IQ Scale: IQ Charts By Age

One of the main factors to take into account when looking at an IQ score is the age of the person that has taken the test. IQ scale: IQ charts by age. Different scores mean different things depending on age.

Even though there are many IQ tests available, they all use the same scale. Originally, the whole notion of IQ was arrived by the American psychologist and author Lewis Terman. Terman did not only devised the original IQ tests but also the scale used to classify all the different scores.


The IQ Scale

Although the scale for IQ scores can have slightly different names, it is always the same otherwise. Here is the original classification according to Terman:

Any IQ scores under 70 are classified as being “definite feeble-mindedness” or “low.” Scores between 70 and 79, indicate a “borderline deficiency” or “borderline low.” Those scores between 80 and 89 are indicative of “dullness” or “lower average.”

But scores between 90 and 109 indicate a “normal or average intelligence” or “higher average.” While scores between 110 and 119 are indicative of a “superior intelligence” or “above average.” Anyone scoring between 120 and 140 in their IQ test would be classified as having a “superior intelligence” or being “gifted.” The highest possible scores are those over 140, which indicates “genius or nearly genius.”

“We have seen that intellect and achievement are far from perfectly correlated.” — Lewis Terman


How are IQ Scores Distributed?

What follows is a very general estimation of the percentage of the population that fits into one of the categories that we have gone over.

Let us begin with the lowest scores. It is estimated that about 0.13% of people score low. About 2.14% of people score borderline low. 13.59% of people score below average, and 34.13% lower average.

Now let us look at the higher scores on the IQ scale. It is estimated that also about 34.13% of people have a higher average score. 13.59% of people have an above-average score. Only 2.14% of people attain a gifted score, while a tiny 0.13% of people can be classified under genius status.

People with a growth mindset believe that they can improve with effort. They outperform those with a fixed mindset, even when they have a lower IQ, because they embrace challenges, treating them as opportunities to learn something new. – Travis Bradberry

How Accurate Is The Data?

Although scores by age or nationality should always be taken with a pinch of salt it may be useful to look at them under certain circumstances.


There is no actual data organized by age, but there is some information about age groups. The following information should only be used for entertainment purposes, as it may not be totally accurate or the information may be out of date.

“If we encounter a man of rare intellect, we should ask him what books he reads.” ― Ralph Waldo Emerson

There is only data for people between the ages of 16 and 74. This is mostly because IQ tests are not recommended for younger children unless individually recommended and guided by a psychologist.

Having said all of that, here are the average scores on the IQ scale for each age group.

Average IQ For Each Age Group

It is estimated that the average score for 16 to 17-year-olds is 108, which denotes “normal or average intelligence.”

For adults between 18 and 19 years of age, the average IQ score is 105, which also denotes “normal or average intelligence.”

The average score for people between 20 and 24 years of age is 99, which also denotes “normal or average intelligence.”

For people between 24 and 34 years of age, the average score is slightly lower at 97, which still denotes “normal or average intelligence.”

The scores begin to go up again after that age, among older adults. For example, the average score for people between 35 and 44 years old is estimated to be 101, still within the “normal or average intelligence” scale.

If we don’t plant the right things, we will reap the wrong things. It goes without saying. And you don’t have to be, you know, a brilliant biochemist and you don’t have to have an IQ of 150. Just common sense tells you to be kind, ninny, fool. Be kind. – Maya Angelou

And for people between the ages of 45 and 54, the average IQ score goes up to 106 within the “normal or average intelligence” scale. But the highest average score for people under 64 is attained by those people between the ages of 55 and 64, which gets to 109 in the IQ scale, just about falling short of being classed as having a “superior intelligence” or “above average” intelligence and remaining firmly within the limits of a “normal or average intelligence” like all the other age groups.

Both age groups over 65 get a higher score. People between 65 and 69 have an average IQ score of 114, which puts them in the “superior intelligence” or “above average” end of the scale. But people between 70 and 74 who are tested for IQ get an even higher average score of 119, which puts them a mere 1 put short of getting into the “gifted” category, which means that they are still firmly within the “above average” or “superior intelligence” group together with their younger 65-69 years old counterparts.

