Canthal Tilt Calculator: Measure the Tilt of Each Eye
Upload a selfie and see the canthal tilt of each eye in degrees, corrected for head roll, next to the typical range from rated faces.
- Photo stays on your device
- No sign-up
- Free, no limit
Add a front-facing photo
JPG, PNG or WebP · up to 10 MB · one face, looking straight ahead
- Your photo never leaves your device.
- For adults 18+.
Loading the face model (about 6 MB, once)…
Your result shows up here
A PSL range, three geometry scores, your eye type and the lines we measured.
By the numbers
- face points found in your browser
- 478
- ratios and angles measured
- 22
- people rated the faces our ranges come from
- 2,513
- photos sent to a server
- 0
Typical ranges
Typical ranges we compare you with
From 101 adult faces rated by 2,513 people (Face Research Lab London Set). Where men and women differ, both ranges are shown; you choose which one applies.
| Measurement | Typical range | Centre | What it is |
|---|---|---|---|
| Canthal tilt | 0.6°–7.4° | 4.0° | A mild positive tilt (outer corner higher) is preferred by convention. |
How it works
Three steps, about a minute
Step 1: Add a photo
Upload a front-facing photo or use your camera: good light, neutral face, lips closed.
Step 2: Get measured
Your browser places 478 points on your face and computes the measurement on the spot.
Step 3: Read your number
See your value next to the typical range, with the lines drawn on your photo.
What it measures
What canthal tilt is
- The angle of the eye
- Canthal tilt is the angle of the line from the inner corner of the eye to the outer corner, measured against horizontal. Positive means the outer corner sits higher, negative means it sits lower, around zero is neutral.
- Each eye on its own
- We measure the right and the left eye separately and show both, plus the average. A degree or two of difference between sides is normal.
- Corrected for head roll
- If your head is tilted, both eyes tilt with it. We measure the roll of the whole face from both eyes and remove it, so a tilted selfie does not turn into a positive or negative tilt.
- The typical range
- On 101 rated adult faces most tilts fall between about 0.6° and 7.4°. A mild positive tilt is the community convention for an attractive eye area, not a medical standard.
Photo tips
Take a photo that measures well
- Face the light
- Stand facing a window or a lamp so both sides of your face are lit evenly. Light from one side or from above throws shadows that shift where the jaw, nose and eye corners appear, and a dark photo is rejected.
- Hold the camera at arm's length
- A phone held close to the face widens the nose and the middle of the face. Hold it at arm's length or prop it up a little further away, then crop if you need to. The ratios do not depend on how big your face is in the frame.
- Keep your head level
- Put the camera at eye level and look straight into the lens. A raised chin shortens the lower face and a lowered chin lengthens it. The test rejects photos with too much tilt or turn, so you will see a hint if this happens.
- Neutral face, lips closed
- Smiling lifts the cheeks and changes the mouth, eye and jaw measurements. Use a relaxed expression with your lips together and your eyes open as they normally are.
- Show the whole face
- Keep your full face in the frame from forehead to chin, push hair away from the jawline and take off glasses. Hats, hands and heavy filters hide the points the test needs.
- Compare two or three photos
- Every photo is a little different. Take a few in the same spot and look at the range they give you rather than trusting a single result.
Privacy and accuracy
What happens to your photo
Your photo stays on your device
The free test runs inside your browser. Your photo is not uploaded, stored or sent to anyone, and we keep no copy of your scores.
How far to trust the numbers
Lighting, lens distance, head angle and expression all shift facial ratios. Take two or three photos and compare. The typical ranges and the 1–8 scale are set from 101 adult faces that 2,513 people rated for attractiveness (Face Research Lab London Set, DeBruine & Jones 2017, CC BY 4.0). On those faces the geometry score agrees with the ratings only in part, because proportions are only part of attractiveness.
What a photo cannot show
The eye corner is read from the visible lid edges. Eyelid shape, hooding and upper eyelid exposure change how tilt looks but are not part of this number.
More free tests
Run another free test
All measurements, PSL range and eye type in one go.
Facial width-to-height ratio.
Middle versus lower third of the face.
Pupil distance against midface height.
How evenly the two sides match.
Face length to width, next to 1.618.
FAQ
Questions people ask
- Can canthal tilt be measured from a photo?
- Yes, from a straight-on photo with the head level. The face points find both eye corners; we take the angle and remove head roll. A camera above or below eye level shifts the result slightly, so take two or three photos.
- What is a good canthal tilt?
- By community convention a mild positive tilt, roughly 2° to 6°, is seen as attractive. On the rated faces we calibrated with, most people fall between about 0.6° and 7.4°. A neutral or slightly negative tilt is common and not a flaw.
- Why are my two eyes different?
- Faces are not perfectly symmetric, and the lid edges of each eye differ a little. Differences of one or two degrees are normal.
- Does canthal tilt decide hunter eyes?
- It is the main part. The hunter eyes test combines tilt with eye shape and spacing and shows hunter, neutral or prey with the thresholds we use.
Ready when you are
One photo, about a minute, nothing uploaded.