What a face symmetry test measures
A face symmetry test compares the left half of your face with the right half. This one does it with six pairs of matching points, and tells you how far apart each pair is in a way that does not depend on how big your face is in the photo.
The result is a symmetry score from 0 to 100, plus a table showing the difference for each feature pair. A higher score means the left and right points sit at more equal distances from the centre of your face. It is one of three parts of the full attractiveness test, where it counts for 40% of the total. When your head is turned by more than 5 degrees it is left out, and the total uses proportions and jawline only.
How the symmetry score is worked out
- The face model marks points on your face. The centre line runs from the top of your forehead to the tip of your chin.
- For each of six pairs (outer eye corners, inner eye corners, mouth corners, eyebrows, cheekbone edges and jaw points) the test measures how far the left point and the right point sit from the centre line.
- The difference between the two distances is taken for each pair, averaged across the six pairs, and divided by your face width.
- That share is turned into a score. A difference of zero gives 100, and the score falls as the difference grows.
Because the distance is measured to the centre line, not to the edge of the photo, tilting your head a little does not change the result. Turning your head does, and that is why a symmetry score is only given when your head is turned by no more than 5 degrees.
| Feature pair | What a difference looks like |
|---|---|
| Outer eye corners | One eye set wider or narrower from the centre than the other |
| Inner eye corners | The gap on one side of the nose bridge is larger |
| Mouth corners | One side of the mouth sits farther out, often from a slight smile |
| Eyebrows | One brow sits farther out or is raised |
| Cheekbone edges | One side of the face looks wider, often from head turn |
| Jaw points | One side of the jaw sits farther from the centre |
How to take a photo for a fair symmetry reading
- Look straight into the lens with your nose in line with the centre of the camera. If your head is turned by more than 5 degrees, this page shows no symmetry score and asks you to retake the photo, because a turned head would be mistaken for an uneven face.
- Keep the camera at eye level and a little farther away than a normal selfie. Close, low or high angles distort one side more than the other.
- Light your face evenly. Light from only one side puts a shadow on the other, which can move the points.
- Use a neutral expression. A one-sided smile or a raised brow shows up directly as asymmetry.
- Move hair off the face so the brows, cheeks and jaw are visible.
What a symmetry score does and does not mean
Symmetry is one thing you can measure. It is not the same as attractiveness, and this tool does not claim that it is.
- It measures one photo. Expression, tilt, light and lens all change the result, so two photos of the same face can differ by several points.
- Small differences are normal. Real faces are never mirror images, and the model that places the points can itself be a few pixels off.
- It does not judge you. A geometric measurement is not a medical, psychological or beauty assessment. See the disclaimer.
Looking at another view of the same photo? The golden ratio face calculator measures proportions instead of left-right balance, and the attractiveness test combines both with the jawline.
Face symmetry test FAQ
Is a perfectly symmetrical face normal?
No. Almost every face has small left-right differences in the eyes, brows, mouth and jaw. A very low difference in a photo is more often a sign of a straight-on photo than of a rare face.
Why does my face look less symmetrical when I turn my head?
Turning the head makes the near side of the face look wider than the far side, and the face model also places the points unevenly. The test cannot tell this from a real difference, so when your head is turned by more than 5 degrees it gives no symmetry score and asks for a straight-on photo.
Does a mirrored selfie change my result?
A mirror image has the same left-right differences, flipped. The measurement of how far each side sits from the centre line is the same, so a mirrored photo gives essentially the same symmetry result.
Does a low symmetry score mean something is wrong with my face?
No. It means that in this photo the points on one side sit a little farther from the centre line than on the other. Lighting, tilt, expression and habits such as a slight smile on one side all affect it.
Is my photo uploaded for the symmetry test?
No. The face model runs in your browser, the photo stays in memory in your tab, and nothing about the photo or the facial points is sent to a server or to analytics.