The 16 Personality Types
The 16 personality types are four-letter codes, like INFP or ESTJ, that sum up four personality trait scores. On this site every letter comes from one of your Big Five scores, so a code is a short summary of real scores.
Updated
How do the four letters work?
Each letter pair splits one trait at the middle of its 0 to 100 scale. A score of 50 or more gets the first letter. The fifth letter, added after a dash, comes from a fifth trait: how strongly you feel stress.
| Letters | Comes from | 50 or more | Under 50 |
|---|---|---|---|
| E / I | Extraversion | E, outgoing: gets energy from people | I, reserved: gets energy from quiet |
| N / S | Openness | N, imaginative: loves ideas and new things | S, practical: trusts the concrete and proven |
| F / T | Agreeableness | F, warm: puts kindness and harmony first | T, frank: direct, questioning, competitive |
| J / P | Conscientiousness | J, planner: organized and goal-driven | P, improviser: flexible and spontaneous |
| -T / -A | Neuroticism | -T, tuned-in: feels stress strongly | -A, anchored: stays calm under pressure |
The letter names will look familiar if you have seen four-letter types before. Here they mean exactly what the table says, and our How it works page shows the full rules.
What are the 16 types, group by group?
We group the types by their middle two letters, which come from Openness and Agreeableness. Those two traits shape a lot about what people notice (ideas or practical facts) and how they deal with others (warmly or frankly). The groups are only a way to browse.
Curious and candid
N and TImaginative and frank. They love ideas, question everything and say what they think.
Curious and caring
N and FImaginative and warm. They care about people, meaning and making things better.
Grounded and candid
S and TPractical and frank. They value facts, results and straight talk.
Grounded and caring
S and FPractical and warm. They look after people in real, everyday ways.
A short guide to personality types
Are types boxes?
A type code cuts each trait at the middle. That is handy, because four letters are easy to remember and talk about. It also hides detail. Someone who scores 51 on Extraversion gets the same E as someone who scores 95. That is why your results always show your five scores next to your code. If one of your scores lands close to 50, read the profile for the type you would have been with that letter flipped as well.
Why might my code here differ from another test?
Every test uses its own questions and its own rules, so the same person can get different codes on different sites. Our codes come from public, well-studied Big Five questions, and we explain how every letter is chosen. If you have taken another test before, don’t be surprised by a different letter, especially where your score sits near the middle.
What are types good for?
- Self-reflection. Noticing patterns in how you work, rest, learn and relate to people.
- Better conversations. A shared, friendly language for differences with friends, partners, classmates or teammates.
- Ideas to try. Study methods and career directions that fit your style, as starting points rather than rules.
What are types not good for?
Hiring, judging people or deciding what someone can achieve. No personality test can tell you that, and this one does not try. It is a tool for self-reflection, not a diagnosis.
Questions about the 16 types
What are the 16 personality types?
They are 16 four-letter codes made from four pairs of letters: E or I, N or S, F or T, and J or P. On this site each pair comes from one Big Five trait score, so your code is a short summary of how you scored on Extraversion, Openness, Agreeableness and Conscientiousness.
Which personality type is the rarest?
We don’t publish type counts, because we never see anyone’s results: they stay on each visitor’s device. On this test the line for each letter is the middle of the answer scale, and many people agree with warm and curious statements, so codes with F and N tend to come up more often than codes with T and S.
Can your personality type change?
Your scores can shift over time, and a letter can flip if a score sits close to 50. Research on the Big Five finds that adult traits are fairly stable but still change slowly across life. Many people become a little calmer and more organized as they get older. Your mood on the day can also nudge a close score.
What is the difference between a type and a trait?
A trait is a score on a scale, like 72 out of 100 for Openness. A type sorts people into groups by cutting each scale in the middle. Traits keep more detail, and types are easier to remember and talk about. Your results show you both.
Is one type better than another?
No. Every type has strengths and blind spots, and every mix of scores can lead to good work, good friendships and a good life. The point of a type is understanding, not ranking.
Are these the same types as other personality tests?
They use the familiar four-letter format, but here every letter is defined by a Big Five score, and this site is not connected with any other test or publisher. Our nicknames, descriptions and advice are our own, so a code here may not match a code you got somewhere else.
Which one are you?
Take the quick test in about five minutes, or the full test in about fifteen. Your full results are free.