IQ 123

123 is 23 points above average and 1.53 standard deviations up. You score higher than 93.7% of people, so in a class of 30 you would typically be one of the top 2. It sits 8 points into the above-average band, 7 short of the 130 mark often used for gifted programmes.

This is a common range among people in academic and professional work, but it is far from a requirement. Plenty of people outside it do the same jobs well.

Most people at 123 were never labelled gifted at school, and many never took a formal test. It is the kind of score people underrate because it does not come with a label.

Careers are chosen, not assigned by score. Research on general mental ability, summarised in work such as Schmidt and Hunter (1998), suggests a 123 helps most in complex roles and during training.

Where you end up depends heavily on interest, persistence and people skills. None of those is measured by an IQ test.

If you are choosing a path, treat 123 as a reason to take on demanding material, not as a filter on which options are open to you.

The difference between 123 and 100 rarely looks like brilliance. It tends to look like this:

• New tools and apps feel intuitive faster, because you infer how they work.
• Long instructions are easier to hold in mind without writing them down.
• Skills such as writing, coding or playing an instrument still take years of practice to master.

Scoring 123 or higher is a 6.3% share of everyone. Scaled up to whole populations, that works out as:

Going from 118 to 123 makes a score 1.8 times rarer, and going on to 128 multiplies the rarity by another 2. Near 123, each single point adds about 14% to the rarity.

What your 123 could really be. If you retook a well-made test, landing at 118 or at 128 would be unremarkable. That is the difference between beating 88.5% and 96.9% of people, and short online tests are noisier still.

Which scale was it on? Most modern tests use a standard deviation of 15, which is what this page assumes. If your 123 came from a test using an SD of 16, it is about 122 on the SD 15 scale. From an SD 24 scale, used by some Cattell-style reports, it is about 114.

Retrospective estimates for historical figures rarely go this low, because they are only made for people with exceptional achievements. A few sit near 123. None of these are test scores. They are estimates from biographical evidence, and each profile explains its basis.

Rough benchmarks from our profiles that sit within a few points of 123. Degree and university figures are estimates derived from admissions-test averages, not measured IQs.

How 123 stacks up against the scores just around it and the round numbers people usually ask about. Each score links to its own page.

People with an IQ of 123 typically score about 1320 on the SAT and about 26 on the ACT composite. Scores vary a lot from person to person, so the range shows where about four in five land.