The short answer
Our free personality test asks you to rate 60 statements from Strongly disagree to Strongly agree. Each answer counts from −2 to +2; the 15 answers on each of the four scales (E/I, S/N, T/F, J/P) are added up, the sign of each total gives your letter and its size gives the strength, from 50% upward. It uses the 16-type model but is not the official MBTI, and like every personality test it is a strong indication, not a perfect measurement.
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DefinitionWhat Is MBTI, and How Is Our Test Different?
In shortMBTI, the Myers-Briggs Type Indicator, is a questionnaire that sorts people into 16 personality types using four preference scales. Our free personality test uses the same 16-type model with its own 60 statements; it is not the official MBTI.
The MBTI was developed by Katharine Cook Briggs and Isabel Briggs Myers from Carl Jung’s theory of psychological types and first published with a manual in 1962. An “MBTI type” is the four-letter result, such as INFJ or ESTP. The official questionnaire is sold by its publisher, usually through trained practitioners. Free tests, including ours, measure the same four preferences with their own questions; the ideas behind all of them are explained in our personality framework.
MBTI and Myers-Briggs are trademarks of The Myers-Briggs Company. Insight Metrics is not affiliated with it.
Step by stepHow Our Free Personality Test Works, Step by Step
In shortYou rate 60 statements from Strongly disagree to Strongly agree. Each answer counts from −2 to +2, the 15 answers on each scale are added up, the sign of the total gives the letter and its size gives the strength.
- Answer 60 statementsEach statement describes a habit or preference, for example “I like to plan things in advance rather than leave them open.” Most people finish in about 12 minutes.
- Use a five-point scaleFor each statement you choose Strongly disagree, Disagree, Neutral, Agree or Strongly agree. Behind the scenes these count as −2, −1, 0, +1 and +2.
- Mixed orderThe 60 statements take turns across the four scales (E/I, S/N, T/F, J/P), so you never answer 15 questions about the same thing in a row.
- Some statements are reversedOf the 15 statements on each scale, 8 are worded toward one letter (E, S, T or J) and 7 toward the other. Agreeing with a reversed statement counts for the other letter.
- Add up each scaleThe 15 answers on a scale add up to a score between −30 and +30. A positive score gives E, S, T or J; a negative score gives I, N, F or P.
- Turn the score into a strengthThe strength is 50 + (size of the score ÷ 30 × 50), whichever letter it points to. A score of +12 is 70% E; a score of −24 is 90% I. 50% means the scale came out even, and the bar stops at 95%.
- Read your resultYour four letters make your type, shown with the strength of each letter. The summary is free; a longer full report is optional.
The whole rule in one line
Worked example: if your 15 Extraversion/Introversion answers add up to +12, your letter is E and your strength is 50 + (12 ÷ 30 × 50) = 70%. Do the same for the other three scales and you have your type, for example ENFP with 70% E, 64% N, 58% F and 77% P.
If a scale comes out exactly even (a score of 0, which is rare), the result shows the first letter of the pair, E, S, T or J, at 50%. A letter that close to the middle is the one to check again.
See Your Own Four Scores
Answer the 60 statements and you get exactly this: four letters, each with its strength. Free to take · Free summary · Full report optional.
DesignWhy Some Statements Are Worded the Other Way Round
In shortReversed statements stop a habit of agreeing from deciding your type. If you answered Strongly agree to all 60 statements, you would score only 53% on every scale: a borderline result, not a confident one.
Some people agree with almost anything they read; others avoid the strong ends of the scale. Researchers call this a response style, and it can push a result one way without saying anything about personality. Wording 7 of the 15 statements on each scale toward the opposite letter cancels most of it out.
- 53%the strength you would get on every scale by answering Strongly agree to all 60 statements (8 × 2 − 7 × 2 = +2)
- 50%the strength you would get by answering Neutral to everything: no letter is clear
- 15statements measure each of the four scales
- 7 of 15statements on each scale are worded toward the other letter
The same idea runs through our other tests: the cognitive functions test words 2 of every 8 statements away from the function, the DISC test describes the opposite habit in 4 of every 10, and the attachment style quiz reverses 5 of the 15 statements on each dimension.
All 11 testsOur 11 Tests: Questions, Time and Where Questions Come From
In shortWe offer 11 free tests, from 24 to 120 questions each. Several use public-domain research questions (Big Five, EQ, introvert/extrovert, colour), the career test uses a US government tool, and the rest use questions our team wrote.
