Two open angular readings
Image-left and image-right canthal tilt in degrees, measured separately after head-roll correction.
FREE TOOL / YOUR FEATURES IN FOCUS
Canthal tilt calculator
Measure the angle of each eye’s corner line. See both angles, their direction, and the reference lines on your photo.
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01Two open angular readings
02A visible reference line
03Three supporting readings
SEE WHAT YOU GET
Canthal tilt calculator: a result you can explore.
See both corrected eye angles with their drawn reference lines.
See the report in actionRead your canthal tilt on both eyes
LIVE EXAMPLE · AI-CREATED ADULT PORTRAIT
Two eye lines. One corrected reference.
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The overview shows both angles together. Select an eye for its individual reading; an upward angle is not a target to achieve.
Are my eye corners upward, level or downward?
See each corner line against the fitted face horizontal. Both eyes are measured separately after head-roll correction.
- 01
Read both sides
Compare the image-left and image-right angles, rather than one averaged number.
- 02
Check head position
Use the roll reading and the drawn horizontal to understand the correction.
- 03
Keep the frame visible
Move hair away from the corners and use a relaxed, eye-level photo.
WHAT YOU RECEIVE
Canthal tilt results: both eye angles
The free canthal tilt result shows both eye-corner angles, head roll, eye-width balance and eye spacing. Left and right refer to the photograph, so the labels remain tied to the evidence you see.
A visible reference line
Inspect eye-corner endpoints against the horizontal of the fitted face axis.
Three supporting readings
Head roll, left/right eye width and eye spacing help you interpret the photo conditions.
Positive, negative and neutral canthal tilt
The sign is descriptive. Our near-level display band is a product convention, while the underlying degree values remain visible for each side.
Positive tilt: the outer corner is higher
After roll correction, an outer corner above the inner corner produces a positive angle. FaceRater labels values above +1° as upward in this photo. The number describes an orientation; it is not an attractiveness score or an endorsement of one eye shape.
Negative tilt: the outer corner is lower
An outer corner below the inner corner produces a negative angle. Values below −1° are labeled downward in this photo. Camera height, head pitch, expression and corner visibility can affect a measured negative reading; compare matched photos before interpreting a small difference.
Near-neutral: a display band around zero
Values from −1° through +1° are labeled nearly level. This is a practical product display band, not a validated normal range. The actual angle remains visible to one decimal place, so a label does not conceal which side of zero the reading falls on.
Canthal tilt: how it works
Choose the question you want to explore. The definitions, examples and research are here when you need them.
What is canthal tilt?
Canthal tilt describes the direction of the line between the inner and outer eye corners. This tool measures that image angle against a fitted face horizontal.
Canthi are the eye corners
The inner canthus is the corner near the nose; the outer canthus is toward the temple. This calculator measures the angle of the line joining them in the photo, relative to a horizontal derived from the fitted facial axis. It does not measure the eyebrow slope or the eyelid crease.
Each eye can have a different reading
The tool reports both angles instead of hiding them in a single average. The sides may differ because of visible geometry, expression, pose or detector placement. Open each overlay and make sure its endpoints follow the corners you can actually see.
Image sides need an explicit label
The eye on the left of the displayed photograph is called image-left. If a selfie is mirrored, anatomical left and right reverse. These labels make the measurement reproducible without assuming how your camera saved the file.
Canthal tilt photography: why head pitch still matters
A corrected horizontal improves the definition of an image angle. It does not remove every way a photograph changes the visible eye area.
A small controlled study tested head pitch
Vaca and colleagues photographed 12 adult female volunteers at different sagittal head tilts and evaluated periorbital appearance. Measured appearance changed with pitch. This supports consistent capture; the study does not provide a universal “best” tilt or a validation of this detector.
Roll and pitch are different movements
Roll rotates the face within the photograph, like leaning an ear toward a shoulder. Pitch changes the chin-up or chin-down view. This tool corrects fitted roll and reports it; it does not reconstruct a standardized three-dimensional eye position.
Use a level camera and relaxed eyes
Position the camera in front of the face at eye level and keep the whole face visible. If the report suggests a retake, improve that setup before reading small angular differences as stable features.
Sources: Vaca et al. · The Influence of Sagittal Head Tilt on Periorbital Appearance
How to measure your canthal tilt
FROM PHOTO TO REPORT
Use an eye-level portrait, inspect both corner lines and read the degree values with pose context. The two angles and supporting readings remain free.
- 01
Show both eye corners clearly
Use a front portrait at eye level with your eyes open naturally. Avoid squinting, heavy glare or hair over the corners. Confirm permission before selecting one adult photo.
- 02
Read each eye separately
The scan corrects rotation in the image plane, then measures the inner-to-outer corner angle for each eye. Left and right refer to the photograph, not your anatomical sides.
- 03
Check the lines before the label
Select either angle to inspect its endpoints and reference horizontal. Read the degree value alongside the direction label. Retake if a corner is misplaced or the head is turned or pitched.