It should not be a surprise to anyone that all age groups that have been tested always attain an average score since, as we have already seen, overall, most people who get their IQ tested get scores within that scale.

What Is the Normal Distribution of IQ Scores?

If you do not take age into account, you can look more globally at IQ scores.

For example, did you know that about 50 percent of IQ is between 90 and 110? Or that 70 percent have a score of between 85 and 115? These figures are surely illuminating. But, wait, it gets more interesting! About 95 percent of all IQ scores are between 70 and 130. And, the overwhelming majority of them (99.5 percent) do fall somewhere between 60 and 140.

Only the people who are in the highest 2 percent of the IQ scale can be admitted into Mensa, the largest and most prestigious high IQ society in the world, with members in most countries around the world.

IQ charts by age or any other criteria must be treated with the utmost care. One reason for that if that we must always ensure that we keep it scientific and that no prejudices whatsoever go into it. Also, there are many different tests available but only a small portion of people would actually take those tests. And then there is the issue of mortality that still varies considerably in different countries around the world.

Comments (170)

  1. As someone who has been professionally tested multiple times by both school personnel and psychologists, I can confirm that your IQ does not determine your intelligence. I am 15 and as of the last time I went through a psychological evaluation, which was about 3 months ago, my IQ is 145. Despite having a high IQ, I can be the most idiotic person due to the fact that most times I lack any sort of common sense. Sure I may be school smart, but I am sure as hell I’m not intelligent in any other way. IQ only shows how fast you can process and hold onto information, not smarts. And people with high IQs aren’t perfect either. I suffer from a plethora of mental disorders including psychosis, major depressive disorder, c-ptsd, autism, panic disorder, and many more. We are normal people with the same struggles and aren’t any more important than everyone else. Stay humble kids and stop taking fake IQ tests and trusting them with every cell in your body. If you want to find out, set aside the money to get professionally tested by a psychologist. And thank you for coming to my TED Talk😂

  2. Hey, I just took an IQ test and it said that I have an IQ of 134. I’m only twelve years old, and I think it’s legit because at my school I’m in the gifted class. Though of you think it’s fake tell me please.

  3. lmao everyone’s here like “im 10 and my iq is 190 am i a genus” and i’m just here wondering how i got diagnosed with high-functioning autism and got an iq score of 117 in the same day- isn’t 117 like just above average for 15?

  4. I am 11 (turning 12 February 2021) and I took a test that said my iq was 114. But then I calculated Mental age (which I don’t really know how to calculate, but I think 15) / actual age and got 136? My younger sister (just turned ten) also did the same test and got 126 for her IQ. Now I’m not even sure what my IQ is. I would like to think I’m smart, I skipped a grade after all.

  5. I had been 11 my dad took me to a place I can’t remember but it was like m.e.c.r or something but he showed me a number but all I remember him saying was you’re smarter than me

  6. Hello, I’m 16 and my IQ is 131, I’m more like the lazy smart guy, trying to find more ways to avoid physical work by just using my mind but I still wouldn’t consider myself very smart, there are of course tons of more people I know smarter than me but the thing that differentiates me from them Is just the way I think. Mt of them have a fixated mind or fixated goals while I’m just more creative, humble, confident and undecided on what path I should take in life. I’m still inferior to others in math and other classes but that doesn’t mean I’m dumb, in contrary, I’ve been given the ability to think outside the box, I like things that aren’t just straight forward like most school classes, I’m very good at geography, I like mind games, and strategy games and other games. Look people, all I’m trying to say is just don’t judge people by their IQ, is just a number, some low IQ people turn out to be better than other high IQ people. It’s about how you use your brain in life, not how you lose brain cells by judging people and bragging about how smart you are. Just accept the others as they are, maybe even help them improve but don’t tell them they are stupid. That would make you even more idiotic. And think before you speak, words could have a bit of an impact on others. Could be good or bad, I don’t know. Also respect the elders they know much more stuff than you and be more wise in most cases. Have a good day/night!

