How Ratioface Calculates Your Facial Analysis Score

score100 = round(1000 * (0.40*S + 0.20*T + 0.20*F + 0.20*G)) / 10; score10 = score100 / 10

S, T, F and G are symmetry, visible thirds, horizontal fifths and the contour ratio component. clamp limits each component to 0–1. The canonical score is 0–100, rounded once to one decimal; divide it by ten for the 0–10 display with two decimals. For example, 81.3 / 100 is 8.13 / 10. These are two displays of the same score.

If the photo does not contain enough of the face to compute every required measurement, we return no score at all, and tell you why. We do not fill a gap with an average or a guess.

We convert landmarks to image pixels, align the line between the eye centers horizontally and place its midpoint at the origin. Eye centers are the midpoints of 33/133 and 263/362. We mirror ten selected pairs across the vertical axis through that origin. The mean pair distance is divided by cheek width d(234,454), giving the normalized mirrored pair deviation.

S = clamp(1 - mirrored pair deviation / 0.12)

The ten pairs are 33/263, 133/362, 159/386, 145/374, 105/334, 98/327, 61/291, 234/454, 172/397 and 103/332. The tolerance 0.12 is a product setting, not a clinically or aesthetically validated normal range. Small asymmetries are not defects.

Visible thirds use aligned vertical coordinates: contour point 10 to the midpoint of brow points 105/334, that brow midpoint to nose point 2, and point 2 to chin point 152. Each segment is divided by the total contour height y152 - y10. The reference is one third for each segment.

T = clamp(1 - sum(abs(visible third - 1/3)) / 0.60)

Point 10 is a visible contour landmark, not the true hairline. These are visible contour thirds, not anatomical hairline thirds. We add the absolute deviations of all three segments and use a tolerance of 0.60 (see limitations).

We use the aligned horizontal positions of 234, 33, 133, 362, 263 and 454, reversing their order when necessary to read left to right. The five adjacent widths are divided by the horizontal span between cheek points 234 and 454. We add their absolute deviations from 0.20 and use a tolerance of 0.80. Ear edges are not measured.

F = clamp(1 - sum(abs(horizontal fifth - 0.20)) / 0.80)

This component compares one ratio with the product reference 1.618: aligned contour height (y152 - y10) divided by cheek width d(234,454). It does not combine mouth-to-nose or eye-to-brow ratios. The tolerance is 0.50.

G = clamp(1 - abs(contour height / cheek width - 1.618) / 0.50)

Reaching the reference ratio exactly is not the goal, and most faces sit some distance from it. This component measures distance, not beauty.

All measurements come from a 478-point facial mesh that runs inside your browser. These are the pairs and points our components depend on:

Face shape is a descriptive label, not a score. We compare three ratios with each reference below: d(10,152)/d(234,454), d(172,397)/d(234,454) and d(103,332)/d(234,454). Unlike the aligned vertical height used in the golden ratio component, d(10,152) is a straight-line distance. Differences are divided by 0.20, 0.15 and 0.15 respectively, then combined as a Euclidean distance. The closest reference is the label; the next closest is the alternative.

These boundaries are our own working definition and have not been validated against a labelled reference set. Treat the label as a starting point for the report, not as a classification standard.

So there is no confusion about what the number covers:

All 22 measurements are visible in the free tool. FWHR is cheek width divided by the aligned height from the brow midpoint to upper-lip point 13. Canthal tilt describes eye-corner angles after roll correction. FWHR, canthal tilt and 2D jaw contour angles are descriptors, not additional weighted components. We do not report side-profile ratios or bone angles.

Bands are our product setting. They describe where a score sits in the range, and nothing more:

Current version: harmony-0.3.0.

The same landmark coordinates and image dimensions produce the same score with this algorithm. Repeated photo inference also depends on preprocessing, model version, browser, device and GPU or CPU backend; small numerical differences are possible. Version harmony-0.3.0 replaces the earlier eye-width, centering and eye-spacing components with visible thirds, horizontal fifths and the contour ratio. Weights remain 40/20/20/20; historical results keep their stored version.

No. Face shape and your harmony score are free, unlimited and need no sign-up.

Changing the photo can change the measurement. Use even lighting, no filters and a straight head position. Compare results under similar conditions and with the same model and algorithm versions; different versions may score the same photo differently.

The 40% weight is a product choice that gives symmetry the largest contribution. It is not a calibrated reliability estimate or a scientifically established weight for attractiveness. All four components can be affected by photo conditions.

No. The landmark model runs inside your browser tab. Your photo is never sent to our servers.

The planned $9.99 PDF report saves the same 22 measurements, four scoring components, formulas and photo-quality notes already available in the free tool. It does not unlock extra measurements or predict appearance changes. See a sample report (coming soon).

The full report and payments are not available yet.

The tool displays its algorithm version and formulas. Release checks compare this page’s version, formulas, face-shape references and score bands with the scoring code. If the displayed explanations disagree, tell us — that is a bug.

AI face analysis · Sample report (coming soon) · Face analysis home