Read your canthal tilt test without chasing an ideal angle
A USEFUL NEXT STEP
A useful measurement tells you where the line came from and when to retake the photograph. It does not turn eye vocabulary into a hierarchy.
If one angle surprises you
Open that side’s diagram and find the inner and outer corner anchors. Eyeliner, glare or a partly obscured corner can complicate detection. Retake with both eyes clearly visible rather than judging from the number alone.
If two photos disagree
Compare head pitch, camera height and eyelid position as well as roll. Leveling an image cannot reproduce the appearance of an eye photographed from a different vertical viewpoint.
If you searched for “hunter eyes”
That phrase bundles several perceived eye-area traits. A corner angle alone does not measure eye depth, eyelid exposure or a complete eye shape. Use the result to answer the angle question it actually measures.
How the canthal tilt calculator measures your photo
The method uses detected corner points and a corrected image reference. It does not estimate a three-dimensional eye socket or establish an attractiveness grade.
Work in image pixels, not normalized squares
The scan converts normalized coordinates using the real image width and height before calculating angles. This matters for non-square photographs: treating both axes as the same scale would change the angle. The same measured coordinates feed the report and photo figure.
Remove roll before measuring the corner rise
FaceRater fits an axis from the brow-area point to the chin and removes its image-plane rotation. The eye-corner angle uses vertical rise relative to the absolute horizontal run, keeping positive upward for both eyes. The overlay shows the fitted horizontal as a dashed guide.
Pitch and perspective remain in the result
Roll correction does not turn a two-dimensional portrait into a three-dimensional scan. A small controlled study of twelve adult women found that forward/backward head tilt changed photographed eye-area measurements. That supports careful capture, not a universal preferred angle or an accuracy claim for this tool.
Sources: Vaca et al. · The Influence of Sagittal Head Tilt on Periorbital Appearance
What an eye tilt test can and cannot tell you
Use the angle to answer an angle question. Keep broader eye-shape descriptions, photographic variation and personal preference separate from this one measurement.
An angle does not identify hunter eyes
The phrase hunter eyes is used online for a mix of eyelid exposure, opening shape, brows and perceived depth. Canthal tilt supplies one angular reading. It cannot classify that whole appearance, assess orbital depth or predict how other people will judge your eyes.
Tilt is different from eye symmetry
Two eyes can have similar corner angles but sit at different heights, or differ in opening width. The symmetry test compares paired locations across the face axis. Use it when the question is alignment rather than whether an individual eye line slopes upward.
Inspect paired eye and brow alignment ↗Keep the rest of the face in context
Eye spacing is a different relationship again: inner-corner gap divided by average eye width. Neither the angle nor the spacing ratio stands in for a whole-face attractiveness judgment. The proportions tool separates these relationships so each number has a clear meaning.
Compare eye spacing and other facial proportions ↗BEFORE AND AFTER YOUR SCAN
Canthal tilt questions, answered
These answers cover the canthal tilt questions that affect how you use and interpret the result. Open a question for its measurement definition or a practical next step.
How do I test my canthal tilt?
Choose a clear front portrait above. The free result shows image-left and image-right angles, their directions and supporting readings. Select an angle to inspect its measured corners and reference line.
What is a neutral canthal tilt?
Mathematically, zero means level corners relative to the chosen horizontal. FaceRater uses −1° to +1° as a near-level display band. That convention is not a clinical or population normal range.
Is positive canthal tilt always more attractive?
This tool does not establish that. It measures the direction in your photograph. Eye appearance involves more than one angle, and the calculator has not been validated against representative human attractiveness ratings.
Does the test correct my head position?
It removes image-plane roll using a fitted face axis. It does not fully correct head turn, forward/backward tilt, camera height or lens perspective.
Why do my two eyes have different canthal tilt?
Visible geometry and capture conditions can both contribute. Check the corner placements and take a matched upright portrait. The tool cannot determine a medical cause from that difference.
Are both eye angles behind a paywall?
No. Both angles, the overlays, head roll, eye-width balance and eye-spacing reading are free. The optional full report adds the wider facial geometry analysis, plan and PDF; preview checkout uses test funds only.
Canthal tilt: sources and measurement notes
Written and reviewed by FaceRater · . Research provides context; it does not validate our scoring formula. Product definitions and limitations are explained in the measurement method.
- Google AI Edge · Face Landmarker for Web
Detector documentation; supports landmark capability, not a beauty-score claim.
- Vaca et al. · The Influence of Sagittal Head Tilt on Periorbital Appearance
Small controlled study of head pitch and photographed eye appearance; not a population norm or detector accuracy study.
THE COMPLETE FACE REPORT
See the complete sample Place the eye angles in the context of your whole portrait
Both tilt angles are already free. Choose the complete report when you also want the other eye-area pair readings, all facial regions and a plan for comparing reversible framing choices. No paid tier promises to change an angle.
Try the canthal tilt.
See both corrected eye angles with their drawn reference lines.
Explore the sample report