  7. I am currently 12 years old turning 13 this year (2020) later in December. I recently took several IQ tests online out of curiosity and it most of the tests said I had an IQ around the 120-130. Would this be considered above average (for my age)?

  8. The “California test of Mental Maturity” was given to me at age 8 with a result of 117 and again at age 10 with a result of 135, then one final time at age 12 with a result of 150.Is it possible that my score would increase any more over time. Please reply

      1. Bob, you do not have an IQ of 162. Achieving a score of 162 on an IQ test is near impossible. An IQ of 162 means one must have 22 points over the genius level. Bob, your brain is 1/3 of the way developed. At your age, you cannot possibly fathom having that high of an intelligence quotient. May I ask you, please spend some time off of the computer; read a book, ride your bike, learn something. Don’t tell lies for strangers on the internet to read.
        From, Anon

  9. I’m looking for new specimens and from reading all the dialog above the search is over. I’m a Zookeeper for the Los Angeles Zoo and now I know what to put into my next exhibit…..all of you!

  10. I wonder, all these people are saying they have ridiculously high IQ’s, and yet they are reading these web articles, arguing with one another in the comments, not using proper grammar and not bothering to spell simple words out completely or correct their spelling mistakes, going farther to use cuss words and abbreviations for cuss words, it makes me wonder, are these peoples IQ’s really as high as they claim they are?

  11. I am 12 yrs old, in year 8. I have an IQ score of 105. But when I saw mental disability, I never knew what would happen(confusing right). I was planning of editing in human genos and graduating in MIT. I wonder, what is the IQ score of a baby? Can u answer @amitonicole12 ?
    Good luck(wish me luck too.)

  12. 99% of the people in here claiming genius IQ are incredibly delusional to think that so many of the world’s geniuses just happen to meet under this specific article. That Facebook IQ test you took is 1000% fake. You do not have an IQ of 165, 180 or 200, those are ridiculous numbers and if they were true, I doubt you would care enough to A) brag about it and B) spend your time on web articles.

  13. IQ, doesn’t really determined or economy mean your a genius, a guess well not say or speak of a IQ or even say a think, a genius people are people who create or are rich a founding farther of a company or thing, place not a person who goes on a economic site or online, but a person who has a protential!

    1. Do any of these people leaving a reply know how to complete a sentence?
      Do any of them know how to proof read?
      There was not one comment that made sense!
      Example: Im a jeanious cus I had iQ of 291 on my finder of a beesnous.

  14. People say I learn fast and the doctor says I’m intelligent because I have double teeth it providence by economic science I really don’t know like does actually mean that or is just providence teeth like I don’t know

  15. I’m 13 I’m a hacker I guesspass people password and some how I always get it right I’m a Developer, I’m a scripter programmar modeler 3D builder. I also lockpick people door for fun! People say my IQ is about 180 to 200!

  16. Amazing, so many geniuses. Well, if you are able to comprehend metaphors, parables, lyrics, hidden patterns etc, you are clever. That is not wise though. If one of your friends come across as weird, he probably see more, is more clever. If you say to someone ‘wtf u talkin’ about?’, he probably sees you as little slow. If you know a quiet guy, he sees you perhaps as a little child, yet to catch up…why waste words and energy on small talk. If you think of others often in terms ‘cant you see?’…you don’t need a iq test, you are smart… you were born like that so stop bragging, the hard job is to be wise, and wise people don’t brag

    1. What you said about wise people not bragging is true but what you said about people just being automatically smart (with superior intelligence) is untrue, you may have a slightly higher IQ than some others at a young age but other than that you have to exercise your brain keep it sharp to earn yourself a higher than average IQ.

  17. Iq is a number, iq is for losers. Iq: imagenary. The better imagenation you have, the more intelligent you are. No need tests.

  18. I’m quite young per say, I’m still a child. The comments I see here, majority of people here are quite older than I expected. I took the IQ test, and I’ve reach 130.

