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AI Rate Face

Face Ratio Calculator

Upload one front-facing photo and this facial ratios calculator turns it into a neutral proportion table: vertical thirds, fifths-related eye spacing and feature widths. Values are shown as measured, with classical references labelled where they exist.

Analyze a photo →

Calculate facial thirds and width ratios

Upload a photo — every measurement happens on your device. Download the annotated image if you want to keep it.

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.

Your photo and landmarks stay in page memory and are cleared when you reset or leave. Face-shape tools keep a small result summary in this tab for up to 30 minutes so you can continue to hairstyles or glasses. Clear the result to remove it.

Drag to reposition

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.

Evidence behind this result

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

01

Facial thirds

Estimates upper, middle and lower vertical sections from visible landmarks.

02

Fifth-related spacing

Compares face width, eye width and the inter-eye gap.

03

Feature widths

Reports nose and mouth width as a share of visible cheek-level width.

How this tool works

  1. 1. Landmark

    One face is mapped locally into a normalised coordinate set.

  2. 2. Measure

    Distances are calculated in image-pixel space to preserve the photo aspect ratio.

  3. 3. Report

    Percentages and ratios are displayed with only clearly identified references.

Read the methodology →References and limitations →

What the result cannot tell you

01

The upper third depends on the visible hairline/forehead contour and can be affected by hair.

02

Classical thirds and fifths are artistic conventions, not requirements for a normal face.

03

The measurement is two-dimensional and changes with focal length, distance and head angle.

About this tool

How local processing works →
What are facial thirds?+

They are an artistic convention dividing the visible face vertically into upper, middle and lower sections.

What are facial fifths?+

Another classical convention treats facial width as roughly five eye widths, with about one eye width between the eyes.

Can I download the results?+

Yes. After analysis you can download the photo with the relevant local landmark overlay.

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