Face Symmetry Test

Find out how symmetric your face is with a 0–100 score from 12 mirrored landmark pairs, corrected for head tilt.

Free no signup478 landmarksOn-device no upload~3 s to result

Live scan demo0 / 478 points

Front-facing · neutral expression · even light

Add a selfie to begin

Method

How it works and the exact formula

Facial symmetry is the degree to which the left half of your face mirrors the right half. Perfect symmetry does not exist in real faces: bone growth, chewing side preference, sleeping position, dental history and even which eye you squint with in sunlight all leave small, measurable differences. What researchers and clinicians compare is how large those differences are relative to the size of the face, and that is exactly what this test reports.

When you add a photo, Google's MediaPipe Face Landmarker runs inside your browser through WebAssembly and places 478 three-dimensional landmarks on your face. We convert those normalized coordinates into true pixel space so that the aspect ratio of your photo cannot distort the result, then rotate every point around the brow center until the line through your two iris centers is perfectly horizontal. This roll correction matters: a head tilt of only three degrees moves the outer eye corner on one side up and the other down, which would otherwise read as asymmetry.

Next we construct a facial midline through the glabella (landmark 168, between the brows) and the subnasale (landmark 2, where the nose meets the upper lip). For each of 12 bilateral landmark pairs (outer and inner eye corners, upper and lower eyelids, inner and outer brow points, forehead edges, cheekbones, jaw corners, chin edges, nostril wings and mouth corners) we measure how far each point sits from the midline horizontally and how far along the midline it sits vertically. If your face were perfectly mirrored, both sides of every pair would have identical distances.

The differences are divided by half of your cheekbone width, so a large face photographed close up and a small face photographed from far away produce the same score. The average normalized discrepancy D across all 12 pairs is then mapped onto a 0–100 scale with an exponential curve. A face with no measurable difference scores 100; each additional percent of discrepancy lowers the score smoothly rather than in steps, which keeps the result stable when you scan two similar photos.

Formulas

Roll correction: θ = atan2(y473 − y468, x473 − x468); rotate all points by −θ around L168
Per-pair discrepancy: d = (| |L·n| − |R·n| | + | L·u − R·u |) ÷ (½ · |L234 − L454|)
Mean discrepancy: D = Σ d ÷ 12
Symmetry score: score = round(100 · e^(−3.2 · D))

MediaPipe landmarks used

Anatomical point	Index	Role
Iris centers	468 / 473	Define the interpupillary line used to level the whole face before any ratio is computed.
Glabella	168	Top anchor of the facial midline.
Subnasale	2	Bottom anchor of the facial midline.
Outer / inner canthus	33 ↔ 263, 133 ↔ 362	Eye-corner pairs: the most sensitive symmetry signal in most faces.
Upper / lower eyelid	159 ↔ 386, 145 ↔ 374	Capture eyelid height differences (one eye looking smaller).
Brow points	70 ↔ 300, 105 ↔ 334	Capture brow height asymmetry, often expression-driven.
Forehead / zygion	103 ↔ 332, 234 ↔ 454	Upper-face width balance; zygion also sets the normalization width.
Gonion / chin edge	58 ↔ 288, 172 ↔ 397	Lower-face balance: jaw corner and chin deviation.
Alare / cheilion	102 ↔ 331, 61 ↔ 291	Nostril wing and mouth corner position.

Benchmarks

Symmetry score bands and how the scanner ranks them

Symmetry score bands and how the scanner ranks them
Metric	Band	Value range	Tool score	Modelled percentile
Symmetry	Highly mirrored	94 – 100	94–100	97th–99th
Symmetry	Strong	88 – 93	88–93	94th–97th
Symmetry	Typical	80 – 87	80–87	87th–93rd
Symmetry	Noticeable asymmetry	70 – 79	70–79	71st–85th
Symmetry	Check pose / lens	50 – 69	50–69	29th–69th

Most front-facing, evenly lit photos land between 80 and 93. Scores under 70 are usually caused by a turned head, a wide-angle lens held close, or an asymmetric expression rather than bone structure. Percentiles are modelled from the reference distribution our scorer uses (scores are mapped through a normal curve, mean 60, SD 18), not from a database of user faces. We don't build one: selfies are deleted within 2 hours and free scan results after 48 hours.