  19. Wow I am bored so I read through all your post I call bullshit for half of you it tells you where your IQ should be so I know half of you are liars . I’m 41 and I scored a 102 it’s not what you k ow it’s what you have been through In life and what you learn from life’s challenges so , all you youngsters get a hold of yourselves because your only as good as you believe yourselves to be. There are so many of you that can’t even spell even when there’s spell check so don’t flatter yourselves just believe in yourselves and you can accomplish ANYTHING

    1. Well, I got 143 iq and i’m 9 although my friend is 10 and he got 158 but we were on an adult iq test so not to brag but we’re genius level

    2. Yours looks like one of the very few honest comments on here. There is a massive disparity between different tests and I think some people may be comparing apples to car wheels. Even taking that into consideration some people on here have declared themselves the world’s most intelligent people. You can only ever take one accurate I.Q. test in your life, after that it’s also measuring the understanding gained from doing previous tests. People keep repeating a test to get a higher score is a possibility but these scores are corrupted.

      I’m now left with the quandary do I post my score of 502 or not? 😉

    3. Actually, the article includes the average IQ’s for people of those age groups and the average modern day person of those ages is not very intelligent. Besides most of these people talking in the comments are some where in the age group 9-16 and the article does not say the average IQ for someone younger than 16. Given what I just explained to you how in the world did you deduce that half of these people are liars? I encourage you to try and give me an answer. 🙂

  20. I scored in the ‘exceptional’ category when I sat a navy reasoning test. I don’t know the exact name of the I.Q test – they just went wide-eyed & said I scored exceptional. I tried so hard that afterwards I was so mentally taxed that I was almost talking jibberish when I tried making small talk.

    1. Ok, your not 4 months and spelling, using a electronic, and you most defiantly don’t have a IQ of 200 if you think people actually believe that

  21. Everyone here who says they got over 150 and then says “is that good?” you would know if you didn’t know it was good you have below average intelligence.

  22. I am not sure what my iq is. A lot of these people ( probably 80 percent) are lying.
    I feel like the people who are putting the time in to write those long articles are writing stories that some of them I fell like are telling lessons. I did take an iq test once. It was 104-120. I had help. I am only a kid, so my iq is at least 10 points lower than 104. I really can tell though some of these people are being TROLLED by there iq test. Some of them are not really lying they have just had a bad iq test. If you really feel like your score, let’s say… 167 is just most likely wrong, then you may have just done a bad iq test. I really can not say though. I am not you, you are you. You obviously make your own decisions so you know to believe or not believe, and you also know that you should NOT lie, but some of you just… do! You should not.

    1. I’d say 95% are lying I completely agree with you, its a bell curve think about this reasonably, unless you are in that top 2 percent, not everyone is going to have a very high IQ. I didn’t look at all the responses, but I only saw 3-4 people who said they had normal intelligence, when there should only be a couple people here with a very high intelligence, and they are most likely not posting about it, moral of the story, don’t take whatever IQ tests you find online, they give you a feeling of superiority, and not your intelligence.

      1. Only a small majority of first world countries have been tested, so the bell curve might not be accurate according to the real population, but more realistic relating to the population that have taken the test

      1. i took 2 different tests on different websites, on the first i got 111, on the second i got 141 so im confused on which to believe. because i dont believe my brain can have an iq over 100.

      2. I’m 16 and I got 117. All these little kids lying about their iq is soooo funny.

  23. Why are people posting fake iq score in these comments? The chances that all the people who read this article are classified as at least “superior intelligence” is very, very low. Just a thought.

    1. I am just on here because this below average kid said I have a 0 IQ and well I wanted to show him I actually am above average for a 12 year old.

  24. I just turned 17 years old today and my IQ is 160+ according to the test I attempted on Stanford–Binet Intelligence Scales.

      1. I’m 13 and I took 5 separate IQ Tests, and got a mean IQ Score of 133.8 so I think I have a good chance of whatever comes to me in the future.

    1. “I’m ten and I scored 120+, is that good?” is getting so annoying. Listen here, the majority of people don’t have that much IQ, and it didn’t happen. As a 9 year old with an IQ of 115, people here have an IQ of, lets say 80. 95% of people are lying, don’t get jealous.

