared rounded label does not make the underlying values identical, nor does the mathematical difference prove that a test can distinguish two people that precisely.
Is 124 a good IQ score?+
On a theoretical scale with mean 100 and standard deviation 15, 124 is in the high range, around the 94.52th percentile. Whether a particular test result supports that interpretation depends on the quality and standardization of that test.
How rare is an IQ of 124?+
Under that normal-distribution model, about 5.48% of values are at or above 124, approximately 1 in 18. This is a mathematical reference, not observed IQInsight user data.
Does this number describe all of my abilities?+
No. IQ scores do not describe every skill, interest, quality or circumstance. A score on an unstandardized online exercise is especially limited and should not be treated as a diagnosis or a prediction of personal success.
Can I compare scores from different tests?+
Only with care. Tests can differ in norms, scales, questions, administration and reliability. Similar-looking numbers are not necessarily equivalent measurements.
Can I get my result without paying?+
Yes. IQInsight is designed to provide the estimated score, theoretical percentile and all four domain breakdowns for free. The optional report explains the answers in more detail.
