Skip to main content
AI Rate Face
Local angle tool

Canthal Tilt Calculator

Calculate left, right and average visible canthal tilt from a front-facing photo. Positive, neutral and negative are geometric direction labels—not ratings.

Analyze a photo locally →
On-device analysis

Calculate visible canthal tilt

The browser measures both eyes locally and displays the exact photo angles.

Photo stays in this browser

Choose one clear adult portrait

Front-facing, neutral expression, even light. JPG, PNG, WebP, HEIC or HEIF up to 10 MB.

or drag and drop it here

Before you analyze

  • 1Use your own photo, or one you have permission to use.
  • 2One adult face only. No minors or age estimation.
  • 3Results describe this photo, not objective beauty or health.

A typical first run loads about 15 MB of model/runtime files, then the browser caches them. Nothing is submitted to our analysis API.

Local mode: the selected image and detected landmarks are held in page memory only and are cleared when you reset or leave.

Drag to reposition
Local face crop

Adjust the face area

Keep one full face inside the oval. Leave the hairline and chin visible, with a little space around the head.

For more reliable detection

  • • Select only one adult when the photo contains several people.
  • • Avoid cutting through the forehead, chin or either side of the face.
  • • Cropping helps framing, but cannot restore blur or very low resolution.

The crop is created in this browser and is never uploaded.

What it measures

Evidence behind this result

The output is built from inspectable photo geometry and a separate image-quality signal.

01

Two eye angles

Measures each outer corner relative to its corresponding inner corner.

02

Average direction

Labels averages above +2° positive, between −2° and +2° neutral, and below −2° negative.

03

Agreement

Shows whether pose or natural difference produces unequal photo angles.

01Visible landmarks
02Normalized geometry
03Explainable output
Three-step method

How this tool works

01

Locate

Inner and outer corner landmarks are detected for both eyes.

02

Correct

The calculation uses image-pixel coordinates and reports eye-line roll separately.

03

Classify

The average is assigned a plainly defined directional band.

478 visible landmarksMediaPipe Tasks Vision 0.10.35Model: float16 v1Runs in browser
Read the shared methodology →
Interpret carefully

What the result cannot tell you

01

Canthal tilt in a photograph is affected by head roll, yaw, lens distortion and expression.

02

The result is not a clinical measurement and cannot assess eyelid function or eye health.

03

Positive, neutral and negative describe direction only; none is inherently better.

Questions, answered

About this tool

How local processing works →
What is positive canthal tilt?+

In this calculator it means the visible outer eye corner is more than 2° higher than the inner corner.

Why are my two eyes different?+

Natural asymmetry is common, and even small head rotation can make the photo angles differ.

Can this diagnose an eye condition?+

No. It is a non-medical photo geometry tool.

Keep exploring

Related tools

View all tools →
Adult portrait with a complete face-analysis landmark overlay
AI report

AI Face Rater

A free on-device face score, face-shape match, symmetry breakdown and practical photo and styling plan.

Open tool →
The same adult portrait shown under two different lighting conditions
Photo decisions

Compare Two Photos

Upload two photos and see which one presents better, broken down by lighting, sharpness, head angle and framing.

Open tool →
Three aligned photos of the same adult face for a consistency comparison
Photo decisions

Face Score Consistency Test

Run two or three photos of the same face to see how much of a score change is the face and how much is the photography.

Open tool →