  25. I don’t know if I should write anything here I took the test and I only got a 58 in intelligent quotient test I am a 33-year-old man and I feel I am very stupid about me most of the time, I don’t have many friends ppl who know me think I am average, is there any medicine to improve my IQ. Since English is not my mother tongue you could spot a lot of mistakes kindly pardon my ignorance.

    1. Abe you sound more intelligent than Jacob, who said he scored 152. I wouldn’t worry about it. You said english is your second language, you even write better than many native english speakers

    1. Well if you are qualified for Mensa it is a good score. I am 13 years old and i took the test simillar to Mensa’s test and i got 152.

  26. I was in late 40’s when I was encouraged by my collage age daughter go with her to collage. Taking the placement test was difficult since I was not smart, with only a GED. I had difficulty in school from the begining and it only worsened when I failed the 6th grade. I started 7th, but only went a few months. In my early 20’s I was accepted into a program to get my GED. My teachers encouraged me to take the GED after only two months. I knew I would fail they convinced me it was only to assist them by finding the weakest areas. I passed with above average scores. Back then it was difficult. I was shocked thinking it was just a fluke. The placement testing for collage placed me in entry level classes. Again I was shocked. But, they said my scores were rather different and wanted me to assessed by DRS. They had me tested by a psychiatrist. That was two days of testing. I was told I had ADD with dyslexia. My IQ 130, this did not come from one standardized test, but a battery of three IQ and evaluation of all subjects, thinking skills, problem solving and other abilities. I did Graduate Magna cum Laude. Once I discovered I was an intelligent person I flourished. It was not until the psychiatrist asked me what grade I complected that I had to tell anyone the 6th grade. Latter I was asked to speak to teachers about my education difficulties along with what many called amazing achievements. It was not until that day that I truly understood I was incredibly gifted.

    1. So true , you are what you tell yourself are . also you are what other people think you are , there’s no changing that . but anyways ,the book quote make’s the most sense to me , your only as smart as what fact’s you been exposed too. good story Dee

      1. I am 62 now, when I was 16 in 1974 I took an IQ test from a psychologist. The score was 140 which is border line genius. However for many years my self-respect or self-esteem was generally pretty low. So it took until I was 55 to. fully began to use what I was given at Birth. I now have a better and more meaningful life than I did when I was in my 30s and 40s. For I had to strive and apply myself over all my years at least at a step at a time. I no longer wish that I would not be at such a higher IQ .

  27. holy. shit.
    im not kidding. i just took an iq test and im 13 years old.
    i got 230.
    thats higher than albert einstein but i dont feel smart. wtf im so confused.
    230 is really high especially for my age.
    i might not be pushing myself high enough if im that smart but im not in college yet.
    although, come to think of it, i have been reading at college levels since i was in 2nd grade.

    1. Your score sounds realistic I guess, when I was 3/4 I had had a 8th grade and higher spelling and reading level, I have no idea what my IQ is as I have never taken and IQ test, but I have score higher than state average on all my SBA (Smarter Balanced Assessment) tests since they started 3 grade, I am now 6th grade.

  28. I’m 59 and scored 132. I fell into the wrong crowd at 15 and stopping smoking pot/alcohol then quit in 11th grade. So I’ve wondered how my life would have turned out. School was always easy til then but I lost interest in so many things. I finally wised at 39. I amazed myself at how much I accomplished in monetary but most important on being a productive member of society by adding to it.

  29. Wisdom cannot be scored. I don’t have a college degree but I have a masters in street smarts. You’ll always survive if you know how to navigate through the concrete jungle.

    1. You comment had me rolling on the floor.
      You are absolutely right and I quote ” WISDOM CANNOT BE SCORED”
      wisdom comes naturally from the combination of the genes of our two biological parents.
      So yes I agreed with you.

    2. So true. It doesn’t really mater if you are skilled in academics if you are not street smart, there have been plenty of people who were incredibly intelligent but were unsuccessful because they were not street smart.

  30. Hello I took a recent I.Q test and I was shocked at how high my I.Q was concidering I never graduated from high school but managed to get a 118 on my test…

  31. As a 9or10 y/o I got a 115. But as a 15 y/o I got a 160. I was wondering if this is a good improvement and how much higher of an IQ do I have compared to other people in my age group.

