IQ 70

An IQ of 70 is 30 points below the average of 100, or 2.00 standard deviations. This site classes it as Below Average. About 2.3% of people score at or below 70, which in a class of 30 is roughly 1 person. It sits exactly 2 standard deviations below the mean, one of the landmark points on the curve.

A score in the 70s on one online test is not a diagnosis of anything. Only a qualified professional, such as a clinical or educational psychologist, can assess anything clinical, and they never rely on a single number.

A result in the 70s often reflects the test as much as the person. Timed abstract puzzles are unfamiliar to many adults, especially anyone who left education a while ago or who learned in a different language.

If you want to understand your result, think about which questions felt hard. Running out of time, losing track of a rule and second-guessing yourself are different problems, and each one has a different fix.

A 70 from one online test is best read as a range, not a point. Even a well-built, supervised test has a margin of error of roughly 5 points either side, so the same person could reasonably score anywhere from about 65 to 75. That spans the 0.98th to the 4.8th percentile.

Your screen, your connection, background noise and interruptions all affect a timed test. A phone in a busy room is a very different test from a quiet desk.

Reading level matters as well. If the instructions or questions lean on vocabulary, anyone reading in a second language is at a disadvantage that has nothing to do with reasoning.

The same person can score 65 one week and 75 the next. Most of that swing comes from the conditions on the day rather than any change in ability:

• Sleep. A short night reliably hurts working memory and attention, the two things timed puzzles lean on hardest.
• Language. Questions that rely on words or written rules favour native speakers. Visual puzzles reduce this effect but do not remove it.
• Timing and comfort. Hunger, a headache or testing late at night can all pull a score down on the day.

If IQ follows the standard bell curve, 2.3% of people score 70 or lower. Here is what that share means across whole populations:

The curve fills up quickly towards the middle. Moving from 70 to 75 adds about 3 percentage points of people at or below you, and moving down to 65 removes about 1.

What your 70 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 70 really means somewhere from 65 to 75. Online tests are less precise than that.

Which scale was it on? A 70 reported on an SD 16 scale converts to about 72 on the usual SD 15 scale, and one from an SD 24 scale (seen in some Cattell-style results) to about 81. Check which scale your score report used.

Nobody famous has a verified IQ in most cases, and retrospective estimates are only made for a narrow group.

No historical figure on this site has an estimate close to 70. Retrospective estimates cluster between about 115 and 250 because they are only made for people with exceptional achievements. That is a selection effect, not a sign that famous or successful people cannot score 70.

70 is two standard deviations below the mean. It has historically been one of the reference lines in clinical guidance, but modern diagnosis never rests on an IQ score alone. It also requires a professional assessment of everyday functioning.

A 70 from an online test says nothing clinical on its own. If you have concerns, a GP or a qualified psychologist is the right starting point.

Nearby scores and the round-number landmarks, so you can see how quickly the percentile changes around 70. Every row links to that score's page.

People with an IQ of 70 typically score about 660 on the SAT and about 11 on the ACT composite. Scores vary a lot from person to person, so the range shows where about four in five land.