Styling

Styling and virtual try-on by result

Symmetry is one of the few facial measurements that styling can visibly shift. Hair partings, brows, frames and necklines all create lines that the eye uses as reference points, so the right choices make small natural asymmetries recede.

Score 90+

Your face is well mirrored, so symmetric styles work for you: a precise middle part, centered fringes, round or panto frames and a crew or square neckline all reinforce that balance.

Preview a middle-part cut

Score 80–89

Typical symmetry. A soft side part toward your fuller side and slightly asymmetric layers hide the difference better than a severe center part. Frames with a straight browline give the eyes a level reference.

Find a level-browline frame

Uneven eye height

Choose glasses with a strong, straight top bar; shape the higher brow slightly lower; avoid tightly centered updos that draw a vertical line through the face.

Measure each eye's tilt

Uneven jaw or chin

Volume and texture at jaw level, a deep side part and asymmetric V or wrap necklines break up the lower-face outline. Short boxed beards are the menswear equivalent.

See necklines for your jaw

Score under 70

Retake the photo first: arm's length, camera at eye level, neutral expression, light from the front. If the score stays low, prioritize hair partings and frames, which change perceived symmetry the most.

Compare two photos

Face Symmetry Test: frequently asked questions

What is a good face symmetry score?

On this scale most real faces score between 80 and 93. Anything above 90 is strongly mirrored. Scores do not need to be near 100 to read as attractive: research on facial attractiveness finds that average levels of asymmetry are not noticed by observers at a glance.

Why does my face look more asymmetric in photos than in the mirror?

You are used to your mirror image, which is flipped left to right. A photo shows the un-flipped version, so every small asymmetry appears on the 'wrong' side and looks unfamiliar. Psychologists call this the mere-exposure effect: people prefer the mirrored version of their own face, while friends prefer the true version. Close-up phone lenses add perspective distortion on top of that.

Is facial asymmetry normal?

Yes. Every face is asymmetric to some degree; one eye is often slightly higher, one side of the jaw slightly fuller and the nose tip slightly off-center. Clinically significant asymmetry is much larger than the differences this test usually reports and should be assessed by a doctor, not an app.

Why does my symmetry score change between photos?

Head turn (yaw), lens distance and expression all shift landmarks. Turning your head even 5° compresses one side of the face. For a repeatable score, hold the phone at arm's length at eye level, look straight into the lens, relax your face and keep the light in front of you.

Can you fix facial asymmetry without surgery?

You cannot change bone structure, but you can change what people notice. A side part toward the fuller side, brow shaping, frames with a level top line and asymmetric necklines reduce perceived asymmetry. Chewing evenly and good posture affect soft tissue over years, not weeks.

How accurate is a browser symmetry test compared with a clinic?

MediaPipe places landmarks with pixel-level consistency on clear, frontal photos, which makes the relative score repeatable. Clinics use calibrated 3D photogrammetry or CT, which measures true depth and millimetres. Treat this test as a consistent, private estimate for styling, not a diagnosis.

Does symmetry make a face more attractive?

Studies find a modest link between symmetry and attractiveness ratings, mostly when faces are compared side by side. In everyday life averageness, skin quality, expression and grooming matter more. That is why we show symmetry next to proportions and styling, not as a stand-alone verdict.

References

Kartynnik Y, Ablavatski A, Grishchenko I, Grundmann M (2019). Real-time Facial Surface Geometry from Monocular Video on Mobile GPUs. CVPR Workshop on Computer Vision for AR/VR.
Thornhill R, Gangestad SW (1999). Facial attractiveness. Trends in Cognitive Sciences 3(12):452–460.
Rhodes G (2006). The evolutionary psychology of facial beauty. Annual Review of Psychology 57:199–226.
Mita TH, Dermer M, Knight J (1977). Reversed facial images and the mere-exposure hypothesis. Journal of Personality and Social Psychology 35(8):597–601.
Ward B, Ward M, Fried O, Paskhover B (2018). Nasal distortion in short-distance photographs: the selfie effect. JAMA Facial Plastic Surgery 20(4):333–335.

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