IQ 153

153 is 3.53 standard deviations above average, in the range usually called highly gifted. Only about 1 in 4,873 people score this high or higher. It sits 8 points past the 145 mark and 7 short of 160. This site labels scores from 145 as genius, but that is an informal label, not a clinical category.

Highly gifted is mostly an education term. For a child it usually signals needing more than standard enrichment, such as acceleration or specialist teaching.

A very high score is not a forecast. Eminence depends on years of work, opportunity, collaborators and luck as much as on ability.

What does a 153 feel like? Nobody can say for a specific person, but these themes come up in accounts from this range:

• Perfectionism and overthinking come up often in first-hand accounts.
• In children, reasoning can run years ahead of age while emotional and physical development stay on schedule. Educators call this asynchrony.
• None of this is guaranteed. Many people at this level feel ordinary most of the time.

Measurement gets harder the rarer a score is. A 153 is rare enough that a standard norm sample of about 2,200 people holds probably nobody at that level or above.

Ceiling effects set in when a test runs out of hard questions. Strong test-takers then bunch at the top and the score stops separating them.

Online scores this high deserve extra caution. Short tests have few very hard questions, so luck on one or two of them can decide whether you see 148 or 153.

If IQ follows the standard bell curve, 0.021% of people score 153 or higher. Here is what that share means across whole populations:

Going from 148 to 153 makes a score 3.3 times rarer, and going on to 158 multiplies the rarity by another 3.7. Near 153, each single point adds about 29% to the rarity.

What your 153 could really be. Treat any single score as the centre of a range. For a good supervised test, about 5 points either side is typical, so 153 really means somewhere from 148 to 158. Online tests are less precise than that.

Which scale was it on? A 153 reported on an SD 16 scale converts to about 150 on the usual SD 15 scale, and one from an SD 24 scale (seen in some Cattell-style results) to about 133. Check which scale your score report used.

Scientists, composers and philosophers often receive estimates in this range. These sit near 153. 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 153. Degree and university figures are estimates derived from admissions-test averages, not measured IQs.

How 153 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 153 typically score about 1600 on the SAT and about 36 on the ACT composite. Scores vary a lot from person to person, so the range shows where about four in five land.