Tool
Facial thirds test
Measure your facial thirds right in your browser: how much of your face the hairline-to-brow, brow-to-nose, and nose-to-chin segments each take. Tap four landmarks on a photo and the ratios compute locally — the photo is never uploaded, stored, or sent anywhere.
The photo stays in your browser. Nothing is uploaded, stored, or sent anywhere.
How to get a cleaner measurement
Use a straight-on photo, head level, taken from at least arm's length — a close-range selfie's wide-angle lens compresses vertical proportions. If your hairline has receded, use your original hairline position (where the forehead muscle starts) for the anatomical convention. The same face will read 1-3% differently across photos; that's hand-placed landmark error, not your face changing.
Do facial thirds have to be equal?
No. "Equal thirds" is a Renaissance drawing convention, not a finding from modern attraction research. Plenty of faces rated highly in practice deviate from it — a slightly longer midface often reads mature and rugged, and a longer lower third with a defined jawline still reads strong. First-glance judgment is holistic: the brain reads the whole combination in about 100 milliseconds (Willis & Todorov, 2006) rather than auditing ratios line by line. Treat your measured numbers as information about your structure, not errors to fix. The full breakdown lives in [facial thirds explained](/blog/facial-thirds) and [uneven facial thirds](/blog/uneven-facial-thirds).
Frequently asked questions
Is the photo really never uploaded?
Really. The tool loads your photo with the browser's FileReader and every calculation is in-page geometry — no network request carries image data. You can verify with the Network panel in your browser's developer tools.
What is the ideal facial thirds ratio?
The classical canon says 1:1:1, but that's a drawing convention, not a law of attraction. Deviations within ±10% are extremely common, and any single ratio weighs far less in a first impression than the whole-face combination. Measure, see which third deviates and by how much, then judge against the mirror — not against the canon.
How do I measure facial thirds manually?
Four landmarks: mid-hairline, glabella (the point between your brows), subnasale (where the nose base meets the upper lip), and the bottom of the chin. The three segment lengths form your thirds. This tool has you tap those four points on a photo and computes the ratios for you.
Are facial thirds the same as midface ratio?
No. Thirds slice the whole face vertically into three segments; midface ratio specifically relates the pupil-to-upper-lip distance to facial width. It's a separate metric — measure it with the [midface ratio calculator](/midface-ratio-calculator).
Ratios describe your structure — the combination decides the read
1 minute. The AI reads your full photo — face, physique, outfit, vibe — against first-impression data and writes the actual read, your ceiling, and the plan.