Take the test
Side by side

Bigender vs Trigender

Same shape, different arithmetic: bigender is two whole genders and trigender is three.

The short version

Bigender means you have two genders. Not half of each — two whole ones, both of them you. Trigender means three. Not one gender in three outfits, not two and a maybe — three, counted honestly, more than once. That is the entire difference, and both pages are blunt that it is a count, not a style.

Everything else runs in parallel. Both can arrive one at a time or stacked. Neither requires the genders to be man and woman, and neither requires equal shares: one can run the show eleven months of the year and the others stay real. One frequently has no name. The test is unglamorous. Describe yourself as two. If nothing is left standing in the corner, bigender is the better word and the simpler life. If something refuses to fold in, you have your answer.

How to tell them apart

Count the wardrobe. Two halves, kept for a reason that is not fashion: bigender. Three shelves, and you could point at which belongs to which: trigender.
Sort your old photos. Bigender people find two piles, two people, both them. Trigender people find three, and know which pile is which without thinking.
Try bigender on for a month. If it accounts for two of you and leaves one standing in the corner, it is three.

Which one is more likely

More likely Bigender if…

  • There are two places, and you are in one of them, fully.
  • When you picture yourself in ten years there are two versions, and losing either reads as a bereavement — and there are exactly two.
  • The count has come out two every time you have checked, in every mood.

More likely Trigender if…

  • You have tried bigender and it accounts for two of you and leaves one in the corner.
  • You keep counting, over years, and it keeps coming out three.
  • One of the three has no name, and explaining it means listing what it is not.
When both words fit
  • Rarely both. The count is the whole distinction, and a person who honestly counts three is not also two. Some people say bigender, or just non-binary, in public because it is easier, and trigender in private.
  • The count moved. Two for years, then a third arrived and stayed. If that is you, the word changed because the count did, and the earlier word was not a lie.

Five questions to tell them apart

The compare tool asks the five statements that separate Bigender from Trigender most, and scores them on your device.

Try the five questions

What people get wrong

“Trigender means man, woman and both.”
Sometimes. Often not. The third is frequently not a blend of the first two — it is a separate thing, and usually the hardest to put into words. And bigender does not have to mean man and woman either.
“Two or three genders means two or three personalities.”
No. Gender is not personality and not a separate self with its own memories. You are one person the whole time, with the same history and the same bad jokes. Plural systems are a different thing entirely, though a person can be both.

Questions people ask

What is the difference between bigender and trigender?

The number. Bigender is two genders, trigender is three. Both can be held at once or moved between, both can include genders with no name, and neither needs to be split evenly. If you keep finding a third that will not fold into the other two, trigender or multigender fits better.

Can you be bigender or trigender and also genderfluid?

Yes, either. Fluid is about movement; bigender and trigender are about count. A person who moves between exactly the same two, or the same three, is both words at once — people say “trigender fluid” for the second. If the count itself keeps changing, look at multigender or genderfluid instead.

Read both in full

Bigender

Two genders. Not half of each — two whole ones, both of them you.

Trigender

Three genders. Not one gender in three outfits, not two and a maybe — you have counted honestly, more than once, and it keeps coming out three.

More comparisons

Agender vs BigenderBigender vs AmbigenderBigender vs GenderfluidTrigender vs PolygenderBigender vs Non-BinaryMultigender vs Bigender

Not sure which is yours?

Twenty questions across six dimensions, about four minutes, then a ranked shortlist rather than a verdict. Scoring runs on your device; nothing you answer leaves it.

Take the test
MyGender

Last updated · How these pages are written and checked

Written from the two identity pages on this site, which are written from how people who use each word describe it.

This compares two descriptions, not two people. It is not a clinical instrument, not a diagnosis, and not evidence of anything about anyone.