What is facial fifths?

A proportional division that splits total face width, ear to ear, into five columns: the width of each eye, the gap between the eyes, and the width from each outer eye corner to the nearer ear.

How Facemap measures facial fifths

Facemap locates the outer ear line, both inner and outer eye corners and the nasal base from the 478-point mesh, then expresses each of the five columns as a percentage of total face width so the comparison is scale independent.

What the typical range looks like

An even five-way split is the reference point, but most measured faces show one or two columns running slightly wider or narrower, usually the outer columns nearest the ear. That variation is normal and rarely visible without measurement.

How to read your result

Facemap reports each column separately rather than a single average, so you can see whether a wider or narrower column sits at the eyes, the intercanthal gap or the outer face. Read it alongside eye spacing for the fuller picture.

The facial fifths formula: how we calculate it

Evenness of the five vertical columns across face width. Landmark numbers are MediaPipe Face Landmarker indices, and every distance is normalised to your own face so camera distance and image size cancel out.

standard deviation of the five columns / their mean

Landmarks used

234, 33, 133, 362, 263, 454

Reference target

0, five equal columns

Tolerance band

0.40

Your reading is compared with that published reference on a Gaussian match curve: score = round( 100 x exp( -0.5 x ( (reading - target) / tolerance )^2 ) ), clamped to 1 to 99. Basis for the reference value: published reference range for horizontal facial divisions. The headline Attractiveness Score works differently: all readings are corrected for head angle and expression, weighted by confidence and mapped onto a 1 to 100 scale by a model calibrated against a published research set of more than Facemap scans.

Read the full Facemap methodology, including how the 22 measurement categories combine into your Attractiveness Score.

Facial fifths reference table

Column deviation from an even fifth and how each reads.

• Within 2%Even

  Columns close to the reference split

• 2 to 5%Balanced

  The band most measured faces fall into

• 5 to 9%Uneven

  One column, often outer, reads visibly wider

• Above 9%Distinctive

  A clear horizontal proportion signature

The five columns of the facial fifths reference

Each column is measured independently from ear to ear, using the eyes and nose as internal reference points.

• /Right ear to right outer eye corner
• /Right outer eye corner to right inner eye corner
• /Right inner eye corner to left inner eye corner
• /Left inner eye corner to left outer eye corner
• /Left outer eye corner to left ear

Why the fifths rarely land exactly even

The reference is a convention from classical portraiture, not a biological rule, so real skulls vary more than the diagram suggests.

• /Orbital width varies independently of ear position
• /Nasal base width shifts the middle three columns
• /Head width at the ear is affected by camera angle if the scan is not front-on
• /Ancestry and sex both shift typical proportions

Facial fifths versus facial thirds

Fifths describe horizontal balance, thirds describe vertical balance, and the two are independent measurements. A face can read evenly in one axis and unevenly in the other, so treat them as separate signals rather than one combined score.

The facial fifths formula, step by step

The formula behind this calculator expresses each of the five columns as a percentage of total face width, so the columns can be compared directly against an even one-fifth share regardless of how close or far you sit from the camera.

• /Measure total face width from right ear to left ear
• /Measure each of the five columns between the ear, eye and nose landmarks
• /Divide each column's width by total face width
• /Multiply by 100 to express each fifth as a percentage
• /Compare each percentage against an even 20 percent share