Where a test’s questions come from matters for how far you can trust it, so we publish the source of every one. Public-domain research questions have been studied by other scientists; our own questions are written from published definitions and are checked by our editorial team.
| Test | Questions | Minutes | What you get | Where the questions come from |
|---|---|---|---|---|
| Personality Test (16 types) | 60 | about 12 | Your four letters (E/I, S/N, T/F, J/P) and the strength of each | Our own 60 statements, 15 per scale, 7 of each 15 worded the other way round |
| Big Five Personality Test | 120 | 10–15 | 5 traits and 30 facets, compared with 320,128 US adults | The IPIP-NEO-120 (Johnson, 2014), word for word from the public-domain International Personality Item Pool; norms from Kajonius & Johnson (2019) |
| Career Test | 60 | 8–10 | Your top work-interest areas on the six RIASEC (Holland) areas | The 60 activities of the O*NET Interest Profiler Short Form by the US Department of Labor, used under CC BY-ND 4.0 |
| Enneagram Test | 85 | 12 | Your likely Enneagram type, wing and instinct | Our own 84 statements plus tie-breaker pairs, written from the classic nine-type model |
| DISC Personality Test | 44 | 6 | Your mix of the four DISC work styles | Our own 40 work-style statements and 4 work scenarios, from William Moulton Marston’s 1928 model |
| Jung Cognitive Functions Test | 64 | 8–10 | How much you lean on each of the eight functions | Our own 64 statements from Jung’s definitions, 8 per function, 2 of each 8 worded the other way round |
| Emotional Intelligence Test | 50 | 8–10 | Five EQ skills, from self-awareness to social skill | 40 statements edited from public-domain IPIP scales, plus 10 real-life situations |
| Attachment Style Quiz | 32 | 5–6 | Attachment anxiety and avoidance, and the style they point to | Our own 30 statements on the two dimensions attachment research measures; the last 2 questions are not scored |
| Introvert or Extrovert Test | 24 | 3–4 | Where you sit between introvert, ambivert and extrovert | 24 statements adapted from public-domain IPIP extraversion scales |
| Love Styles Test | 41 | 5–6 | How strongly each of 8 love styles speaks to you | Our own 41 questions; each style is rated on its own scale, with no forced choices |
| Color Personality Test | 24 | 3–4 | Your place on an eight-colour interpersonal circle | 24 statements edited from the public-domain IPIP Interpersonal Circumplex (Markey & Markey, 2009) |
Every test is free to take and gives a free summary. The full report for each test is optional.
AccuracyHow Accurate Are Personality Tests?
In shortA good personality test gives similar results when you retake it and measures what it claims to measure, but no test is perfect. Results are most trustworthy on scales where your score is clear, and least on scales near the middle.
Psychologists judge a test on two things. Reliability: do you get much the same result if you take it again? Validity: does it measure what it says, and does the score relate to real behaviour? Trait tests such as the Big Five have the strongest evidence on both, which is why our Big Five test uses a published research questionnaire and compares you with a large norm group.
Type tests are a summary of the same differences. They are easy to remember and useful for talking about how people differ, but sorting a continuous score into two letters loses information right at the middle. That is why we show the strength of every letter, and why a letter under about 60% deserves a second look.
Is the MBTI accurate?
Research on the official Myers-Briggs questionnaire finds that its four scales measure real and fairly stable personality differences: they match four of the Big Five traits. It also finds that a quarter to a half of people get at least one different letter on a retake a few weeks later, mostly on letters near the middle, and little evidence that people fall into 16 separate groups. Read a type as a good description of your preferences, not as a precise measurement.
What we have measured, and what we have not yet
- What people tell us: self-reported accuracy in our own feedback is 89%, and full reports have an average rating of 4.8 out of 5 (the figures on our About page).
- What is published: the Big Five norms (320,128 US adults) and the research behind the public-domain questions are published by their authors and listed in our sources.
- What is still to come: we have not yet published retest figures for our own 16-type test. When enough people have retaken it, we will add them to this page.
TipsHow to Get the Most Accurate Result
In shortAnswer as you usually are, go with your first instinct, avoid too many Neutral answers, take the test when you are rested, and retake any letter that came out close to 50%.
- Answer as you are, not as you want to be.Picture an ordinary week, not your best day or the person your job expects.
- Go with your first instinct.Long thinking tends to pull answers toward what sounds good.
- Use Neutral sparingly.Neutral counts as zero; too many of them make every letter look borderline.
- Take it when you are rested.Stress and tiredness change how people answer questions about energy and plans.
- Retake a borderline letter later.If a letter came out under about 60%, take the test again in a few weeks and read both type guides.
Once you have your letters, the best check is your own reading: open your type guide and ask whether it sounds like you. If two types both fit, compare them side by side, for example INFP vs INFJ or INTJ vs INTP.
What you getWhat You Get: Free Summary and Optional Full Report
In shortEvery test is free to take and shows a free summary of your result. A longer full report is optional, for people who want more detail on work, relationships and growth.
