Face Symmetry Test
Measure how closely the left of your face matches the right. Six landmark pairs are compared against your facial midline, and you see the result as a percentage with each pair's contribution.
- No signup
- No upload
- Free
- ~10 seconds
Click to choose a photo, or drop one here
Straight-on, even lighting, at arm's length gives the most comparable reading.
No photo to hand? Try one of these and see what the tool returns.
Runs in your browser. Your photo is never uploaded.
How is facial symmetry measured?
By comparing the distance of matched landmark pairs from the facial midline — the line running from the top of the forehead to the bottom of the chin. Six pairs are used: eye corners, brows, cheekbones, nostrils, mouth corners and jaw angles. The result is the average agreement between sides, as a percentage.
- No face is perfectly symmetrical; small left-right differences are universal.
- Head rotation of even a few degrees compresses one side and lowers the measured score.
- Symmetry carries the largest single weight in this site's composite score, at 40%.
How this facial symmetry test measures your face
A midline is drawn from the top of your forehead to the point of your chin. Six pairs of landmarks — outer eye corners, inner eye corners, brow peaks, nostril edges, mouth corners and cheekbones — are then measured for their perpendicular distance to that line.
For each pair, the difference between left and right is divided by their average. Small differences barely register; a pair that sits noticeably further out on one side moves the number. The final percentage is what remains after all six deviations are subtracted.
Is my face symmetrical? What the percentage means
Nobody scores 100. Perfect bilateral symmetry does not occur in humans — jaw development, sleeping position, chewing side preference and simple growth variation all introduce differences, and a face measuring in the low nineties is already unusually balanced.
Most faces land between 85 and 95. Below 80 usually means one specific pair is far out rather than a general imbalance, which is why the breakdown matters more than the total.
Check facial symmetry — why your result changes between photos
Head rotation is the biggest source of variation. A few degrees of yaw shortens one side of the face in the image and lengthens the other, and the test measures the image, not the skull.
If you want a comparable reading, face the camera squarely, keep the phone at eye level and at arm's length, and use even light. A selfie taken from below and to one side can easily read ten points lower than the same face shot straight on.
Do face symmetry exercises actually work?
For most asymmetry, no. The differences the test picks up are usually skeletal — one side of the jaw grew slightly differently, one orbital sits marginally higher — and muscle exercises do not move bone.
There are exceptions worth knowing about. Asymmetry that came on suddenly, or that involves one side of the face moving differently rather than sitting differently, is a medical question rather than a cosmetic one and belongs with a doctor rather than a face app.
An asymmetrical face is the normal case
Symmetry has a real but small relationship with rated attractiveness in published work — smaller than skin quality, and smaller than most people assume from how often it is discussed.
The practical read: a face at 88 per cent and a face at 93 per cent are not visibly different to anyone who is not measuring. What you notice in the mirror is usually one specific feature, and the breakdown will tell you which one it is.
What causes facial asymmetry in the first place
Some of it is developmental: the two halves of the face grow semi-independently and never finish identically. Some is functional — chewing predominantly on one side, sleeping on one side, and habitual expressions all leave small asymmetries. Some is dental, since the bite sets the position of the lower face. And some is simply that paired structures in the body are rarely identical.
None of this is unusual, and the size of it is smaller than people expect once it is measured rather than looked at. The reason it feels significant is that you notice your own asymmetry after seeing an unflipped photograph of yourself, and you have spent your life looking at the flipped version in a mirror.
When facial asymmetry is worth mentioning to a doctor
Asymmetry you have always had is anatomy. Asymmetry that has appeared or increased is a different question. A new droop on one side of the face, a change in how one eye closes, or asymmetry that comes with weakness, numbness or difficulty speaking is a reason to seek medical attention rather than to run a test — a sudden one-sided facial droop is a stroke symptom and is treated as an emergency.
Slower changes matter too. An asymmetry that has developed over months, or one accompanied by jaw pain or a change in bite, is worth raising with a clinician or dentist. This site measures a photograph; it does not know what your face looked like last year, and that comparison is the one that carries the information.
Tips for an accurate symmetry reading
- Head rotation is the single biggest source of error. A few degrees of yaw shortens one side of the face in the image.
- Keep the camera at eye level. Tilting up or down rotates the midline relative to the features.
- Even light on both sides — a shadow on one cheek moves that cheekbone landmark.
- Neutral expression. Almost everyone smiles asymmetrically, and the test will faithfully report it.
Face Symmetry Test — frequently asked questions
What percentage counts as symmetrical?
Nobody scores 100 and the normal range is narrower than people assume. The useful reading is not the headline percentage but which landmark pair is furthest apart, since that is the part you could actually point at.
Does hair affect the symmetry score?
It can, by covering one side more than the other and interfering with the outline landmarks. Pulling hair back gives a cleaner read, which is the same advice as for face shape.
Is this face symmetry test free?
Yes, with no account. The percentage and every landmark pair behind it are free.
What is a good facial symmetry score?
Most faces land between 85 and 95 per cent. Nobody reaches 100 — perfect bilateral symmetry does not occur in humans.
Why is my face symmetry score different each time?
Head rotation. A few degrees of turn changes the measured distances on both sides. Face the camera squarely for a comparable reading.
Can face symmetry exercises fix asymmetry?
Rarely. Most asymmetry is skeletal and muscle exercise does not move bone. Sudden asymmetry, or asymmetry in movement rather than position, should be seen by a doctor.
Does an asymmetrical face look worse?
Symmetry correlates with rated attractiveness, but weakly — less than skin quality does. The difference between a typical and a highly symmetrical face is not visible without measuring.
References
- 1.Grammer, K., & Thornhill, R. (1994). Human (Homo sapiens) facial attractiveness and sexual selection: the role of symmetry and averageness. Journal of Comparative Psychology, 108(3), 233–242.
- 2.Rhodes, G. (2006). The evolutionary psychology of facial beauty. Annual Review of Psychology, 57, 199–226.