Canthal Tilt Calculator
Upload a photo to measure your canthal tilt in degrees — the angle from your inner to outer eye corner — and see whether it's positive, neutral, or negative. Runs entirely on your device; nothing is uploaded.
Processed on your device — your photo is never uploaded anywhere.
How this works
On-device AI locates the inner and outer corner of each eye directly in your browser, then measures the angle each eye corner line makes against true horizontal. We report each eye individually — small differences between your two eyes are completely normal — plus the average of both as your overall canthal tilt.
Positive vs. negative, in plain terms
Picture a straight horizontal line running out from the inner corner of your eye. Positive canthal tilt means the outer corner sits above that line — an upturned look. Negative means it sits below — a downturned look. Neither is a defect; it's simply eye shape, and it varies enormously across otherwise very different faces.
Frequently asked questions
What is canthal tilt?
Canthal tilt is the angle of the line running from the inner corner of your eye to the outer corner, measured against horizontal. If the outer corner sits higher than the inner corner, that's a positive tilt. If it sits lower, that's negative.
What's a normal canthal tilt?
Most faces fall somewhere between 0 and 8 degrees positive. A tilt close to 0° reads as neutral or horizontal; more negative than that is less common and often described as downturned.
Is positive canthal tilt more attractive?
It's one of many features that gets discussed in online beauty-standard communities, but attractiveness research doesn't support treating a specific eye angle as a fixed requirement. Plenty of widely-considered-attractive faces have neutral or slightly negative tilt. Don't let a number on a screen be the basis for a decision about surgery.
Why do my two eyes show different numbers?
Small left-right asymmetry is completely normal — most faces aren't perfectly symmetric. We show both eyes individually plus the average so you can see the actual spread instead of a single number hiding it.
What throws off the measurement?
Head tilt, camera angle, lens distortion, squinting, and shadows around the eye corners all shift the result. This is an estimate from a 2D photo, not a clinical or diagnostic measurement — use a straight-on, well-lit, neutral-expression photo for the most consistent reading.
Is my photo uploaded anywhere?
No. Face detection and every measurement run locally in your browser using on-device AI. Nothing about your photo is sent to a server at any point.
Want the full picture?
This tool checks one measurement. Our full face score breaks down 50+ parameters — symmetry, skin, jawline, hairline, and more — with a personalized plan to improve what it finds.
Get Your Free ScoreCurious about your overall proportions? Try the golden ratio calculator.