Visible vertical thirds
Three sections follow the upper visible contour to the brow area, the middle face, and the chin.
Shown as three percentage shares of the visible vertical path.
Free facial analysis tool
Read visible vertical thirds, horizontal fifths, and face length-to-width from one front photo. Every line is drawn over your image so the result can be checked.
Free · no sign-up
Keep the lens at eye level, both sides visible, and your expression relaxed.
What gets measured
The calculator reports three photo proportions separately rather than pretending that a single ratio can define a face.
Three sections follow the upper visible contour to the brow area, the middle face, and the chin.
Shown as three percentage shares of the visible vertical path.
Five adjacent sections run from one visible side of the face, through the eye region, to the opposite side.
Shown as five percentage shares of the visible horizontal path.
Visible length from upper contour to chin is divided by the visible cheek-to-cheek width. The unit cancels, leaving a photo ratio.
Shown as one simple length-to-width relationship.
The upper reference follows the visible facial contour rather than a clinically identified hairline. That is why this page says “visible thirds.”
Photo protocol
Each value divides one image distance by another. Anything that changes perspective can stretch one side of that division more than the other.
A camera above or below the face changes the apparent vertical sections and visible chin length.
Turning the face narrows the farther outer fifth and changes visible face width.
A close wide-angle selfie enlarges the centre of the face relative to the outer contour.
Relax the brows and mouth, use even light, and keep hair from hiding the visible face edge.
How to read the values
The free PSL calculator compares these values with fixed site references. This page shows the raw geometry so you can see what the calculation actually received.
These sections begin at the visible upper contour, so they should not be confused with classical equal-thirds diagrams that begin at the hairline.
The five sections provide a simple spacing comparison across this photograph. A difference describes the image; it does not identify a flaw.
The relationship provides context for visible face shape. It is neither the golden ratio nor a universal ideal.
The result comes from a flat photograph, not millimetres or a depth scan. Hair, pose, lens distortion, and image quality can change it.
Common questions
No. It reports three specific photo measurements and does not compare a face with 1.618 or claim that one ratio defines attractiveness.
Classical thirds begin at a hairline. This photo measurement begins at the visible upper facial contour, so the three sections answer a slightly different question.
No. The selected photo is used for this measurement and is cleared when you reset or leave the page.
No. They describe how selected points divide one photo. Appearance involves much more than three ratios, and this tool does not provide medical, beauty or population conclusions.
Check a different relationship
The face symmetry test mirrors 12 point pairs across a fitted facial midline and shows the remaining differences directly on your photo.
Both free tools follow the same photo and interpretation standards.