      1. I hate to say that most Iq tests are unreliable, so you might want to take an “approved” version. I hope your iq is as high as you say it is, that would be a tremendous gift!

  32. High IQ doesn’t always correlate with higher functioning, as a young person I found myself quickly disinterested in the pace of my education. I was terribly curious of many things, I found reading encyclopedias and dictionaries to be more rewarding than textbooks. In the 1960’s I don’t believe schools were very adept at guiding gifted children so they were left to figure things out on their own. When I was finally tested in 7th grade in a general altitude test I was flagged to receive further testing. The results were never shared with me, a record of the testing was sent to my parents, in fact I wouldn’t have even known what the test was about if my English teacher hadn’t made an off hand comment to be about how fortunate I was to have the skills I did, it was a meaningless comment as I had no reference for how to interpret his statement.

    53 years later after both my parents passed away and their estate was distributed, my youngest sister whom handled the belongings sent me a few boxes of my fathers documents. As I sorted through the papers I came across a file with all my school records, there in my 7th grade folder were the results of my IQ test, I was momentarily stunned when I saw the number, it didn’t seem possible nor real, it was 178 points. As I considered that and the implications I literally heard my fathers voice in my head saying one of his favorite warnings, “ there are plenty of really smart people pushing shopping carts down the road” it isn’t how smart you are, it’s how you use your smarts.

    It’s been a long and interesting life for me, I think the one thing my brain did was give me the ability to know how to stay alive in a world that isn’t that kind.

    1. What a wonderful story. I believe that emotional intelligence should be integrated with standard IQ tests to encompass multiple facets of a person as a whole. My IQ is 155 which makes me just smart enough to realize how much I don’t know.

    2. I’m not convinced that there even is a thing that should be called “IQ.” Why? You could be a genius, yet have severe psychiatric problems that make you seem unintelligent. But these psychiatric problems can be controlled by medications, so at this time your IQ would shine through. Or, you could have a very, very low IQ score, but if you’re naturally an extremely happy, friendly person, your answers to questions might be more intelligent than people who supposedly have “higher” IQ scores. In addition, a lack of energy might make a person who has a very high level of intelligence appear lethargic and naive, so they might do poorly on IQ tests. A person with a naturally intense personality might act more intelligent than someone with a high IQ and a laid-back personality. The bottom line, in my opinion, is that IQ tests mean nothing. Much more important is your ability to adjust to the daily changes that life brings.

  33. I took an IQ test when I was in grade school and they wouldn’t tell me what my score was.
    LOL. Even then I thought the test was unfair at that time in my life. I recently took another test and scored 110, which I agreed with. I am now 77.

      1. Iq does not go down, just the effective nature of your knowledge from the generational information degraded. It’s of note in most cases the only part of why your IQ may go down is because it does not account for the fact you move slower and you think slower not that your truely less capable. Iq tests tended to be timed, so if a tested could be made that does not require a time segment as part of the scoring methodology. You would thus mostly see no decay.

      2. I’m 9 i have taken a iq test when i was eight my iq was 150 i’m qustion is that score good

    1. You could’ve scored a 260 Janice, it still wouldn’t prevent you from age related dementia. Either your prone to losing your mind later in life, or you’re not. I hope you’re not!

  34. Well I tried the test in the early hours as I could not sleep and at 73 years of age and still working I scored 117 so I am pretty happy with that
    I have to say can’t believe I spent that much to find out my score.
    I guess you guys have a high score in mental persuasion well done you made my day

  35. I was always under the impression that people got intellectually slower as they got older even though their store of actual knowledge may have gotten greater. I was glad to learn that this is apparently not the case. Do you think that less intelligent people tend to die earlier, making the average i.q. of survivors grow higher as age increases? Or is there something living in the old days that made the older people smarter than the young? Are there other possible reasons? I’d be curious to know why this pattern occurs.

    1. I would guess that it’s caused by older people having more experience, making it easier to answer the questions on an IQ test. For example, a 70 year old has been exposed to far more sequences of numbers than a 15 year old, making it easier for them to answer that particular type of question.



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