For the 16-type test, the free summary gives your four letters, the strength of each letter and a short description of your type, with a link to the full type guide. The optional full report goes deeper. Your result link keeps working so you can come back to it; for the 16-type test it works for 90 days, and our FAQ explains how to save it as a PDF.
Your dataYour Answers and Your Data
In shortWe store your answers and the details you type in so we can show and send your result. We do not sell them, and you can ask us to delete them at any time.
Before your result we ask for a few details, such as your name and email address, so we can send you the link to your result. Your answers are used to calculate your result and, without your name, to improve the tests. The full rules are in our privacy policy; to have your data deleted, write to us through the contact page.
LimitsWhat Our Tests Are Not
In shortOur tests are self-discovery tools. They are not clinical assessments, not intelligence tests, not hiring tools and not the official MBTI.
- Not a diagnosis. No result says anything about mental health. If you are struggling, please talk to a qualified professional.
- Not ability or intelligence. Preferences are not skills, and no type or trait level is better than another.
- Not for hiring or selection. Results describe preferences you report about yourself; they should not decide who gets a job or a place.
- Not the final word. One sitting is an indication. You know yourself better than any questionnaire.
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QuestionsFAQ
What is MBTI?
MBTI, the Myers-Briggs Type Indicator, is a questionnaire that sorts people into 16 personality types using four preference scales: E/I, S/N, T/F and J/P. It was built by Katharine Cook Briggs and Isabel Briggs Myers from Carl Jung’s theory.
Is your personality test the official MBTI?
No. MBTI and Myers-Briggs are trademarks of The Myers-Briggs Company, and Insight Metrics is not affiliated with it. Our free test measures the same four preferences with its own 60 statements.
How many questions are in your personality test?
The 16-type personality test has 60 statements, 15 for each of the four scales, and takes about 12 minutes. Our other tests range from 24 to 120 questions.
How is my personality type calculated?
Each answer counts from −2 (Strongly disagree) to +2 (Strongly agree), reversed for statements worded toward the other letter. The 15 answers on each scale are added up; the sign gives the letter and the size gives the strength.
What does the percentage next to each letter mean?
It shows how clear that preference is: 50% is an even split and higher numbers mean more of your answers pointed the same way. It is 50 + (size of the score ÷ 30 × 50), shown up to 95%.
How accurate is the test?
No personality test is perfectly accurate. Letters with a clear strength are usually stable; a letter near 50% can change on a retake. Self-reported accuracy in our own feedback is 89%.
Is the MBTI accurate?
Its four scales measure real personality differences that match four of the Big Five traits, but many people get a different letter on a retake, mostly near the middle, so read a type as a description, not a precise measurement.
Why did I get a different type when I retook the test?
Usually because one letter was close to 50%. Small changes in how you answer on a given day can flip a borderline letter. Read both type guides and keep the one that fits you better.
Is the personality test free?
Yes. All 11 tests are free to take and every one gives a free summary. A longer full report is optional.
Where do your test questions come from?
Four tests use public-domain research questions from the International Personality Item Pool, the career test uses the US Department of Labor’s O*NET Interest Profiler, and the rest use questions written by our own team.
Can I use your tests for hiring?
No. Our tests describe preferences people report about themselves and should not be used to select or reject job candidates.
SourcesSources
- Insight Metrics 16-type personality test: question bank and scoring rule (live version, November 2026).
- Johnson, J. A. (2014). Measuring thirty facets of the Five Factor Model with a 120-item public domain inventory: Development of the IPIP-NEO-120. Journal of Research in Personality, 51, 78–89.
- Kajonius, P. J., & Johnson, J. A. (2019). Assessing the structure of the Five Factor Model of Personality (IPIP-NEO-120) in the public domain. Europe’s Journal of Psychology, 15(2), 260–275.
- Goldberg, L. R., et al. (2006). The International Personality Item Pool and the future of public-domain personality measures. Journal of Research in Personality, 40(1), 84–96.
- U.S. Department of Labor, Employment and Training Administration. O*NET Interest Profiler Short Form (revised 2018), used under CC BY-ND 4.0.
- Markey, P. M., & Markey, C. N. (2009). A brief assessment of the interpersonal circumplex: The IPIP-IPC. Assessment, 16(4), 352–361.
- Myers, I. B., McCaulley, M. H., Quenk, N. L., & Hammer, A. L. (1998). MBTI Manual (3rd ed.). Palo Alto, CA: Consulting Psychologists Press.
- Pittenger, D. J. (2005). Cautionary comments regarding the Myers-Briggs Type Indicator. Consulting Psychology Journal: Practice and Research, 57(3), 210–221.
