Measure canthal tilt from a front-facing photo
Canthal tilt is the slant of the eye opening, in degrees. This page measures canthal tilt from one front-facing photo. Upload a picture you already have, or take one with the camera. The browser does the work. The photo never leaves your device.
Canthal tilt is one angle. It is not a score for the rest of the face, and it is not a remark on the person in the picture. It is a line between two corners. If you also want the wider estimate, a psl rating comes from twelve facial ratios, measured in the browser with MediaPipe: a score from 0 to 8, a band, and four category scores. There is a men's version and a women's version. You do not need an account. On the same device, the same photo gives the same score. Canthal tilt does not do that job.
Measure your canthal tilt
Tick the box above to choose a photo.
Your photo stays on your device. It is analyzed in your browser and never uploaded.
For the best result
- Face the camera straight on and keep your head level.
- Keep a neutral expression with your lips closed.
- Use even light, and keep hair and glasses off your face.
What canthal tilt is measured against
The line for canthal tilt runs from the inner corner of the eye to the outer corner. Canthal tilt compares that line with the line joining the two inner corners, not with the top edge of the photo.
If the outer corner sits higher, canthal tilt is positive. If it sits lower, canthal tilt is negative. If the two lines match, canthal tilt is 0°.
Head tilt is already subtracted. A cocked head does not, by itself, set your canthal tilt. The part removed is roll, the side-to-side tilt of the whole head. Turning left or right is a different movement, and tipping the chin up or down is a different movement. Those still change the photo, so they can still change canthal tilt.
Left canthal tilt, right canthal tilt, average
You get three figures. Left canthal tilt, right canthal tilt, and the average of the two. The band uses the average.
A small gap between the left canthal tilt and the right canthal tilt is ordinary. It can be the face. It can also be a slight turn, which the head-tilt subtraction does not remove. If that gap in canthal tilt is large and the shot was casual, take a straighter photo before you treat it as a fact.
The unit is degrees. Canthal tilt will not come back as a 0 to 8 score. Three degrees of canthal tilt is a small slant, not a 3 on another chart.
Canthal tilt bands
The band is a name for the average canthal tilt. This tool does not rank a positive canthal tilt above a neutral one, or a neutral canthal tilt above a negative one. The words are range names.
An average under 0° is negative. 0° is not in that band. A canthal tilt of -0.4° is negative. If that is the result you came for, the page on negative canthal tilt covers what the low average means, and which photo habits push canthal tilt down.
An average from 0° through 4° is neutral. Both ends belong in the band. A canthal tilt of 0° is neutral. A canthal tilt of 4° is neutral.
An average above 4° is positive. 4° is not positive. A canthal tilt of 4.1° is positive. A larger positive canthal tilt is the same measurement with a steeper upward slant. The tool does not add a compliment to it.
A photo that can hold a canthal tilt
Camera angle, expression and light all move canthal tilt. Skip the setup and a careful face gets a sloppy canthal tilt. The notes are ordinary. They matter more than a second guess at the degrees.
Face the camera. Point your nose at the lens and keep both eyes in the frame. A three-quarter pose is a poor photo for canthal tilt, because one outer corner is farther from the lens or partly hidden. Canthal tilt needs both outer corners visible.
Keep a level gaze. Look into the lens, not down your nose at it and not up from below it. Hold the phone so the lens sits about at eye height. A shot from the chest, eyes aimed down into the glass, changes the eye line, and canthal tilt follows that line.
Use a natural expression. Mouth relaxed, eyes open the way they are when you are not posing. You do not need a blank stare. You do need something close to your face at rest. A hard squint pulls the outer corner. A big smile often lifts it. Either one can move canthal tilt before any math runs.
Use even light. A window in front of you is enough. Light from one side throws a shadow through an eye corner, and the marked point can sit on the shadow instead of the lid. If you cannot see both outer corners clearly, do not read that canthal tilt. Retake it.
Step back if the camera is nearly on your nose. A very close front camera stretches the middle of the face and can nudge the corners, which nudges canthal tilt. Arm's length is a better distance.
Move hair and glasses off the corners. Turn off a beauty filter or portrait mode if it reshapes the eyes. Canthal tilt is measured on the picture you hand over. A filter is part of that picture.
What pushes canthal tilt up or down
Looking down into the lens makes canthal tilt look more negative than a level shot of the same face. So does a squint, or a frown that tightens the lower lid. A shadow on the outer corner does it too. A head turned a few degrees off the lens can drop one eye, and the average canthal tilt drops with that eye.
Chin lifted, a wide smile, or light on the outer corner and not the inner one can push canthal tilt up. Same face, different picture. If two selfies disagree, trust the canthal tilt from the photo that followed the shooting notes, not the one that feels more flattering.
Do not cock your head to level your eyes for the camera. Head tilt is already subtracted. For a stable canthal tilt, face the lens, keep a level gaze, keep a natural expression, and keep the light even.
Run the same photo again on the same device and the canthal tilt should match. The angle is calculated from the corners in that file. A different file is allowed to disagree. Canthal tilt moves when the corners move, even by a few pixels.
What canthal tilt leaves out
Canthal tilt will not tell you if you are attractive, and it will not rank you against other people. This site does not line up anyone else's face for comparison. Skin, hair, height, voice and how you treat people are outside it. A psl rating leaves those out too. That score is a geometric estimate from one photo, not a verdict on a person.
The tool does not edit the photo, and it does not generate a face. It measures corners already in the frame. A blurry, tiny, cropped or side-on photo does not have a usable canthal tilt. Shoot again.
I would not split hairs over a 1° swing in canthal tilt between two selfies. Expression and a few pixels will do that. A canthal tilt that jumps from slightly positive to sharply negative is usually the photo.
A medical worry about your eyes does not belong here. Canthal tilt on this page is a photo measurement. If something hurts, has changed suddenly, or gets in the way of seeing, ask a licensed professional.